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Selective or optional sources

Subclass of:

307 - Electrical transmission or interconnection systems

307043000 - PLURAL SUPPLY CIRCUITS OR SOURCES

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Class / Patent application numberDescriptionNumber of patent applications / Date published
307081000 Predetermined sequence 15
Entries
DocumentTitleDate
20090134708MAXIMUM VOLTAGE SOURCE SELECTOR - A maximum voltage source selector adapted for use in a semiconductor device operative in a disable state or an enable state is disclosed. The maximum voltage source selector includes an output unit having an output node providing a maximum voltage selected from a first input voltage and a second input voltage. First and second gate transistors are commonly coupled to the output node and are respectively configured to select and provide the greater of the first and second input voltages to the output node in response to first and second selection signals without regard to whether the semiconductor device is in the disable state or the enable state. A selection unit generates the first and second selection signals in response to the first and second input voltages.05-28-2009
20110278937SELECTING A POWER PATH BASED ON TEMPERATURE - This document discusses, among other things, a method for a portable electronic device comprising measuring a temperature of the portable electronic device and switching a power path for the portable electronic device from an external power source to an internal power pack, such as a battery, based on the temperature of the portable electronic device.11-17-2011
20120161527PHOTOVOLTAIC DC/DC MICRO-CONVERTER - A photo-voltaic (PV) power generating system and a control system for PV array string-level control and PV modules serially-connected into strings of PV modules. The system includes plural parallel strings of serially-connected power-generating photovoltaic modules that form a PV array, DC/DC micro-converters that are coupled to a DC voltage buss and to the output of a corresponding photovoltaic module or to the output of a string of photovoltaic modules; a gating or central inverter; and a control system. The micro-converters are structured and arranged to include at least one of: an active clamp device, a ground fault detection device, and a fractional power converter that injects power in series or in parallel with voltage or current from the power-generating portion onto the DC buss.06-28-2012
20100164293ELECTRONIC CARD CONNECTOR, LEVEL-SHIFTING DEVICE AND DIGITAL TELEVISION RECEIVER - An electronic card connector is used to connect an electronic card to an electronic device, such as a level-shifting device. The electronic card connector includes an insert slot unit and a switch unit. The insert slot unit is adapted for insertion of the electronic card and is provided with a power signal terminal for providing electric power to the electronic card that is inserted into the insert slot unit. The 10 switch unit is disposed in the insert slot unit, is operable to establish electrical connection between the power signal terminal and a first power source when the electronic card inserted into the insert slot unit does not actuate the switch unit, and is further operable to establish electrical connection between the power signal terminal and a second power source when the electronic card inserted into the insert slot unit actuates the switch unit.07-01-2010
20100079004System and Method for Managing the Distributed Generation of Power by a Plurality of Electric Vehicles - A system and method for managing the distributed generation of power from a plurality of vehicles is provided. In one embodiment, the method includes determining location information for the plurality of vehicles, determining that a demand for power in a first portion of the power grid has reached a power threshold, determining that the location information associated with a set of the plurality of vehicles satisfies a similarity threshold with the first portion of the power grid, and transmitting a request to a first group of vehicles in the set of vehicles to discharge power. In addition, the method may include receiving a response from at least some of the electric vehicles to which a request was transmitted, and determining whether to request the discharge of power from additional vehicles in the set of the plurality of vehicles based, at least in part, on the number of responses containing a confirmation of the discharge of power. The portion of the power grid may comprise a medium voltage power line or a substation.04-01-2010
20100072822Power Supply System and Related Method and Related Portable Electronic Device - A power supply system installed in a portable electronic apparatus includes a plurality of receiving ends, a selection unit, a power control unit, and a power converting unit. The plurality of receiving ends is coupled to a plurality of power sources of the portable electronic apparatus. The selection unit is coupled to the plurality of receiving ends for selecting an input power from the plurality of power sources. The power control unit is utilized for generating an output power control signal according to an input signal. The power converting unit is utilized for converting the input power into an output power to a power port according to the output power control signal.03-25-2010
20100072821SEMICONDUCTOR DEVICE - Operating speed as well as output accuracy of a D-A converter is enhanced. With a semiconductor device including unit current sources, and unit current source switches, plural current source elements constituting each of the unit current sources are disposed so as to be evenly dispersed, thereby reducing errors of the current source element, dependent on distance while the unit current source switches are concentratedly disposed in a small region, thereby mitigating delay in operation, attributable to parasitic capacitance. In addition, with the semiconductor device including R2R resistance ladders, the R2R resistance ladder is provided on the positive and the negative of each of the unit current source switches, and the respective R2R resistance ladders are shorted with each other at respective nodes on a unit current source switch-by-unit current source switch basis, are rendered identical in length, thereby cancelling out a nonlinearity error attributable to wiring parasitic resistance.03-25-2010
20130076148BATTERY DEVICE FOR UNINTERRUPTED POWER SUPPLY AND ELECTRONIC DEVICE WITH SUCH A BATTERY DEVICE - The embodiments described herein provide a battery solution for electronic devices that addresses one or more of the above discussed defects. More specifically, a battery device is provided and capable of uninterruptedly supplying power to an electronic device, even when the rechargeable battery in the electronic device is removed. The battery device according to the various embodiments herein can have a host battery and a main battery, each operable to independently supply power to the electronic device in order for the electronic device to carry out its normal operation. When the main battery is removed from the electronic device, the host battery remains in the electronic device and operates to supply power thereto, so that the electronic device can continue its normal manner without interruption, thereby avoiding power shutdown and rebooting operation of the electronic device. When the main battery is connected with the electronic device, the main battery is capable of charging the host battery, while supplying power to the electronic device.03-28-2013
20130076146Systems and Methods for Detecting Powered or Powering Device Configuration Via Ethernet Connection - Provided is a method for detecting a PoE (power over Ethernet) device comprising applying a positive polarity of a first current source to one of a first and second data pairs of an Ethernet connection to a powered device (PD) and a negative polarity of the first current source to the other of the first and second data pairs, applying a positive polarity of a second current source to a first spare pair of the Ethernet connection and a negative polarity of the first current source to a second spare pair of the Ethernet connection, simultaneously measuring a first voltage across the first current source and a second voltage across the second current source, discontinuing application of the first current source and measuring a third voltage across the second current source, and determining a configuration of the PD using the measured first, second and third voltages.03-28-2013
20130076147MULTIPLE BATTERY POWER PATH MANAGEMENT SYSTEM - Devices, systems and methods are provided for multiple battery power path management. The device may include a first battery port configured to couple to a first battery; a second battery port configured to couple to a second battery; an output voltage port configured to couple to a device to be powered; a battery selection port configured to couple to the device to be powered; a control circuit configured to select one of the first battery and the second battery as a power source battery, the selection based on a signal received at the battery selection port; and a first switch configured to selectively couple the first battery port or the second battery port to the output voltage port, the selective coupling based on a first switching signal generated by the control circuit in response to the selection of the power source battery.03-28-2013
20100033017ELECTRONIC DEVICE - A holding device with charging function includes a holder, a solar power receiving module and a power transformer. The holder is provided for holding an electronic device. The solar power receiving module is coupled with the holder and electrically coupled to the power transformer. The solar power receiving module receives and transforms solar power to a first power source, and the power transformer has an external input port for electrically coupling to an external second power source. The power transformer selectively conducts the first power source and the second power source and transforms the conducted power source to an output voltage.02-11-2010
20090121552A MULTI-VOLTAGE POWER SUPPLY FOR A UNIVERSAL AIRPLANE GROUND SUPPORT EQUIPMENT CART - An airplane ground support system includes a multi-voltage power supply. This system includes an air conditioning module and a control module having a display and a processor, the display and processor presenting an airplane type or class selection menu to airplane support technicians and responding to the selection of a type or class of airplane by generating a power output selection signal designating the type of power needed by the selected type or class of airplane. The system also includes a power supply module which has an A.C. power input, at least one power output, and which receives the power output selection signal as an incoming signal. A power conversion system within the power supply module connects to the A.C. power input and supplies converted and voltage regulated power to the at least one power output. This power conversion system also receives the power conversion control signal as an input signal. A control system within the power conversion module receives measurements of the voltage at the power supply module's at least one power output and also receives the control module's power output selection signal. This control system generates the power conversion system's power conversion control signal and adjusts it to regulate the power module's output to a predetermined preset voltage level as mandated by the power output selection signal.05-14-2009
20100096930Electrical Voltage Supply - A voltage supply has a plurality of voltage sources to supply output connections. To achieve closed-loop control of the output voltage at the output connections, a closed-loop control circuit is provided that has an actuating element for each voltage source, and each respective actuating element has a current path via which a connection of the respective voltage source can be connected to an output connection. Each actuating element has an actuating signal input for setting the electrical conductivity of its current path. The closed-loop control circuit has a closed-loop controller to which the output voltage and a desired voltage signal are supplied. When a deviation occurs between the output voltage and the desired voltage signal, the closed-loop controller interacts with at least one actuating signal input in order to reduce the deviation. The actuating signal inputs are connected to a control device that is designed in such a way, that the current path of at least one actuating element is enabled for control by the closed-loop controller if the output current that is drawn at the output connections is present in a predetermined value range assigned to the respective actuating element, and the current path is disabled if the output current that is drawn at the output connections does not lie in the predetermined value range.04-22-2010
20100096931POWER CONTROL OF TRANSPORT SYSTEM - The power control of a transport system comprises an electric motor for moving the transport appliance as well as a power supply appliance of the motor, which comprises an intermediate circuit. The power supply appliance of the motor is fitted between the power source and the electric motor. The transport system further comprises a rectifier of the intermediate circuit power, which is fitted between the intermediate circuit of the power supply appliance of the motor and the supplied load for transmitting intermediate circuit power to the supplied load.04-22-2010
20130038130DC-TO-AC CONVERTER SYSTEM AND DC-TO-AC CONVERTER CIRCUIT - A DC-to-AC converter circuit includes a step-up converter module and an inverter module. The step-up module includes first and second inductors that cooperate to form a transformer, first and second power switches, and first and second capacitors. When the first power switch and the second power switch conduct, the first inductor and the second inductor store energy from a first variable power source and a second variable power source respectively, and after the first capacitor and the second capacitor provide electrical energy to the inverter module, the inverter module converts the electrical energy provided thereto and outputs converted energy.02-14-2013
20130038129Photovoltaic Array Systems, Methods, and Devices with Improved Diagnostics and Monitoring - Devices, systems and methods for operating, monitoring and diagnosing photovoltaic arrays used for solar energy collection. The system preferably includes capabilities for monitoring or diagnosing an array by automatically disconnecting portions of the array during normal service (when load is not maximum, and observing the resulting change in electrical characteristics. More intensive diagnostic procedures can be launched if needed. One embodiment provides for performing monitoring or diagnostic operations on the array in daylight or at night. Another embodiment allows monitoring or diagnostic operations to be performed on a portion of the array while other parts of the array continue to collect energy. Yet another embodiment provides a safety mode for an array for maintenance or during emergencies.02-14-2013
20130038131SEMICONDUCTOR DEVICE TO SELECT A POWER SUPPLY - A power supply selection/detection circuit to select one main power supply from a plurality of external power supplies includes a resistance element with one end connected to an external power supply and another end connected to the main power supply, a first voltage detector to receive a voltage of the external power supply and detect a voltage of the external power supply, a second voltage detector to detect a voltage between the ends of the resistance element, and a switch connected between the external power supply and a ground to short-circuit or open-circuit between the external power supply and the ground according to an output of the second voltage detector. The resistance element and the first voltage detector are disposed for each of the plurality of external power supplies, and the second voltage detector and the switch are disposed for at least one of the plurality of external power supplies.02-14-2013
20090160257METHOD FOR AUTOMATIC OPERATING VOLTAGE DETECTION - A method for automatic operating voltage detection, in which one internal supply voltage (vdd) is selected from at least two different external supply voltages, with a first external voltage supply (VDDA) being applied permanently, is based on the object of reducing the circuit complexity for automatic operating voltage detection, the operating current caused by the selection arrangement and the required chip area, in which case the voltage ratios between the two different external supply voltages can be as required. This object is achieved in that a reference voltage (Vref) and a voltage (VDDreg) is produced from the first external supply voltage (VDDA), the reference voltage (Vref) is compared with a second external supply voltage (VDDIO), and either the voltage (VDDreg) produced from the first external supply voltage (VDDA) or the second external supply voltage (VVDIO) is released as an internal supply voltage (vdd), depending on the comparison.06-25-2009
20090160256Multi-regulator power delivery system for ASIC cores - A method for operating an electronic product having an application specific semiconductor chip (ASIC) device which includes in its circuitry both a linear regulator module configured to be coupled to an optional external capacitance and a capless regulator module configured to be coupled to internal capacitance of the electronic product utilizes control logic of the ASIC device responsive to a regulator selection signal for selecting one of the linear regulator module and the capless regulator module for use in powering the ASIC device. The control logic may select the linear regulator module for certain times of operation and the capless regulator module for other times of operation.06-25-2009
20130043731MULTI-CELL THIN FILM MICROBATTERY ARRAY - A rechargeable thin film microbattery cell array of at least four thin film microbattery cells is electrically connected together in parallel to provide power as a single battery power source. The array further comprises testing logic to determine if a microbattery cell has a microbattery cell voltage that is more than a predetermined percentage different from the voltage of the overall microbattery cell array or has an absolute voltage below a predetermined cutoff threshold, and logic to disconnect any microbattery cell from the microbattery cell array if the microbattery cell has a microbattery cell voltage that is more than a predetermined percentage different from the voltage of the overall microbattery cell array or has an absolute voltage below a predetermined cutoff threshold. Embodiments also comprise a Switch Capacitor DC-DC downconverter component that reduces the voltage potential to operate some or all functionalities located on the integrated circuit.02-21-2013
20100109441Dual Current Switch Detection Circuit with Selective Activation - A dual current switch detection circuit with selective activation is disclosed. In a particular embodiment, the switch detection circuit comprises an input node coupled to a switch to receive an input signal from the switch, a first current source coupled to the input node, a second current source coupled to the input node, and a detection circuit having an input coupled to the input node and an output coupled to the second current source to selectively activate the second current source.05-06-2010
20130082533SYSTEMS AND METHODS FOR DELIVERING POWER IN RESPONSE TO A CONNECTION EVENT - Systems and methods are provided for delivering power from a first energy source to a second energy source. An electrical system for delivering power from a first energy source to a second energy source comprises an interface configured to be coupled to the second energy source, a switching element coupled between the first energy source and the interface, and a processing system coupled to the switching element and the interface. The processing system is configured to identify a connection event based on an electrical characteristic of the interface that is indicative of the interface being coupled to the second energy source and operate the switching element to provide a path for current from the first energy source in response to identifying the connection event.04-04-2013
20090108677Bidirectional power converters - Circuits and methods for bidirectional power conversion are provided that allow mobile and other devices to generate power suitable to support multiple modes of operation. The bidirectional power converters of the present invention may operate in both step up and step down configurations rather than having a single dedicated conversion function and use many of the same components thereby reducing converter size and complexity.04-30-2009
20090302684POWER SUPPLY CIRCUIT ON MOTHERBOARD - A circuit includes a work-power module, an electronic component, a switching apparatus, and a power control unit. The power control unit includes an input pin connected to the work-power module, an output pin connected to the electronic component, and a control pin connected to the switching apparatus. The switching apparatus is capable of controlling the status of the power control unit. Upon the condition that the power control unit is turned on, the work-power module is capable of supplying power to the electronic component. Upon the condition that the power control unit is turned off, the work-power module is not capable of supplying power to the electronic component.12-10-2009
20090302685BI-DIRECTIONAL NOMINAL CURRENT, VARIABLE POWER AND/OR VARIABLE VOLTAGE, ENERGY TRANSFER CIRCUIT - An energy transfer circuit for connecting a load to multiple energy sources that can have different voltages. The energy transfer circuit connects the load and at least two energy sources, and has a control unit. The energy transfer circuit can transfer energy from at least one energy source to the load in response to the load's power demand; transfer energy from the load to at least one energy source in response to the load's charging current, and transfer energy between the energy sources. The energy transfer circuit also includes a first capacitor in parallel with the primary source and the load; a second capacitor in parallel with the secondary source, an inductor, a first switch between the inductor and the first capacitor, a second switch between the inductor and the second capacitor. The control unit opens and closes the first and second switches in response to the load and sources.12-10-2009
20130057076BATTERY MANAGEMENT SYSTEM, METHOD AND BATTERY - A battery management system includes a master control unit coupled to a plurality of batteries, at least one battery status unit providing data on the status the batteries and a power determination unit providing a measure of the power draw required from the batteries. The master control unit controls the batteries to activate only the number to meet the required power draw. The power determination unit can determine the maximum safe power to a device coupled to the batteries, the master control unit then activating a number of batteries having a combined power capacity not exceeding the safe maximum power. The system allows for a large number of batteries to be coupled to an electrical device and for these to be controlled so as not to produce a current which is too high for the device.03-07-2013
20130069437Method and Apparatus for Control of Commodity Distribution System - A system for automated reconfiguration of a commodity distribution system is provided. The system includes a plurality of nodes located in the distribution system and a plurality of node controllers. The node controllers control respective nodes in accordance with a first or second operating mode to affect system reconfiguration in response to a fault condition, loading, system optimization, system expansion and combinations thereof.03-21-2013
20120223582CELL MODULES FOR DETECTING TEMPERATURE AND VOLTAGE OF CELLS - Disclosed is a distributed battery management system that uses cell modules that are attached to cell terminals. A connector tab extends from the cell modules that provides a solid thermal and electrical connection to a cell terminal, as well as structural support for the cell module. A single wire is used to connect the cell modules that carries power, a voltage sample level, a serial data stream, indicating the temperature at a cell terminal to which the cell module is connected, and voltage level of each of the cells, as well as discharge current to equalize the charge of each of the cells. Various adapters can be used for different cell formats, which provide structural support for the cell modules. Reverse connection protection circuitry is also provided that protects the circuitry in the cell modules from accidental reverse connection.09-06-2012
20090236916POWER CONDITIONER - A reliable power conditioner in a system having three power sources: a direct-current power source such as a solar cell, an accumulating unit such as an accumulator, and a commercial power system.09-24-2009
20120235497METHOD OF CONTROLLING A BATTERY, COMPUTER READABLE RECORDING MEDIUM, ELECTRICAL POWER GENERATION SYSTEM AND DEVICE CONTROLLING A BATTERY - This method of controlling a battery storing electric power generated by a power generator generating electric power using renewable energy comprising, detecting a power output data at plural points in time during a specified period, the power output data being amounts of electric power generated by the power generator, computing a target output value for supplying to an electric power transmission system based on an average value of the power output data detected at the plural points, and supplying to the electric power transmission system electric power corresponding to the target output value from at least one of the power generator and the battery, wherein the average value is determined so that different weights are applied to the power output data detected at the plural points in calculating the average value.09-20-2012
20120235496POWER DISTRIBUTION UNIT AND METHOD OF DISTRIBUTING HIGH DENSITY POWER - A power distribution unit includes a first solid state power module comprising a first plurality of solid state power controllers, where the first solid state power module comprises a first set of power characteristics. Also included is a second solid state power module comprising a second plurality of solid state power controllers. The second solid state power module comprises a second set of power characteristics. Also, the first solid state power module and the second solid state power module are interchangeably coupled to a first location of a common chassis.09-20-2012
20120235495SUPPLY ENERGY ARRANGEMENT AND METHOD FOR PROVIDING A SUPPLY ENERGY - Supply energy arrangement comprising an input (E) to which an energy source (Q) is coupled, an output (A) for connection of a load (V), a first energy storage device (E09-20-2012
20130207476APPARATUS AND METHOD FOR VARIABLY CONTROLLING DISCONNECTION OF INTERCONNECTION LINES IN BATTERY SYSTEM - Disclosed are an apparatus and method for variably controlling the disconnection or connection of switch connections between battery units in a large battery system based on the degree of a sensed dangerous external situation to convert the battery system into a small capacity and low voltage state. The apparatus includes: switches provided to interconnection lines between battery assembly units to electrically connect or disconnect the interconnection lines; a switch control module adapted to apply on/off signals to the switches; and a disconnection control module adapted to control the switch control module based on a sensed dangerous level to vary the position and number of the target switches to be opened or closed and the disconnection intervals. According to the apparatus and method, dangerous external situations of a large battery system can be sensed and the disconnection of physical connections between the battery units can be variably controlled.08-15-2013
20110089763Battery Energy Source Arrangement And Voltage Source Converter System - The invention relates to power networks, and in particular to a battery energy source arrangement and voltage source converter system in such network. The battery energy source arrangement includes battery energy storage, having one or more parallel-connected battery strings and a mechanism for connecting a voltage of the battery strings to a load. The battery energy source arrangement further includes battery string voltage adapter devices connected in series with respective ones of the one or more battery strings wherein the battery string voltage adapter devices are designed to handle only a fraction of the voltage handled by the battery strings.04-21-2011
20090218887Systems for Highly Efficient Solar Power Conversion - A high efficiency photovoltaic DC-DC converter achieves solar power conversion from high voltage, highly varying photovoltaic power sources to harvest maximum power from a solar source or strings of panels for DC or AC use, perhaps for transfer to a power grid at high power levels with coordinated control possible for various elements. Photovoltaic DC-DC converters can achieve efficiencies in conversion that are extraordinarily high compared to traditional through substantially power isomorphic photovoltaic DC-DC power conversion capability that can achieve 97%, 98%, 99.2% efficiency, or even only wire transmission losses. Switchmode impedance or voltage conversion circuit embodiments may have pairs of photovoltaic power interrupt switch elements and pairs of photovoltaic power shunt switch elements to first increase voltage and then decrease voltage as part of the desired photovoltaic DC-DC power conversion.09-03-2009
20120286579ELECTRICAL POWER CONDITIONING UNIT AND SYSTEM - An electrical power conditioning for an electrical power conditioning system comprises a first terminal for connecting either an electrical power generator or a battery; a second terminal for connecting either a battery or an electrical power generator, respectively; a third terminal for connecting a power bus; characterized in that it further comprises: a reactive structure connected between said second terminal and the ground, formed by a serial connection of a first inductor, a capacitor and a second inductor, first and second nodes being provided between the first inductor and the capacitor, and between the capacitor and the second inductor, respectively; at least one output switching structure for connecting the third terminal to the first and second nodes through respective first and second switches and a third in-series inductor; and at least one input switching structure for connecting the first terminal to at least the first node through a third switch.11-15-2012
20110278936LOW DROPOUT REGULATOR WITH MULTIPLEXED POWER SUPPLIES - Generally, with low drop out (LDO) regulators that use multiplexed power supplies, the transistors within the regulator can use a substantial amount of area. Here, a regulator is provided that uses a multiplexer to commonly control the back-gates of multiple power transistors within the LDO. By doing this, the area overhead that would normally be present with these switches (of the multiplexer) can be dramatically reduced without sacrificing performance.11-17-2011
20110140534Power supply device and method - An object is to provide a duplex power supply for auxiliary machines. A power supply device includes a switching section that is connected to a direct-current link between a generator-side inverter and a grid-side inverter via an auxiliary machine power inverter for converting direct-current power supplied from the direct-current link into alternating-current power to form a first path, that is connected somewhere between a power-converting section and a utility grid to form a second path, and that is connected to auxiliary machines to form a third path, and the switching section switches between connection of the third path to the first path and connection of the third path to the second path.06-16-2011
20110127840POWER SWITCHING DEVICE AND METHOD THEREOF, AND PROJECTION DEVICE USING THE POWER SWITCHING DEVICE - A power switching device, a power switching method, and a projection device using the power switching device are provided. In the power switching method, a first power and a second power are received, and the voltage level of the first power is compared with the voltage level of the second power. One of the first power and the second power having the higher voltage level is sustained by using one of the first power and the second power having the lower voltage level until one of the first power and the second power having the higher voltage level stabilizes. At least one of the first power and the second power having the higher voltage level and being already stabilized is output as an output voltage.06-02-2011
20110298291LOAD DRIVING CIRCUIT AND LOAD DRIVING METHOD - A load driving circuit that generates a desired voltage waveform to drive a load includes a target voltage waveform output section that outputs a target voltage waveform to be applied to the load. Power supply sections generate electrical power with voltage values different from each other. Negative feedback control sections between the power supply sections and the load supply electrical power from the corresponding power supply sections to the load and execute negative feedback control of a value of a voltage applied to the load for matching the voltage value and the target voltage waveform. A power supply connection section selects one of the power supply sections based on the value of the voltage applied to the load or the voltage value of the target voltage waveform and connects the selected power supply section to the load and disconnects the rest of the power supply sections from the load.12-08-2011
20110298290SEMICONDUCTOR DEVICE - In one embodiment, to maintain the operation stability of a semiconductor device even when an external voltage changes. An input signal discrimination unit operates with a power supply potential supplied from a first power supply line VDDI. The input signal discrimination unit compares an input signal VIN with a reference potential Vref. The comparison result is inverted into a signal V12-08-2011
20110298289ELECTRONIC APPARATUS WITH PROTECTION CIRCUIT - An electronic apparatus includes a first power source input terminal configured to receive a first driving voltage or a second driving voltage, wherein the second driving voltage is greater than the first driving voltage; a second power source input terminal configured to receive the first driving voltage or the second driving voltage; a protection circuit connected to the first power source input terminal; a first voltage circuit connected to the protection circuit and driven by the first driving voltage; and a second voltage circuit connected to the second power source input terminal and driven by the second driving voltage; wherein the second driving voltage is blocked by the protection circuit and not further transmitted to the first voltage circuit while the second driving voltage is inputted to the first power source input terminal.12-08-2011
20120139348LOAD CONDITION CONTROLLED INLINE POWER CONTROLLER - In various embodiments, a power converter system that is configured to provide power to an electronic device is provided. The power converter system comprises a power converter and a power controller. The power converter is configured to condition power from a power source. The power converter is also be configured to transmit power to the electronic device. The power controller is configured to selectively or removably couple to the power converter between at least one of the power source and the electronic device. The power controller is also configured to disengage the power to the electronic device in response to the electronic device operating under a predetermined operating condition.06-07-2012
20110291487Indoor unit and method thereof and air conditioning system having the same - An indoor unit performs a control operation to not supply power to a load device through a power/communication line simultaneously with other indoor units. An air conditioning system may includes an indoor unit including a microcomputer to output a power application signal to supply power to a load device through a power/communication line, and a duplicate power application prevention unit to interrupt the power application signal from the microcomputer when the power is simultaneously applied to the power/communication line by a different indoor unit, to prevent the power from being duplicately applied to the power/communication line.12-01-2011
20100264742POWER SOURCE SYSTEM WITH CONTINUOUSLY ADJUSTABLE OUTPUT - An exemplary power source system includes a power source, controller, and a voltage fine adjusting unit. The power source includes a number of cells and a number of switches configured for connecting the cells in series or in parallel. The controller is configured for coarsely controlling an output of the power source by selectively turning on and off the switches. The voltage fine adjusting unit is configured for further and finely adjusting the output of the power source on condition that the coarsely controlled output of the power source is outside a predetermined acceptable range of output.10-21-2010
20100264740BATTERY SYSTEMS AND OPERATIONAL METHODS - This disclosure includes battery systems and operational methods. According to one aspect, a battery system includes conversion circuitry, a plurality of main terminals configured to be coupled with a load, a charger and a plurality of rechargeable battery modules which are coupled in series with one another intermediate the main terminals, switching circuitry configured to couple a first of the battery modules with an input of the conversion circuitry, and the conversion circuitry being configured to modify an electrical characteristic of electrical energy received from the first of the battery modules and to output the electrical energy having the modified characteristic to a second of the battery modules.10-21-2010
20090102290CONDITION ACTIVATED BATTERIES - A system measures a temperature condition of a component of a mobile communication device, determines a battery of the mobile communication device based on the measured temperature condition, activates the determined battery, activates a temperature management device connected to the battery, and manages the measured temperature condition of the component with the temperature management device.04-23-2009
20090102289Techniques for Selecting a Voltage Source From Multiple Voltage Sources - A technique for selecting a voltage source from multiple voltage sources includes receiving a first voltage at an input of a first inverter, which includes a first supply node coupled to a second voltage and a second supply node coupled to a common node. The second voltage is received at an input of a second inverter, which includes a third supply node coupled to the first voltage and a fourth supply node coupled to the common node. An output of the first inverter is coupled to the input of the second inverter and an output of the second inverter is coupled to the input of the first inverter. One of the first and second voltages is provided at an output node based on respective signal levels at the outputs of the first and second inverters.04-23-2009
20100033018ELECTRONIC EQUIPMENT AND CHARGING CONTROLLING METHOD - The present invention provides an electronic equipment capable of supplying an electric power to a secondary battery only when the secondary battery must be charged.02-11-2010
20090278408INTEGRATED DC POWER SYSTEM WITH ONE OR MORE FUEL CELLS - A power system has at least an AC power source, a DC power source, a transfer switch, at least one AC-DC rectifier, and a power distribution frame. The transfer switch is coupled to the AC power source and the DC power source. The at least one AC-DC rectifier is coupled to the transfer switch and has a boost regulator. A power distribution frame is coupled to the AC-DC rectifier.11-12-2009
20100102636NESTED REDUNDANT UNINTERRUPTIBLE POWER SUPPLY APPARATUS AND METHODS - An uninterruptible power supply (UPS) system includes at least three UPSs configured to be connected in parallel to a common load. The system further includes control circuitry configured to support at least two redundant groups among the UPSs and to support at least two redundant subgroups among at least one of the redundant groups of UPSs. In this manner, a nested redundancy may be provided.04-29-2010
20090189454Reference voltage generation circuit and start-up control method therefor - To solve the problem of the conventional reference voltage generation circuit in that an output voltage exceeds a predetermined voltage value, there is provided a reference voltage generation circuit including: a voltage generation circuit provided between a first power supply and a second power supply, to output an output voltage to an output terminal; an auxiliary start-up circuit provided between the output terminal and the first power supply, to supply a voltage of the first power supply to the output terminal; and a control circuit that switches the auxiliary start-up circuit between an operating state and a non-operating state according to a value of a voltage at the output terminal.07-30-2009
20090212635CHARGE COUPLING AND DECOUPLING CIRCUIT - A supplemental power supply includes output terminals configured to provide power to an external load, first input terminals configured to receive power from a first power supply, and second input terminals configured to receive power from a second power supply, the second power supply independent from the first power supply. Further, a charge coupling and decoupling circuit (CCDC) is electrically coupled to the output terminals and first and second input terminals, the CCDC configured to electrically couple one of the first input terminals or the second input terminals to the output terminals, and electrically couple or decouple the first input terminals from the second input terminals.08-27-2009
20090152953Hybrid Power Supply Apparatus with Fuel Cell Output Control - A hybrid power supply apparatus with fuel cell output control comprises: a first power supply circuit and a second power supply circuit, the first power supply circuit consisting of a first power unit, a first voltage conversion unit, a sensor unit, and a control unit, wherein the voltage conversion unit is connected to the power unit, and contains a DC voltage booster circuit or a DC voltage buck circuit to convert the DC power generated by the power unit into DC power of specific voltage for output; the sensor unit being able to detect the voltage or the current of DC power output by the first power unit that enables the control unit to control the DC power conversion ratio of the first voltage conversion unit or stop the DC power conversion by the first voltage conversion unit based on the electric signal fed from the sensor unit, thereby protecting the first power unit.06-18-2009
20090152952ELECTRIC POWER CONSERVATION SYSTEM - An electric power conservation system to be used between an AC utility power source and a load circuit in a home or business. The electric power conservation system comprises an energy charger component, a DC rechargeable energy source, an inverter unit, a bypass isolation circuit, a monitor and control unit, coil contactors and contacts, and necessary circuitry for supplying a load circuit with the power it requires. The invention reduces consumption of electric power from public utility companies, thereby decreasing the load on the national electrical grid. Where utility companies offer lower off-peak rates to consumers of electrical power, it becomes exceedingly desirable to have such a system in place, to save consumers money. During normal operations wherein normal utility power is available, the load circuit derives part of its power from the AC utility power source, and the remaining power that it requires from the electric power conservation system.06-18-2009
20080265683METHOD AND CIRCUIT TO OUTPUT ADAPTIVE DRIVE VOLTAGES WITHIN INFORMATION HANDLING SYSTEMS - A method and circuit to output adaptive drive voltages within information handling systems is disclosed. According to one aspect of the disclosure, a method of outputting power within an information handling system can include sensing a load current of a power output stage operable to employ more than one drive voltage level. The method can also include comparing the load current to a threshold current setting, and selecting a first output drive voltage from a plurality of input drive voltages in response to comparing the load current to the threshold current setting. The method can also include coupling the first output drive voltage to the power output stage.10-30-2008
20100244572CURRENT LIMIT SCHEME FOR DC-DC CONVERTERS - A current limit scheme for current-mode DC-DC converters. The current limit scheme is used to limit the current through the inductor during a current limit event. Current flows through the inductor alternately from first and second power devices, with one of said devices operating in the on-state while the other is in the off-state. The current through the second power device is sensed and tracked if the peak inductor current exceeds a particular value. The inductor current is regulated by modulating the on-time of the first power device that delivers current from the input voltage source to the output through the inductor. Thus, the modulator adjusts the on-time of the first power device using past and present information related to the current flowing through the second power device and the instantaneous output voltage of the converter to limit the peak inductor current from exceeding a maximum value.09-30-2010
20090309424LOAD DRIVING CIRCUIT AND LOAD DRIVING METHOD - A load driving circuit that generates a desired voltage waveform to drive a load includes a target voltage waveform output section that outputs a target voltage waveform to be applied to the load. Power supply sections generate electrical power with voltage values different from each other. Negative feedback control sections between the power supply sections and the load supply electrical power from the corresponding power supply sections to the load and execute negative feedback control of a value of a voltage applied to the load for matching the voltage value and the target voltage waveform. A power supply connection section selects one of the power supply sections based on the value of the voltage applied to the load or the voltage value of the target voltage waveform and connects the selected power supply section to the load and disconnects the rest of the power supply sections from the load.12-17-2009
20100001587PHOTOVOLTAIC DC/DC MICRO-CONVERTER - A photo-voltaic (PV) power generating system and a control system for PV array string-level control and PV modules serially-connected into strings of PV modules. The system includes plural parallel strings of serially-connected power-generating photovoltaic modules that form a PV array, DC/DC micro-converters that are coupled to a DC voltage buss and to the output of a corresponding photovoltaic module or to the output of a string of photovoltaic modules; a gating or central inverter; and a control system. The control system is structured and arranged to control and manage each string of photovoltaic modules, to ensure that power delivered by the photovoltaic power generating system is not affected by photovoltaic modules or strings of photovoltaic modules that are not operating at maximum power transfer efficiency.01-07-2010
20110062785SYSTEM AND METHOD FOR SUPPORTING HIGH BURST CURRENT IN A CURRENT LIMITED SYSTEM - A current limited system for providing a burst current capability comprises a variable load having a first mode of operation requiring a first current level and a burst current mode of operation requiring a second current level. The second current level is greater than the first current level. A control processor provides control signals for the current limited system. A voltage source is connected to the variable load to provide a source current. The source current provides the variable load the first current level in the first mode of operation. A burst mode circuit provides the second current level to the variable load in the burst current mode of operation, responsive to the control signals from the control processor and the voltage source.03-17-2011
20090206673ELECTRIC CIRCUIT DEVICE - According to an aspect of an embodiment, an electric circuit device includes: a first and second voltage supply units to be applied with a first and second voltages, respectively; a first capacitor connected to the first voltage supply unit; a first switch connected between the first voltage supplying unit and the first capacitor; a first load circuit connected to the second voltage supply unit; a second switch connected between the second voltage supply unit and the first load circuit; a third switch connected to connect the first capacitor with the first load circuit; and a switch controller for turning on either the third switch or the first switch, and for turning off the third switch while the second switch is turned on.08-20-2009
20100084923FUEL CELL SYSTEM - To provide a fuel cell system capable of efficiently transmitting electric power output from a battery to a load. A control unit 04-08-2010
20090284077MULTI-INPUT POWER-SWITCHING CIRCUIT - The present invention discloses a multi-input power-switching circuit, which comprises: more than one power input terminal, more than one detection/evaluation circuit, and a switching/controlling unit. A switch is arranged in the path via which the input power is received by the power input terminal and then transferred to the power conversion unit. Each detection/evaluation circuit receives a partial voltage signal from one input power and generates a detection signal according to the partial voltage signal. The switching/controlling unit receives the detection signals from the detection/evaluation circuits, determines which power input terminal has a higher voltage level according to the detection signals, and generates a turn-on signal to turn on the switch connected with the power input terminal having a higher voltage level. Thereby, the power conversion unit can acquire a higher voltage input power and provide a stable driving power for a load.11-19-2009
20100277000Efficiency Power Supply System Having A Redundant Supply That Remains Online While Sourcing No Current - Plural electric power supplies are connected in parallel to an output bus. The plural supplies include a primary power supply and a redundant switching power supply. The primary power supply is configured to provide output current to a load when the primary power supply is operating normally. The redundant supply is configured to remain online while not providing output current to the load when the primary power supply is operating normally, but to begin providing output current to the load when the primary power supply is not operating normally.11-04-2010
20110198935INVERTER FOR A THREE-PHASE AC PHOTOVOLTAIC SYSTEM - Various methods and apparatus are described for a photovoltaic system. In an embodiment, pluralities of three-phase Alternating Current (AC) inverter circuits electrically connect into a common three phase AC output. Each of those inverters receives a bipolar DC voltage supplied from its own set of Concentrated PhotoVoltaic (CPV) modules.08-18-2011
20130099577POWER MANAGEMENT SYSTEMS - A power management system includes a first switch, a second switch, and a controller coupled to the first and second switches. The first switch has a first transfer terminal. The second switch has a second transfer terminal. The controller controls power conversion by turning on a third switch periodically. The first and second transfer terminals and a third transfer terminal of the third switch are coupled to a common node. The resistance between the first transfer terminal and the common node, the resistance between the second transfer terminal and the common node, and the resistance between the third transfer terminal and the common node are substantially equal to zero.04-25-2013
20130099578METHOD OF OPERATING A MOBILE DEVICE, APPARATUS AND WIRELESS DEVICE - A method of operating a mobile device, an apparatus and a wireless device are provided. The method of operating a mobile device comprises receiving an external supply voltage, converting the external supply voltage into an operating voltage and operating a circuit with the operating voltage. The method may include disconnecting a rechargeable battery from the operating voltage. The method may include charging a rechargeable battery in a trickle charge manner or in a continous manner depending on a battery voltage. An apparatus is configured to carry out the method. The method may be used by a wireless device.04-25-2013
20090295230Selective coupling of a powered component - An apparatus includes a switch controllable selectively to couple a powered component to a battery output connection or to a battery bypass circuit coupled to a charging input.12-03-2009
20090127935POWER SUPPLY SYSTEM AND PROTECTION METHOD - A power supply system for an electronic device includes a first and a second connector, a switch, and a controller. The first connector is used for connecting to a first power source. The second connector is used for connecting to a second power source, wherein the second power source is rechargeable. The switch establishes a connection between the first connector and the second connector so as to allow the first power source to charge the second power source. The controller detects a presence of the first power source and the second power source, and controls the switch to periodically establish the connection at the absence of the second power source, and to continuously establish the connection at the presence of the second power source.05-21-2009
20090009004BOOSTING CIRCUIT AND INTEGRATED CIRCUIT HAVING THE SAME - In a boosting circuit, a power supply section includes a first power supply configured to supply a first reference voltage and a second power supply configured to supply a second reference voltage. A boosting section includes boosting switches and boosting capacitors, and is configured to generate a boosted voltage to an output node by using the boosting switches and the boosting capacitors in response to the first reference voltage and the second reference voltage. A switching circuit is configured to connect the output node and one of the first power supply and the second power supply based on a difference between the first reference voltage and the second reference voltage.01-08-2009
20090261657METHOD AND SYSTEM OF HYBRID POWER MANAGEMENT - A method of hybrid power management is provided in the present invention, comprising steps of: providing a hybrid power output device being coupled to a load and comprising a fuel cell module and a secondary cell module; determining a plurality of threshold values, each representing one of output power modes of the hybrid power output device respectively; and monitoring a characteristic value output from the fuel cell module and comparing the characteristic value with the threshold values to determine one of the output power modes to supply power to the load. Moreover, the present invention further provides a system of hybrid power management using the foregoing method to control switches to select from the output power modes such as supplying power from the fuel cell module only, from both the fuel cell module and the secondary battery, or cutting off power supply to the load according to the power state of the fuel cell module.10-22-2009
20090261656Power system for mobile workstation and method - A power system for a mobile workstation includes a docking station for a removable battery, a power bus, and a power interface having an output interface electrically connected with the power bus. The power system further includes a detector configured to detect user interaction with a removable battery docked with the docking station, and a switching device coupled with the detector and configured to switch the power interface from a first power sourcing mode to a second power sourcing mode receiving power from a back-up battery, in response to detecting user interaction with a removable battery docked with the docking station.10-22-2009
20090039709ELECTRONIC DEVICE CAPABLE OF AUTOMATICALLY SELECTING A POWER SOURCE - An exemplary electronic device capable of automatically selecting a power source includes two power ports configured to connect to external power sources and a battery compartment configured to receive a battery module. The voltage of the battery module is higher than at least one of the external power sources. The electronic device further includes a power selection module allocated between the battery module and the power port which selects the lower voltage. Three diodes are respectively located on the output path of the three power sources. A path switch that controls whether power to the device comes from the battery compartment or a power port is located between the anode of the battery compartment and the diode located on the output path of the battery module. Among the multiple power sources, the external power source providing a higher voltage is the first to be chosen to power the electronic device.02-12-2009
20100127572UTILITY-INTERACTIVE INVERTER SYSTEM ARCHITECTURE AND METHOD OF OPERATION THEREOF - Electrically powered equipment and a method of powering the equipment. In one embodiment, the equipment includes: (1) an electric power consuming apparatus, (2) a mains input coupled to the apparatus and configured to be coupled to a branch circuit extending from a distribution panel and allow electric power from the branch circuit to flow to the apparatus and (3) a grid-tied power source input at least intermittently couplable to the mains input and configured to receive electric power from at least one premises power source and allow the electric power to flow to the apparatus or the distribution panel. In a more specific embodiment, the equipment is an outdoor unit.05-27-2010
20080246341POWER SUPPLY SELECTION FOR MULTIPLE CIRCUITS ON AN INTEGRATED CIRCUIT - An integrated circuit comprising a plurality of circuits is provided. The integrated circuit further comprises a plurality of power circuits, wherein each of the plurality of power circuits can supply a selected voltage to at least one of the plurality of circuits.10-09-2008
20110266877APPARATUS FOR SUPPLYING VOLTAGE FREE NOISE AND METHOD OF OPERATION THE SAME - A voltage supply apparatus includes a power noise sensing unit, a voltage selecting unit, a first power voltage supply unit and a second power voltage supply unit. The power noise sensing unit senses noise from first and second powers and outputs a power noise sensing signal. The voltage selecting unit outputs first and second driving signals in response to a voltage-supply-enable-signal and the power noise sensing signal. The first power voltage supply unit applies a voltage of the first power in response to the first and second driving signals. The second power voltage supply unit applies a voltage of the second power in response to the first and second driving signals.11-03-2011
20100201199Power conversion device - A power conversion device includes a combination of at least one power supply, a power converter, an inverter, a converter, an AC power circuit, a power output selection device, and a control unit. The at least one power supply is converted by the inverter and the converter to provide an output of AC power or DC power connected to the power output selection device and the control unit is used to effect control of the distribution of input power supplies in the conversion of power and to ensure power output of the power output selection device so that the present invention allows for timed management and distribution of power flows for the AC power outputs from the electric main and the inverter in order to provide stable AC power output and provide DC power outputs of different voltage levels for powering various electric appliances.08-12-2010
20100201198LOW- VOLTAGE DUAL POWER LOOP DEVICE AND METHOD - The present invention relates to a low-voltage dual power loop device and method, comprising a first power supply, a second power supply and a dual power control loop, wherein the first and second power supplies provide power input to the dual power control loop, which contains the first and second control chips connected with a power detection loop, a power comparison loop and a power switch loop respectively. The first and second control chips can detect the priority of the first and second power supplies by using the power detection loop. When a power outage happens to the power supply of the first priority, it will compare the voltages by using the power comparison loop and switch over from the power supply of the first priority into the standby power supply of the second priority by using the power switch loop, so that the standby power supply continues electricity supply to external electronic equipments, avoiding losses of important data in these equipments, which may result in heavy economic losses.08-12-2010
20090167094VOLTAGE ADJUSTING CIRCUITS AND VOLTAGE ADJUSTING METHODS - A voltage adjusting circuit is provided. The voltage adjusting circuit for adjusting the output voltages supplied by voltage sources includes a test control device, a multiplexer, a comparator, and a built in self test (BIST) device. The test control device selects one of the voltage sources as a testing voltage source, and outputs a selecting command for selecting the testing voltage source and a target voltage corresponding to the testing voltage source. The multiplexer is coupled to the voltage sources, receives an enablement signal, and outputs a voltage supplied by the testing voltage source as a testing voltage according to the enablement signal. The comparator compares the voltage levels of the testing voltage and the target voltage, and outputs a comparison result. The BIST device receives the selecting command, outputs the enablement signal for enabling the testing voltage source according to the selecting command, and adjusts the voltage supplied by the testing voltage source to a predetermined voltage according to the comparison result.07-02-2009
20080284250Power supply device, operation method of power supply device, electronic apparatus, and operation method of electronic apparatus - A power supply device that switches one of a first power supply, a second power supply, and a third power supply, all of which supply power to an auxiliary device, to a transfer gate in a CMOS image sensor having a photodiode and outputs the corresponding power to the transfer gate is disclosed. The device includes: a first transistor driven by the second power supply and outputting power of the second power supply to the transfer gate; a second transistor driven by the second power supply and outputting power of the first power supply to the transfer gate; a third transistor driven by the third power supply and outputting power of the third power supply to the transfer gate; and a fourth transistor located before the second transistor, driven by the first power supply, and outputting power of the first power supply to a source of the second transistor.11-20-2008
20080290734Switching pulse generating circuit and regulator using the same - A switching pulse generating circuit includes: a load current setting portion to determine the amount of current flowing through a load based on a load current setting signal, the load current setting signal being externally supplied to the load current setting portion, the load current setting signal specifying the amount of current flowing through the load; and a pulse generating portion to output voltage supplying pulses, the output voltage supplying pulses supplying voltage to the load, the pulse width of the voltage supplying pulses being determined based on the load current setting signal.11-27-2008
20080284251Voltage selection circuitry - Techniques, systems and apparatus are described for providing a voltage selection circuitry and a DC-to-DC converter having such voltage selection circuitry. The voltage selection circuitry includes a first terminal voltage sensing unit that senses a voltage of a first terminal and a second terminal voltage sensing unit that senses a voltage of a second terminal. The voltage selection circuitry also includes a comparison unit connected to the first terminal voltage sensing unit and the second terminal voltage sensing unit. The comparison unit compares the voltage of the first terminal with the voltage of the second terminal and outputs a comparison signal indicating a difference between the sensed voltages of the first and second terminals. The voltage selection circuitry includes a selection unit that selects a higher voltage from the sensed voltages of the first and second terminals in response to the comparison signal.11-20-2008
20090033155SEMICONDUCTOR INTEGRATED CIRCUITS - A semiconductor integrated circuit includes a first power source wiring line (VDD02-05-2009
20120043821ELECTRONIC DEVICE AND METHOD OF CONTROLLING POWER SUPPLY THEREIN - Disclosed is an electronic device, which includes an external power supply unit configured to receive power from an external power source and an auxiliary power storage unit configured to be charged upon receiving the power from the external power supply unit and store the power. The electronic device further includes a first switching element connected to the external power supply unit and the auxiliary power storage unit, the first switching element configured to select any one of the external power supply unit and the auxiliary power storage unit as a power source, a power information receiver configured to receive power information including at least one of electric rate information and power demand information, and a controller configured to control the first switching element based on the power information received from the power information receiver.02-23-2012
20100264741ADAPTATION OF AN ACTIVE POWER SUPPLY SET USING AN EVENT TRIGGER - A method and systems of adaptation of an active power supply set using an event trigger are disclosed. In an embodiment, a method includes providing power to a system load using an active power supply set. The active power supply set includes a power supply in an active mode. The method also includes detecting an event trigger. In addition, the method includes increasing a power mode of an additional power supply when the event trigger is detected. The method may include detecting an additional event trigger and decreasing the power mode of a unit of the active power supply set when the additional event trigger is detected.10-21-2010
20100264739Modular adaptive power matrix - A modular adaptive power management center integrating control and management of multiple electrical power sources such as locally generated solar or wind power, connections to an electrical utility service provider, battery power, and others. The system increases system efficiency by monitoring load requirements and matching available power sources in real time. A wall mounted rack system houses a system backplane and a main system microprocessor. The backplane accepts plug-in power modules including power converters each dedicated to managing one of various energy sources such as local wind or solar sources, as well as utility grid connections and battery backup systems. The system also includes a backup battery bank and a battery power module to control charge/discharge activity of the batteries. A variety of user interfaces are provided including via a local LCD display, LED indicators, and remote access and monitoring through an Internet connection and browser window. The modular nature of the design allows a homeowner/user to “plug-in” additional modules as new power sources become available.10-21-2010
20090146499POWER SUPPLY SWITCHING CIRCUIT - In a power supply switching circuit, a transistor that switches to a highest voltage is formed of an enhancement type PMOS transistor, and transistors that switch other voltages are each formed of a depletion type NMOS transistor. A signal for controlling a gate of each of the transistors is input through a level shifter. The depletion type NMOS transistor does not operate in a bipolar manner even if a source voltage thereof reaches a power supply voltage VPP06-11-2009
20130119771Methods and Systems for a Reliable Automatic Reserve Battery Switch - Systems and methods according to these exemplary embodiments provide for a circuit for switching from a first battery to a second battery. The circuit includes: the first battery configured to provide electrical energy to a device when a first reed switch is closed; the second battery configured to provide electrical energy to the device when a second reed switch is closed; the first reed switch electrically connected to the first battery and configured to close when proximate a magnet; the second reed switch electrically connected to the second battery and configured to close when proximate the magnet; and the magnet configured to be moved from a position proximate the first reed switch to a position proximate the second reed switch.05-16-2013
20090115253METHODS AND APPARATUSES FOR SELECTABLE VOLTAGE SUPPLY - A circuit which selects a supply voltage from a plurality of voltage supplies is presented. The circuit includes a first transistor configured to select a first voltage supply, a second transistor configured to select a second voltage supply, a first parasitic current inhibitor coupled the first transistor, the first voltage supply, and the second voltage supply, where the first parasitic current inhibitor automatically utilizes the voltage supply providing the highest voltage for preventing a substrate current from flowing through a bulk node of the first transistor, and a second parasitic current inhibitor coupled the second transistor, the first voltage supply, and the second voltage supply, where the second parasitic current inhibitor automatically utilizes the voltage supply providing the highest voltage for preventing a substrate current from flowing through a bulk node of the second transistor.05-07-2009
20120104860POWER SUPPLY DEVICE FOR NETWORK ATTACHED STORAGE - A power supply device for a network attached storage (NAS) is connected to both a power over Ethernet (POE) system and a direct current (DC) power supply. A control unit of the power supply device receives a voltage provided by the POE system and a voltage provided by the DC power supply, and compares the two voltages with each other. When the voltage provided by the DC power supply equals or is greater than the voltage provided by the POE system, the control unit inputs electric power of the DC power supply to the NAS and prevents electric power of the POE system from being input to the NAS. When the voltage provided by the DC power supply is less than the voltage provided by the POE system, the control unit allows electric power of the POE system to be input to the NAS.05-03-2012
20090174261REDUNDANT POWER SUPPLY SYSTEM - An exemplary redundant power supply system includes a first power supply, a second power supply, a first sensor, a control circuit, and a relay switch. The control circuit includes a first input terminal connected to the first power supply via a first sensor to receive a status signal of the first power supply, a first NOT gate, a delay circuit connected to the first input terminal via the first NOT gate, a first output terminal sending a first control signal, and a second output terminal sending a second control signal. The relay switch configured to receive the two control signals from the two output terminals of the control circuit, and select the first power supply or the second power supply to supply power to an electronic device according to the two control signals.07-09-2009
20090184584Circuit arrangement having a power supply unit - The circuit arrangement has a power supply unit, a mains switch and a switching element, for example a relay, that bridges a first switching contact of the mains switch. A load is coupled to a control terminal of the switching element, so that when the control voltage is turned off for the purpose of opening the switching element, the load is simultaneously turned off. The circuit arrangement contains a microprocessor, in particular, which is supplied with an operating voltage by the power supply unit, and which is coupled to the control terminal of the switching element for control of the switching element. The load is a fan, for example, which is switched off in a delayed manner when the circuit arrangement is switched off by means of the mains switch.07-23-2009
20120068545ENERGY STORAGE SYSTEM - An energy storage system includes a plurality of battery units; a plurality of thermistors detecting a temperature of the plurality of battery units; a multiplexer performing multiplexing on the plurality of thermistors, and connecting a thermistor selected from among the plurality of thermistors to a reference resistor; a power switch unit arranged between the reference resistor and a power voltage terminal; and a control signal input unit receiving a control signal applied to the multiplexer and the power switch unit, and receiving two or more control bits contained in the control signal. In the energy storage system, a temperature measurement operation is performed at a plurality of measurement positions, whereby a current state of a battery may be accurately detected, an entire circuit may be reduced and simplified, and low power consumption may be realized.03-22-2012
20090051223METHOD OF CONTROLLING BATTERY POWER, POWER CONTROL APPARATUS, AND PORTABLE DEVICE USING THE SAME - A method for controlling batteries, a power control apparatus, and a portable device using the same are provided. Based on a connection status of a main battery and an auxiliary battery and the relative magnitudes of voltage of the main battery and the auxiliary battery, supplying of electric power from the main battery or an integrated power source integrating the main battery voltage with the auxiliary battery voltage, recharging of the main battery and the auxiliary battery respectively or simultaneously, and the connection between the main battery and the auxiliary battery when the portable device is turned off are controlled so that electric power of the portable device using a plurality of batteries can be effectively supplied.02-26-2009
20080238209IMAGE FORMING APPARATUS - An image forming apparatus according to an aspect of the invention is operable in a first mode in which a first unit group comprising at least one of a plurality of functional units is activated and a second mode in which a second unit group comprising at least one of the plurality of functional units is activated. In the first mode, a control unit is operable to: activate a first power source circuit; input a first voltage to a third power source circuit; and supply an operation voltage converted by the third power source circuit to the first unit group. In the second mode, the control unit is operable to: activate a second power source circuit and deactivate the first power source circuit; and supply a second voltage output from the second power source circuit to the second unit group without intervention of the third power source circuit.10-02-2008
20090200871Electronic Device, Computer, Arrangement, and Method for Controlling Electronic Device - An electronic device (08-13-2009
20110140533ASSIGNING ADDRESSES TO MULTIPLE CASCADE BATTERY MODULES IN ELECTRIC OR ELECTRIC HYBRID VEHICLES - According to one aspect there is disclosed an apparatus. The apparatus may include a first battery module. The first battery module may include a switch configured to open or close a first current path from a first terminal of a battery to a second terminal of the battery when a second battery module is coupled to the first battery module; a current sensor configured to sense a current in a second current path, the second current path different from the first current path; and a local controller configured to control a state of the switch to open or close the switch, wherein closing the switch is configured to close the first current path, the local controller is further configured to detect the sensed current in the second current path, and the local controller is further configured to receive and store an identifier based at least in part on the current detected in the second current path.06-16-2011
20120299385POWER SUPPLY SYSTEM WITH VARIABLE SUPPLY VOLTAGE - A power supply system with a variable supply voltage is provided. The power supply system includes a power adaptor, a battery unit, a switching circuit, and a main equipment. The power adaptor is suitable for producing a power voltage. The switching circuit selects the power adaptor or the battery unit for powering the main equipment. Wherein, the power adaptor adjusts the power voltage according to whether the battery unit performs a charge operation.11-29-2012
20130214606ELECTRONIC DEVICE AND POWER-SOURCE DEVICE - Electronic device comprising: processing unit including accepting part accepting processing request from external device and executing process specified by request; secondary battery connected with external power source; and power-source device transitioning to operating state when request is accepted in waiting state, and transitioning to waiting state when processing unit completes executing process, wherein, in waiting state, power supply from external power source to processing unit is stopped and secondary battery supplies power to accepting part, and in operating state, power is supplied from external power source to processing unit. Power-source device includes controller executing first charge control operation to cause external power source to charge secondary battery when, in operating state, voltage of secondary battery is not higher than threshold, and end executing first charge control operation when transitioning to waiting state, controller updating threshold in response to increase in number of times first charge control operation is executed.08-22-2013
20090200870POWER SUPPLY UNIT - A power supply unit includes a main power-supply circuit and a secondary power-supply circuit which are connected to an alternating current power supply AC. The main power-supply circuit includes a full-wave rectifier and an input current control circuit corresponding to a harmonic current suppression circuit. The input current control circuit includes a resistor as circuit current detection element and a control circuit for controlling a switch element by detecting a current flowing in the resistor. A connection is provided such that a current flowing in a diode as a second rectifying circuit of the secondary power-supply circuit may return to the alternating current power supply through the resistor.08-13-2009
20090243393SEMICONDUCTOR DEVICE, DESIGNING METHOD AND DESIGNING APPARATUS OF THE SAME - A designing method of a semiconductor device includes: changing a power supply voltage changing a design data of a semiconductor device with a first power supply voltage into a design data of a semiconductor device with a second power supply voltage which is lower than the first power supply voltage; performing a first static timing analysis detecting the timing error by performing a static timing analysis process based on the delay time of the semiconductor device with the second power supply voltage; and supplying a power supply voltage generating the design data to supply the first power supply voltage to power supply voltage lines of the cell blocks in which cells on paths where the timing errors are detected are included, and to supply the second power supply voltage to the power supply voltage lines of the other cell blocks.10-01-2009
20120267958CURRENT SUPPRESSION CIRCUIT AND ELECTRONIC DEVICE EMPLOYING THE SAME - A current suppression circuit for an electronic device and includes a main power supply and a standby power supply. The current suppression circuit includes a voltage comparator and an electronic switch. The voltage comparator includes a non-inverting input, an inverting input, and an output. The non-inverting input and the inverting input are respectively connected to the main power supply and the standby power supply, and the output is connected to the electronic switch. Whether the electronic switch is turned on or off by virtue of by the voltage comparator, such that when the electronic device itself is powered off, the comparator outputs a voltage signal to the electronic switch to turn it off, and the standby power supply is disconnected from the components.10-25-2012
20100259106SWITCHING CONTROL METHOD CAPABLE OF CONTINUOUSLY PROVIDING POWER AND RELATED APPARATUS AND POWER SUPPLY SYSTEM - A switching control method capable of continuously providing power is utilized for a power supply system having a first power supply unit and a second power supply unit. The switching control method includes generating a first input signal and a second input signal; performing a logical operation process on the first input signal and the second input signal to generate a first control signal; delaying the second input signal for a delay time to generate a second control signal; controlling a coupling relationship between the first power supply unit and a load according to the first control signal; and controlling a coupling relationship between the second power supply unit and the load according to the second control signal.10-14-2010
20100164292APPARATUS, SYSTEM, AND METHOD FOR REDUCING POWER CONSUMPTION ON DEVICES WITH MULTIPLE POWER SUPPLIES - A load module determines that a load of an electronic device is operating at a power level below a predetermined power threshold. The electronic device is configured to receive power simultaneously from two or more redundant power supplies. Each redundant power supply configured to receive input power from one or more power sources and configured to provide regulated output power to the load of the electronic device. A disconnection module disconnects at least one of the two or more redundant power supplies from the one or more power sources in response to the load module determining that the load of the electronic device is operating at a power level below the predetermined power threshold07-01-2010
20130214605LINEAR AUTOMATIC TRANSFER SWITCH AND SWITCHING MEANS - A transfer switch including: a bus bar; a track parallel to the bus bar; a first power source connection proximate to the track; a second power source connection proximate to the track offset along the track from the first power source connection; a conductive core slidably coupled to the track, wherein the core includes a deformable array of conductive sections and the array includes contacting surfaces on opposite sides of the array; wherein the conductive core has a first position providing a conductive coupling between the bus bar and the first power source and a second position providing a conductive coupling between the bus bar and the second power source.08-22-2013
20100181839Semiconductor device - A semiconductor device includes two functional circuits, PMOS transistors and NMOS transistors. The PMOS transistors control whether or not a power supply potential is to be delivered to functional circuits, and the NMOS transistors control whether or not a power supply potential GND is to be delivered to the functional circuits. An external terminal supplied with a third power supply potential and another external terminal is supplied with a fourth power supply potential higher than the third power supply potential. A power supply control circuit delivers a control signal, having the fourth power supply potential as amplitude, to transistors to control the electrically conducting state or the electrically non-conducting state of transistors. The power supply control circuit also delivers a control signal, having the third power supply potential as amplitude, to transistors to control the electrically conducting or non-conducting state of the NMOS transistors.07-22-2010
20100244574CHARGING DEVICE, CHARGING SYSTEM AND CHARGING METHOD - There is provided a charging device including: a charging unit that charges plural secondary batteries that supply electric power to a portable radiation imaging device, each of plural secondary batteries being able to be installed in or removed from the portable radiation imaging device; a detecting unit that detects an extent of deterioration of each of the secondary batteries; a selecting unit that selects a secondary battery to be installed in the portable radiation imaging device such that, the smaller a planned number of images to be captured by the portable radiation imaging device, the higher the frequency of selection of a secondary battery, whose extent of deterioration is high, becomes; and an indicating unit that indicates the secondary battery selected by the selecting unit.09-30-2010
20100207454DC PLANT CONTROLLER AND METHOD FOR SELECTING AMONG MULTIPLE POWER SOURCES AND DC PLANT EMPLOYING THE SAME - Various embodiments of a DC plant controller, methods of selecting among multiple power sources and DC plants incorporating the DC plant controller or the method. In one embodiment, the DC plant controller includes: (1) a source identifier configured to identify power sources couplable to a common DC bus, (2) a source prioritizer coupled to the source identifier and configured to prioritize the power sources based on at least one criterion and (3) an output characteristic assigner coupled to the source prioritizer and configured to assign output characteristics to the power sources that differ from one another as a function of the priority.08-19-2010
20100219691SUPPLY VOLTAGE SELECTOR - An active diode includes a plurality of transistors that implement a built-in offset voltage. The built-in offset voltage size can be determined by sizing of at least one of the plurality of transistors to prevent supply current flow from one supply source into another supply source, thereby preventing current flow from a higher voltage source to a lower voltage source.09-02-2010
20100141040AUTO-SWITCHING DUPLEX MODULE - A system and method (“utility”) for providing power to an electrically powered device from alternate, redundant power sources via a single power cord. The utility is operable to provide redundant power to an electrical device having a power cord terminating in a standard plug. The utility is operable to sense a loss of power quality from one power source, and to switch a connection to another power source in response to the loss. The utility may be configured to match the form factor of a standard (e.g., NEMA or other electrical standard) duplex receptacle unit. The utility may be incorporated into a standard outlet box or may plug into a standard outlet box.06-10-2010
20090267419METHOD FOR SMOOTHING ALTERNATING ELECTRIC CURRENT FROM A NUMBER OF POWER GENERATING UNITS AND WIND POWER PLANT INCLUDING A NUMBER OF WIND MILLS WITH VARIABLE ROTATIONAL SPEED - A method and a wind power plant are provided for smoothing alternating electric current from a number of power generators. Generators are electrically connected to an electric network. Each power generator includes a transformer with pulse width modulation for converting direct current to pulse width modulated alternating current for feeding to the network. The time for feeding the pulses of the pulse width modulated alternating current is different for each generator in order to achieve a more even alternating current as a sum of respective outputs of alternating current from the generators.10-29-2009
20090179499MULTIPLE BI-DIRECTIONAL INPUT/OUTPUT POWER CONTROL SYSTEM - A multiple bi-directional input/output power control system includes a network of functional blocks housed in a single enclosure, providing DC power to one or more DC loads, and providing control and internal pathways, sharing one or more AC and/or DC power inputs. The system feeds back AC power from the DC power source into an AC input connection, and the fed-back AC power is shared by other AC loads. The system operates at least one alternative source of DC in a dynamic manner, allowing maximization of power generating capability at respective specific operating conditions of the moment. Power isolation may be handled by an AC isolation block right at a power input. Therefore all other blocks within a multi-function power control unit (MFPCU) are isolated from AC ground.07-16-2009
20090072625ELECTRIC POWER SUPPLY SYSTEM - In an electric power supply system, a plurality of batteries (03-19-2009
20110109166ELECTRIC POWER SUPPLY SYSTEM - In an electric power supply system, a plurality of batteries (05-12-2011
20090102291Fuel-Cell Based Power Generating System Having Power Conditioning Apparatus - A power conditioner includes power converters for supplying power to a load, a set of selection switches corresponding to the power converters for selectively connecting the fuel-cell stack to the power converters, and another set of selection switches corresponding to the power converters for selectively connecting the battery to the power converters. The power conveners output combined power that substantially optimally meets a present demand of the load.04-23-2009
20100295376SYSTEMS AND METHODS FOR DYNAMIC POWER ALLOCATION - Disclosed herein are systems and methods for providing power to a load. Systems according to the present embodiment may include an electrical generator to generate electrical power and a battery to store electrical power. The present disclosure may be applied to electrical power generators having variable outputs, and may be utilized to provide a more constant electrical output by drawing power from the electrical generator and the battery as necessary to satisfy the power requirements of the electrical load. The system draws power from the electrical power generator and the battery to satisfy the power requirements of the load. Based on a mode of operation, the system may draw power only from the battery, only from the electrical power generator, or from both the electrical power generator and the battery alternately.11-25-2010
20110001362METHOD OF CONTROLLING A POWER FACTOR CORRECTION STAGE, A POWER FACTOR CORRECTION STAGE AND A CONTROLLER THEREFOR - In order to improve the efficiency of a Power Factor Convertor (PFC) first stage to a AC-DC converter the switching cell is split into two smaller ones (each comprising a switched inductor with an output diode). Below a certain load only one cell is active. The second cell only becomes active, out of phase with the first, but not generally in antiphase, after a predefined load level is surpassed in such a way that above that level the first cell has a fixed on time and the second cell a variable one.01-06-2011
20090066162On-chip power supply voltage regulation - An integrated circuit (03-12-2009
20110025130SYSTEMS AND METHOD FOR LIMITING MAXIMUM VOLTAGE IN SOLAR PHOTOVOLTAIC POWER GENERATION SYSTEMS - Apparatuses and methods are disclosed for regulating or limiting the voltage output from solar modules connected in series such that the voltage on a string bus connecting those solar modules does not exceed regulatory or safety limitations. This can be accomplished via a controller, local management units (for downconverting solar module voltage output), or a combination of the two.02-03-2011
20110043044Generating System Using Solar Energy and Wind Power - A generating system includes a first generating device (02-24-2011
20100164294Power source switching apparatus and method thereof - A power source switching apparatus and method thereof are provided. The example power source switching apparatus may include a battery storing charges received from an external power source and outputting a voltage corresponding to the stored charges, a voltage adjuster outputting a first power source voltage having a voltage level, corresponding to the output voltage of the battery, during an external power source mode where the battery is being charged, the first power source voltage based at least in part on the external power source and the output voltage of the battery, a controller outputting a first control signal and a second control signal, the first control signal enabled if the battery is operating in the external power source mode and the second control signal is enabled if the battery is not operating in the external power source mode, a first switch outputting the first power source voltage if the first control signal is enabled and a second switch outputting the output voltage of the battery if the second control signal is enabled. In an example method, a first power source voltage may be provided if a battery is not being charged by an external power source voltage, the first power source voltage output by the battery. A second power source voltage may be provided if the battery is being charged by the external power source voltage, the second power source voltage corresponding to a voltage level of the first power source voltage and not provided from the battery.07-01-2010
20110133562LEVEL SHIFTER - According to one embodiment, a level shifter includes a transmission circuit and a controller. The transmission circuit is connected between a first circuit operating at a first power source voltage and a second circuit operating at a second power source voltage higher than the first power source voltage. The transmission circuit includes a first switch element receiving a signal input to one terminal and outputting the signal to another terminal. The first or second power source voltage is supplied to the another terminal of the first switch element via a resistance element and the controller supplies the another terminal of the first switch element with a current in an identical direction to a current flowing from the resistance element when the first switch element is switched to an OFF state.06-09-2011
20120068546POWER SUPPLY UNIT AND ITS CONTROL DEVICE - A control device is provided that includes a power supply unit. First and second MOSFETs are serially connected to a sub power supply line in the power supply unit by connecting their respective drains to one another. Third and fourth MOSFETs are serially connected to a sub power supply in a control unit by connecting their respective drains to one another. By controlling these MOSFETs, power of the sub power supply is supplied to a load. The drain voltage of each MOSFET, and the voltage between the second MOSFET and the third MOSFET are monitored to determine a short-circuit fault and an open-circuit fault of the MOSFET, and a ground fault in the sub power supply line between the power supply unit and the control unit.03-22-2012
20100072820ELECTRONIC DEVICE WITH POWER CONNECTION MODULE - An electronic device includes a first power supply unit, a second power supply unit, and a control circuit. The control circuit connected between the first power supply unit and the second power supply unit is configured for detecting an output power of the first power supply unit, and comparing the output power with a rated power of the first power supply unit. When the output power exceeds the rated power of the first power supply unit, the control circuit allows the second power supply unit to power the electronic device.03-25-2010
20110101785METHOD AND APPARATUS FOR MAINTAINING UNINTERRUPTIBLE POWER SUPPLIES - A system and method of isolating an uninterruptible power supply system is disclosed that comprises bypassing an inverter section of the power supply to couple primary power to a load bus; and, thereafter, isolating the power supply by simultaneously uncoupling the power supply from the load bus and coupling the primary power to the load bus.05-05-2011
20110101784Hybrid Wind-Solar Inverters - Certain embodiments of the invention may include systems and methods for providing a hybrid wind-solar inverter. According to an exemplary embodiment of the invention, a method for directing power from alternative power sources to an electrical grid is provided. The method can include: receiving at least two input DC power signals from a plurality of power sources; receiving one or more control signals from the electrical grid; directing, based at least in part on the one or more control signals, at least some of the input DC power signals to an output DC power signal; and, transforming the output DC power signal to an output AC power signal for transmission via the electrical grid.05-05-2011
20100231052POWER SUPPLY DEVICE - A power supply device for supplying power to an electronic device with an electronic tag includes a rectifying and voltage dividing apparatus, a power supply output module, a radio frequency identification (RFID) induction antenna, an RFID information processing module, and a control apparatus. The rectifying and voltage dividing apparatus is configured to rectify and divide an alternating current voltage to output a plurality of divided voltages. The RFID induction antenna is configured to receive information stored in the electronic tag. The RFID information processing module is configured to pick up a charging voltage value from the received information of the RFID induction antenna. The control apparatus is configured to compare the divided voltage values with the charging voltage value, and choose a divided voltage that equals to the charging voltage to provide to the electronic device.09-16-2010
20100244573HYBRID POWER DELIVERY SYSTEM AND METHOD - A power control circuit includes a selector coupled to a first power source and a second power source. The selector selects power from the first power source for powering a load based on a status signal from at least the first power source. The first power source may be an environmental power source and the second power source may be another type of power source.09-30-2010
20100244571SYSTEM AND METHOD FOR CHANGING POWER STATES OF A POWER DEVICE - Aspects in accord with the present invention are directed to a system or method for changing power states of an uninterruptible power supply. In one aspect, the present invention features a method of monitoring a power state of a power device. The method may comprise receiving from one of a plurality of sources a request to change the power state of the power device, initiating a change of power state based on the request, logging an identity of the one of the plurality of sources requesting the change of power state, a type of change of power state, and a time of change of power state, and communicating through a user interface the identity of the one of the plurality of sources requesting the change.09-30-2010
20110018351HIGH BANDWIDTH POWER SUPPLY SYSTEM WITH HIGH EFFICIENCY AND LOW DISTORTION - A power supply system uses improved Class G amplifier architecture for high bandwidth operation with low distortion. The power supply system switches between multiple power supply rails, depending on the signal level handled by the power supply system. The lowest usable supply rail voltage is chosen to minimize power dissipation in the output driver, thus optimizing efficiency. Each supply rail has an associated driver capable of sourcing current to the amplifier output. When a supply rail is selected, its associated driver is enabled and other driver(s) not associated with the selected supply rail are disabled via separate disable control signals. The disabling of the deselected driver may be delayed until current above a predetermined threshold is sensed at the output of the enabled driver. In addition, the frequency of switching between the power rails may be limited via various means designed to limit distortion in the power supply system.01-27-2011
20110018352VARIABLE POWER SOURCE AND RELATED POWER SUPPLY METHOD - A power source includes a plurality of cells, a positive output, a negative output, a number of positive switches, a number of negative switches, and a number of serializing switches. Each of the cells includes a positive electrode and a negative electrode. Each of the positive switches is for connecting a corresponding positive electrode to the positive output. Each of the negative switches is for connecting a corresponding negative electrode to the negative output. Each of the serializing switches is for connecting a positive electrode of a corresponding cell to a negative electrode of an adjacent cell.01-27-2011
20100096929POWER SUPPLY SYSTEM - A power supply system includes a power supply device, a switch device, a detecting device and a wireless operating terminal. The power supply device is connected to an electric appliance via the switch device to supply electric power to the electric appliance. The detecting device is connected to the switch device to detect working electric potential of the power supply device and the electric appliance, thereby generating and recording detecting data of the power supply device and the electric appliance. The wireless operating terminal communicates with the detecting device for remotely receiving the detecting data from the detecting device.04-22-2010
20100033016System for Generating Electric Energy - The invention relates to a system for generating electric energy from renewable energy sources. The system includes a plurality of generator aggregates (02-11-2010
20100264743STATIC TRANSFER SWITCH DEVICE, POWER SUPPLY APPARATUS USING THE SWITCH DEVICE AND SWITCHING METHOD THEREOF - Disclosed is a static transfer switch with a modified structure that can selectively supply power from power sources to a load stably and continuously, a power supplying apparatus employing the same, and a switching method thereof. The present invention includes mechanical/electrical contact point switches in parallel to semiconductor switches, and minimizes operation time of the semiconductor switches by turning on/off the mechanical or electrical contact point switches together when the semiconductor switches are turned on/off to reduce a failure rate of the semiconductor switch. Also, the static transfer switch makes a switching unit electrically/mechanically separable from a power source with failure to switch a power supply path and thereby prevent superposition caused by the switching unit. This prevents a problem caused when electrical or mechanical contact point switches simply in parallel, that is, a problem that power sources are turned on simultaneously when the power supply paths are switched.10-21-2010
20110254374SYSTEM AND METHOD FOR A REDUNDANT POWER SOLUTION - A redundant power solution system, including at least a first and second input module, each configured for receiving input power, an output converter, wherein a first output line from the first input module and a second output line from the second module both feed into the output converter, and a control mechanism associated with the first and second input modules, wherein the control mechanism monitors the input power received by the first and second input modules and dynamically selects at least one of the first and second input modules to feed power into the output converter.10-20-2011
20080252147Modular multiple-circuit electrical system - A multiple circuit duplex module comprising a chassis having an electrical chassis receptacle providing a plurality of connection points for the selection of power from two or more different circuits; a duplex element having at least one electrical duplex receptacle thereon to deliver power from one of the two or more different circuits to an external device in electrical contact with the at least one duplex receptacle; first conductor means for electrically connecting the at least one duplex receptacle to selected connection points in the chassis receptacle; wherein the duplex element is connectable to the chassis in different orientations, the orientation of the duplex element determining which one of the two or more different circuits is electrically connected to the at least one duplex receptacle.10-16-2008
20130169053DETECTION CONTROL DEVICE AND METHOD THEREOF - The present invention provides an auto-detection control apparatus, which receives an electric power from one of a system power source signal and an external device and performs a detection when coupled to the external device. The apparatus comprises a detection module, a power management module and a control module. The detection module generates a first result based on whether a first power signal from the external device exists, wherein the first result is related to whether the external device provides an electricity to itself. The power management module prevents a conflict between the system power source signal and the first power signal. The control module determines whether the electric power is supplied to the external device by the power management module based on the first result.07-04-2013
20100320842STARTUP SOURCE INVERTER - A method and an apparatus for setting up synchronization, with a power grid, of an inverter having a photovoltaic generator as a primary energy source is disclosed. The inverter is supplied with the energy from an additional energy source connected in parallel with input terminals of the inverter, wherein the additional energy source is a DC energy source operated independent from the primary energy source. The frequency, phase relationship and output voltage of the inverter supplied from the additional DC energy source are matched to the frequency, phase relationship and output voltage of the power grid, whereafter the primary energy source is connected to the inverter. With this method, an inverter dimensioned for a permissible open-circuit voltage can also be used under operating conditions, without requiring modifications of the circuitry of the primary energy source.12-23-2010
20120146421FUEL CELL SYSTEM - An output of a fuel cell is appropriately controlled. A required electric power generation amount calculation unit calculates and adds: an amount of electric power to be supplied to a traction motor; an amount of electric power to be supplied to an auxiliary apparatus; and an amount of electric power to be supplied to a battery and the traction motor in accordance with the charging and discharging of the battery, to calculate a required electric power generation amount. A lost electric power amount calculation unit calculates a lost electric power amount with reference to a lost electric power amount map based on: the required electric power generation amount; and a voltage increase ratio, output voltage and temperature in an FC converter. A lost electric power amount addition unit corrects the required electric power generation amount by adding the lost electric power amount to the required electric power generation amount. An electric power generation request unit outputs an instruction requesting power generation such that the electric power is generated in the required electric power generation amount after being corrected.06-14-2012
20110095615POWER SOURCE SELECTION CIRCUIT AND ELECTRONIC DEVICE USING THE SAME - A power source selection circuit includes an external power port and a battery compartment, which are used to connect to an external power source and a battery module, respectively. The power source selection circuit further includes a selection switch including a control terminal connected to the external power port, and a first path terminal connected to the battery compartment. A first unidirectional switch connects a second path terminal of the selection switch to a power output port. A second unidirectional switch connects the external power port to the output terminal. When the external power port is connected to the external power source, the control terminal of the selection switch is at a high voltage and the selection switch is cut off accordingly, thereby the path from the battery module to the power output port is cut off and the external power source provides power to the output port.04-28-2011
20110095614SCALABLE HIGHEST AVAILABLE VOLTAGE SELECTOR CIRCUIT - A scalable highest available voltage selector circuit determines the highest of n input voltages and connects the highest voltage to an output. The circuit has at least n circuit branches, each of which comprises n−1 “comparator” FETs connected between an input voltage and an output node, and a diode-connected FET connected between the output node and a current source. The junction of the diode-connected transistor and current source provides a control signal used by the other branches. Each of a branch's comparator FETs have their gates connected to a respective one of the other branches' control signals, such that they are driven on regeneratively when the applied input voltage is the highest of the n input voltages. Each branch also includes n−1 “shorting” FETs connected across the diode-connected transistor, arranged to be driven off when the applied input voltage is the highest, but which are otherwise driven on.04-28-2011
20100060083VOLTAGE REGULATION APPARATUS AND METHOD OF REGULATING A VOLTAGE - A voltage regulation apparatus comprises a plurality of individually switchable current sources coupled to an output for coupling the voltage regulation apparatus to an external load. The output is monitored using a bridge divider and a comparator. The bridge divider generates a feedback voltage, that is compared with a reference voltage, representative of a target voltage to be maintained at the output, when loaded. A digital sequencer unit is coupled to the comparator and responds to the comparator to increase or decrease a number of the plurality of individually switchable current sources activated, thereby causing a collective current generated by the activated number of the plurality of individually switchable current sources to converge on a load current, demanded by the external load.03-11-2010
20100194201SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE AND POWER SUPPLY CIRCUIT - A semiconductor integrated circuit device includes a power supply circuit that generates one or more internal supply voltages from an external supply voltage, and one or more functional circuits that operate on the one or more internal supply voltages. A step-down converter in the power supply circuit generates one or more stepped-down voltages from the external supply voltage. A control circuit in the power supply circuit compares the external supply voltage with a reference voltage and selects the internal supply voltages from among the external supply voltage and the stepped-down voltages according to the result of the comparison. The semiconductor integrated circuit device can accordingly operate on different external power supplies, and can continue to operate on battery power even if the battery voltage drops.08-05-2010
20110148211SEMICONDUCTOR DEVICE - In a semiconductor device according to the embodiment, a core circuit is an IC. A peripheral circuit includes a driver supplied with voltages from an internal power source and an external power source and outputting data transferred from the core circuit, and a fetch portion transferring the digital data to the driver. A first power source supplies an internal voltage to the driver via a power source line. A second power source includes current driving strings each including a current driving element and a switching element connected in series between the external power source and the power source line. The second power source supplies a current to the power source line separately from the first power source line by driving the current driving strings. A power source controller controls the second power source to drive the current driving strings when a logic transition occurs among consecutive bits of the data.06-23-2011
20100026099ELECTRONIC APPARATUS, CHARGER, CHARGING SYSTEM, AND CHARGING METHOD - An electronic apparatus 02-04-2010
20120098345MINIMAL INTERRUPTION DC POWER SUPPLY - A DC power distribution system and method includes a solid state remote power controller that connects a switching power source to a DC bus when the DC bus is switching power sources thereby providing a nearly uninterrupted power supply to the DC bus.04-26-2012
20120146422HYBRID ELECTRIC-POWER SUPPLYING SYSTEM - In a plug-in operation, a first winding which functions as an armature winding for supplying an R-phase current of a three-phase rotary electric machine, a third winding, and a second winding are connected respectively to terminals for supplying R-phase, S-phase, and T-phase currents of a three-phase power source. Thus, the S-phase current and the T-phase current are interchanged as compared with in a normal operation. Thereby, reverse rotation of a field element is intentionally caused. A reverse-rotation prevention mechanism is provided in the field element.06-14-2012
20120306276ELECTRICAL AND/OR ELECTRONIC SUPPLY CIRCUIT AND METHOD FOR PROVIDING A SUPPLY VOLTAGE - An electrical and/or electronic supply circuit, which serves to provide a first or a second, essentially constant value of a supply voltage, which supply voltage serves to operate an operating electronics. The supply circuit serves to output the first value of the supply voltage when the supply voltage is derived from a first voltage source, and the supply circuit serves to output the second value of the supply voltage when the supply voltage is derived from a second voltage source.12-06-2012
20120306275System and Method for Charging and Discharging a Li-ION Battery - An electrochemical battery system, in one embodiment, includes a plurality of electrochemical cells, a memory in which command instructions are stored, and a processor configured to execute the command instructions to sequentially connect a first set of the plurality of electrochemical cells to an electrical load, disconnect the first set from the electrical load, connect a second set of the plurality of electrochemical cells to the electrical load, and disconnect the second set from the electrical load, wherein the electrochemical cells in the first set and the electrochemical cells in the second set are selected based upon a target electrochemical cell discharge rate.12-06-2012
20120068544AUTONOMOUS CONTROL IN CURRENT SHARE POWER SUPPLIES - A method for autonomous control by a power supply unit (PSU) among a number of current share PSUs in a power supply system. The method includes: Receiving input power from a power input feed; setting a mode of the PSU to ON; receiving a first controlled signal including a first number of IStar modes and thresholds; receiving a first activation signal activating IStar in the PSU; receiving a second controlled signal comprising a first voltage; determining that the first voltage is less than a first Active standby OFF threshold for an IStar mode of Active standby OFF; setting the IStar mode for the PSU to Active standby OFF; receiving a third controlled signal that includes a second voltage; determining that the second voltage is greater than a first Active ON threshold for an IStar mode of Active ON; and setting the IStar mode for the PSU to Active ON.03-22-2012
20120043819POWER STORAGE SYSTEM, METHOD OF CONTROLLING THE SAME, AND COMPUTER READABLE RECORDING MEDIUM STORING A PROGRAM FOR EXECUTING THE METHOD - A power storage system for supplying power to a load by coupling a power generation system, a battery, and a grid, the power storage system includes a battery management system (BMS) for controlling charging and discharging of the battery and a power supply circuit for supplying power to the BMS, wherein the power supply circuit is configured to supply external power to the BMS as an operating power of the BMS in a first state in which the external power is applied, and the power supply circuit is configured to supply power of the battery to the BMS as the operating power of the BMS in a second state in which the external power is not applied.02-23-2012
20120043820FUEL CELL SYSTEM HAVING BYPASS CIRCUIT AND METHOD OF DRIVING THE SAME - Disclosed is a fuel cell system, which bypasses a cell, bundle, or stack. The fuel cell system includes a stack, which includes at least one unit cell including an anode, a cathode, and an electrolyte formed between the anode and the cathode. The unit cell produces electricity via an electrochemical reaction of hydrogen and oxygen provided from the anode and the cathode. The fuel cell system includes switches connected in series for connecting the unit cells in series or for short-circuiting one unit cell with adjacent unit cells, and a bypass switch to connect two unit cells separated by at least one unit cell. The fuel cell system reduces or minimizes influence of a defective cell, bundle, or stack on another normal cell, bundle, or stack, and thus the fuel cell system may operate for a long time and have excellent durability.02-23-2012
20120001490ELECTRONIC DEVICE AND METHOD OF CONTROLLING THE SAME - An electronic device and a method of controlling the electronic device are provided. Based on smart grid information received from a smart grid network, contents are played by an electronic device that consumes less power at a time slot during which a high electricity rate applies, thus minimizing electricity fees.01-05-2012
20110156485SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - A semiconductor integrated circuit device includes a driving-voltage generating circuit including a diode-connected rectifying element and a resistor element as a voltage generating source, one end of which is connected to one end of the rectifying element and the other end of which is connected to a ground potential, wherein a voltage generated by the resistor element is output to the other end of the rectifying element as a driving voltage.06-30-2011
20120007430REDUNDANT POWER SUPPLY SYSTEMS AND METHODS - A redundant power supply method is provided. The method includes communicatively coupling a load to a first source via a plurality of first power supplies and to a second source via a plurality of second power supplies. The method further includes bi-directionally communicatively coupling a controller to the plurality of first power supplies and to the plurality of second power supplies. The method includes activating a first portion of the plurality of first power supplies to supply power to the load, wherein the controller determines the number (“N”) of first power supplies activated, and activating at least one of the plurality of second power supplies to supply power to the load. The method also includes monitoring for at least one fault condition in each of the active first power supplies and in each of the active second power supplies.01-12-2012
20120056482Building With Energy Recovery and Storage Systems - A building energy recovery system having at least one wind drive mounted to the building structure proximate to the roof junction, a generator and an electrical output. The wind drive includes a radial flow wind turbine having a rotor, a rotatable shaft of the rotor, an open windward facing air intake duct, and a side facing air discharge opening disposed perpendicular to the rotatable shaft of the rotor. The intake duct is in communication with a wind blowing toward the front wall and the discharge opening is in communication with a wake region adjacent to the discharge opening and induced by a wind flowing behind the roof junction03-08-2012
20090167093Systems and Circuits with Multirange and Localized Detection of Valid Power - Methods and systems for automatically and/or locally adjusting power-valid detection. In one class of embodiments, local power-on-reset circuits are included in individual power islands; in another class of embodiments, the power-on-reset circuit is automatically reprogrammed, depending on the detected interface voltage level, to use the same circuitry for power-valid detection in either case.07-02-2009
20120013192ENERGY STORAGE SYSTEM - An energy storage system has a reduced number of capacitors for storing energy such as renewable energy, thereby reducing cost and improving stability of the system. The energy storage system is configured to store power from a power generating unit, and includes: a storage capacitor having a first end electrically coupled to one end of the power generating unit; a secondary battery having a first terminal electrically coupled to a second end of the storage capacitor, and a second terminal electrically coupled to another end of the power generating unit; and a first converter configured to selectively couple the storage capacitor and the secondary battery to a load.01-19-2012
20120013191PHOTOVOLTAIC UNIT WITH ENERGY RECOVERY AND PHOTOLTAIC ASSEMBLY COMPRISING SUCH A UNIT - The invention relates to a photovoltaic unit (01-19-2012
20120013190GRID-CONNECTED POWER CONVERSION CIRCUITRY AND POWER CONVERSION METHOD THEREOF - A grid-connected power conversion circuitry and a power conversion method thereof are disclosed. A DC-DC converter converts a renewable energy into a stable and constant DC power. A DC-AC inverter inverts the DC power into an AC power. The duty cycle of the DC-DC converter is adjusted based on a feedback signal related to the DC power, thereby stabilizing the output of the DC-DC converter. The duty cycle of the DC-AC inverter is adjusted based on a feedback signal related to the AC power as well as the phase angle of grid power that is in turn detected by a phase angle processor. Consequently, the AC power can be synchronized with the grid power in frequency. Therefore, the grid system provides auxiliary power when the renewable energy is insufficient, and the AC power output by the DC-AC inverter is synchronized with the grid power in frequency.01-19-2012
20120013189 BATTERY MANAGEMENT SYSTEM - An application for a battery management system that monitors current and voltage from one or more battery cells and determines if the current is above or below a predetermined value. If the current is below the predetermined value (e.g. a load from a few lights, etc), the battery management system disconnects the battery cells from the load when the voltage falls below a higher voltage threshold (e.g. 12V). If the current is above the predetermined value (e.g. a load from a starter motor cranking an engine), the battery management system disconnects the battery cells from the load when the voltage falls below a lover voltage threshold (e.g. 8V). Once disconnected a reset signal is required to reconnect the battery cell(s) to the load.01-19-2012
20120013193UNINTERRUPTIBLE POWER SUPPLY SYSTEM - In an uninterruptible power supply system, control sections of three uninterruptible power supply units are connected to one another by communication cables to configure one integrated control unit. The integrated control unit brings three switches into conduction if a bias feeding mode is selected by one arbitrary operation section and brings three switches into conduction if an inverter feeding mode is selected. Therefore, there is no need to separately provide an operation section and a control section for operating and controlling all of the uninterruptible power supply units.01-19-2012
20120153728BALANCING VOLTAGES BETWEEN BATTERY BANKS - A system that balances voltages between battery banks. The system includes battery banks, including a first bank and a second bank, and a first capacitor. The system also includes a first set of switching devices which selectively couple first and second terminals of the first capacitor to first and second terminals of the first bank, and to first and second terminals of the second bank. The system includes a clocking circuit which generates clock signals with substantially non-overlapping first and second clock phases. This clocking circuit is configured so that during the first phase the first and second terminals of the first capacitor are coupled to the first and second terminals of the first bank, respectively, and during the second phase the first and second terminals of the first capacitor are coupled to the first and second terminals of the second bank, respectively.06-21-2012
20120025620HYBRID POWER MANAGEMENT SYSTEM AND METHOD FOR UNMANNED REMOTE CELL SITES - A method is disclosed for managing power at an unmanned remote cell site having at least one battery and at least one generator. The method includes the steps of determining whether there is a commercial power outage at the remote cell site and determining whether site temperature at the remote cell site and battery charge of the at least one battery at the remote cell site meet predetermined limits for battery discharging. Discharge of the at least one battery is automatically initiated to power the remote cell site if there is a commercial power outage and the site temperature and the battery charge both meet the predetermined limits for battery discharging. Operation of the at least one generator is automatically initiated to power the remote cell site if there is a commercial power outage and the site temperature and the battery charge do not both meet predetermined limits for battery discharging. Power load is transferred from the at least one generator to the at least one battery whenever the site temperature meets the predetermined limits and the battery charge is at full charge. Load is transferred back to commercial power when commercial power is restored.02-02-2012
20120025619METHOD FOR HIGH VOLTAGE BUS CONTROL IN FUEL CELL VEHICLES - A system and method for controlling the voltage on a high voltage bus in a fuel cell system in response to a failed high voltage battery. The method includes determining if the high voltage battery has failed, and disconnecting the battery from the high voltage bus in response to a failure. The method measures the voltage of the fuel cell stack by a DC boost circuit and converts the measured voltage to a voltage set-point value that sets the voltage on the high voltage bus, where the voltage set-point value changes as the measured voltage changes. A supervisory controller sets the media flow to the fuel cell stack and determines a minimum stack voltage limit value based on the stack maximum current draw that is used to determine a high voltage bus lower limit value.02-02-2012
20120062037SHADOW DETECTION APPARATUS USING FIBER OPTICS FOR SOLAR-BASED POWER GENERATION PLANTS - A solar-based power generation system may include an array of components responsive to solar radiance. The components may be disposed over respective locations on a field. The system may further include a plurality of optical fibers having respective first ends coupled to the array of components and arranged to receive solar radiance. The plurality of optical fibers may have respective second ends arranged to output respective optical signals indicative of respective levels of solar radiance over the respective locations of the field. Opto-electrical circuitry may be coupled to receive the respective optical signals from the plurality of optical fibers and generate a respective signal indicative of a shadow condition present over at least one or more of the respective locations of the field.03-15-2012
20090134706REGULATED ALTERNATING CURRENT POWER SUPPLY - An exemplary regulated AC power supply comprising a three phase AC power source; a first switch having two input terminals arranged for receiving a first phase and a second phase of the three phase AC power source respectively, and an output terminal selectively connected to the input terminals for outputting a voltage of the first or the second phase; and a second switch having two input terminals arranged for receiving a third phase of the three phase AC power source and connected to the output terminal of the first switch respectively, and an output terminal selectively connected to the input terminals for outputting a voltages of the third phase or the voltage outputted by the first switch, wherein the first switch outputs the voltage of the first phase when it is provided, and the second switch outputs the voltage of the third phase when the it is provided.05-28-2009
20090134707Process Variation Tolerant Circuit With Voltage Interpolation And Variable Latency - A circuit having dynamically controllable power. The circuit comprises a plurality of pipelined stages, each of the pipelined stages comprising two clocking domains, a plurality of switching circuits, each switching circuit being connected to one of the pipelined stages, first and second power sources connected to each of the plurality of pipelined stages through the switching circuits, the first power source supplying a first voltage and the second power source supplying a second voltage, wherein the first and second power sources each may be applied to a pipelined stage independently of other pipelined stages, first and second complementary clocks, and a plurality of latches connected to the first and second complementary clocks and to the plurality of pipelined stages for proving latch-based clocking to control the first and second clocking domains and to enable time-borrowing across the plurality of switching circuits. The first voltage differs from the second voltage and the plurality of pipelined stages interpolates between the first and second voltages to provide differing effective voltages between the first and second voltages.05-28-2009
20110089764METHOD OF CONTROLLING BATTERY POWER, POWER CONTROL APPARATUS, AND PORTABLE DEVICE USING THE SAME - A method for controlling batteries, a power control apparatus, and a portable device using the same are provided. Based on a connection status of a main battery and an auxiliary battery and the relative magnitudes of voltage of the main battery and the auxiliary battery, supplying of electric power from the main battery or an integrated power source integrating the main battery voltage with the auxiliary battery voltage, recharging of the main battery and the auxiliary battery respectively or simultaneously, and the connection between the main battery and the auxiliary battery when the portable device is turned off are controlled so that electric power of the portable device using a plurality of batteries can be effectively supplied.04-21-2011
20120212063WIRELESS HEADSET HAVING ADAPTIVE POWERING - A system that includes a bus, a battery, core processing circuitry, radio frequency (RF) processing circuitry, first power regulating circuitry, second power regulating circuitry, and control circuitry is provided. The bus can be coupled to receive power from a source external to the system. The core processing circuitry and RF processing circuitry can be selectively coupled to each other via a switch. The switch can be operative to turn ON and OFF based on a signal level received on the bus. The first power regulating circuitry can be electrically coupled to the bus, the core processing circuitry, and the switch. The second power regulating circuitry can be electrically coupled to the battery, the RF processing circuitry, and the switch. The control circuitry can be operative to selectively turn ON and OFF the first power regulating circuitry and the second power regulating circuitry based on a number of monitored conditions.08-23-2012
20120119585Powering a Data Center Using Multiple Connections from a Utility Grid - A data center is electrically coupled to a power grid at two separate access points, which may be located within geographic proximity to each other. Each access point is located between two power generation systems. The access points have one or more power generation systems located between them, allowing the data center to be coupled to three or more power generation systems simultaneously and have access to power in the event of multiple power generation system failure. The data center may comprise two separate data center power inputs, which may each be connected to a separate power grid access point. The power grid may provide a high voltage level to the data center, and the data center may comprise transformers which step the voltage down to a lower voltage level. The data center may comprise one such transformer coupled to each of the two data center power inputs. The outputs of such transformers may be coupled together.05-17-2012
20120248878POLYMER MATERIAL, SOLAR CELL USING THE SAME, AND SOLAR PHOTOVOLTAIC GENERATION SYSTEM - According to one embodiment, a polymer material includes two or more different repeating units each containing a quinoxaline backbone. At least one of the repeating units includes a halogen atom.10-04-2012
20120248879Electrical Assembly for Selectively Operating a Household Appliance in a Demonstration Mode or a Standard Mode - An electrical assembly is provided for selectively operating a household appliance in a demonstration mode or a standard mode. A logic unit (10-04-2012
20120126625POWER MANAGEMENT WITH OVER VOLTAGE PROTECTION - This document discusses, among other things, systems and methods to provide an internal supply rail with over voltage protection using a host power source, an external power source, and a switch configured to receive indications of host and external power source validity. In an example, the switch can be configured to provide the internal supply rail using the host power source when the indication of host power source validity indicates a valid host power source and the external power source when the indication of host power source validity indicates an invalid host power source and the indication of external power source validity indicates a valid external power source.05-24-2012
20120126626DEVICE FOR SUPPLYING ELECTRICAL ENERGY FROM A PLURALITY OF STRINGS OF PHOTOVOLTAIC MODULES TO A POWER GRID - In a device for supplying electrical energy from a plurality of strings of photovoltaic modules to a power grid that includes a connection terminal for each string of the plurality of strings, wherein each connection terminal includes an over-current protection component including a power switch for selectively disconnecting the respective string. The device further includes a central insulation monitoring unit providing an insulation status of the entire plurality of strings, and the power switch of each over-current protection component includes an all-pole disconnecting power switch that can be opened and closed by a controller via a motor in response to the insulation status provided by the central insulation monitoring unit to select and selectively disconnect a string having an insulation failure. The device is further configured to supply electrical energy from the remaining strings of the plurality of strings having no insulation failure.05-24-2012
20120133210HYBRID ENERGY HARVESTER AND PORTABLE DEVICE THE SAME - Disclosed are a hybrid energy harvester and a portable device including the same. The hybrid energy harvester according to an exemplary embodiment of the present disclosure includes: a thermoelectric/piezoelectric element part that includes a thermoelectric element layer generating a voltage by a temperature difference, and a piezoelectric element layer generating a voltage by any one of vibration, pressure and force; an energy source selection part that selects a voltage generated in the thermoelectric element layer or the piezoelectric element layer; and a voltage controlling part that stores the voltage in an energy storage device by controlling the voltage selected in the energy source selection part.05-31-2012
20110181117POWER SWITCHING FOR ELECTRONIC DEVICE TEST EQUIPMENT - An apparatus, system and method are provided for testing a battery-powered electronic device-under-test in a transport frame engaged with a test fixture. A transport frame power supply is arranged to provide power to the DUT in a pre-testing stage. A switching circuit is arranged to switch from the transport frame power supply to a test fixture power supply in response to receiving a power switching signal indicating satisfaction of a pre-testing condition. Power from the test fixture power supply can then be switched back to the first transport frame, or to a second transport frame, to begin testing a second DUT. The ability to start a DUT test without having to wait for the DUT to boot-up in the test fixture reduces test time and increases efficiency of use of test equipment.07-28-2011
20120212062BATTERY PARALLEL-OPERATION CIRCUIT AND BATTERY SYSTEM - A first line includes a switching element and is electrically coupled to a branch point and an external load which is electrically connectable to a battery parallel-operation circuit. A second line includes a resistive element, and is electrically coupled to the external load and the branch point. The first line and the second line are each provided in a plurality. The plural first lines are connected in parallel to one another, and the plural second lines are connected in parallel to one another. The branch points are electrically coupled respectively to plural external, connectable battery units.08-23-2012
20120212061HIGH VOLTAGE POWER SOURCE DEVICE AND IMAGE FORMING DEVICE - A high voltage power source device includes piezoelectric transformers, each of the piezoelectric transformers being formed with a primary electrode and a secondary electrode on piezoelectric ceramics, receiving a primary voltage at the primary electrode, and generating a second voltage from the secondary electrode, switching elements, each of the switching elements driving a respective one of the piezoelectric transformers, and primary voltage supply devices, each of the primary voltage supply devices supplying the primary voltage to the primary electrode of the respective one of the piezoelectric transformers by driving the respective one of the switching elements when the secondary voltage is generated from the respective one of the second electrodes, wherein the respective one of the primary voltage supply devices supplies the primary voltage to the respective one of the primary electrodes by driving the respective one of the switching elements at the same frequency.08-23-2012
20120169130INTERNAL-COMBUSTION ENGINE SYSTEM AND SHIP - A first generator is rotationally driven by a rotating shaft of a supercharger to generate power. A second generator generates power and drives an output shaft. A first converter converts alternating-current power generated by the first generator into direct-current power. A second converter always converts alternating-current power generated by the second generator into direct-current power having the same voltage as the direct-current power obtained by conversion through the first converter, or converts the direct-current power obtained by conversion through the first converter into alternating-current power and supplies the alternating-current power to the second generator. An inverter converts the direct-current power obtained by conversion through at least one of the first and second converters into alternating-current power.07-05-2012
20120169129Energy Storage Device - An energy storage device formed by a combination of aqueous battery unit cells and non-aqueous battery unit cells is provided. The energy storage device comprises a first energy storage module formed by connecting at least one of aqueous battery unit cells in series and a second energy storage module formed by connecting at least one of lithium ion battery unit cells in series, wherein the first energy storage module and the second energy storage module are connected in parallel, the lithium ion battery unit cell is formed of a cathode active material such as LiFePO07-05-2012
20120175961Disconnection of a String Carrying Direct Current Power - A direct current (DC) power combiner operable to interconnect multiple interconnected photovoltaic strings is disclosed. The DC power combiner may include a device adapted for disconnecting at least one photovoltaic string from the multiple interconnected photovoltaic strings, each photovoltaic string connectible by a first and second DC power line. The device may include a differential current sensor adapted to measure differential current by comparing respective currents in the first and second DC power lines. A first switch is connected in series with the first DC power line. A control module is operatively attached to the differential current sensor and the first switch. The control module may be operable to open the first switch when the differential current sensor measures the differential current to be greater than a maximum allowed current differential, thereby disconnecting the photovoltaic string from the interconnected photovoltaic strings.07-12-2012
20100270863VOLTAGE BASED SWITCHING OF A POWER SUPPLY SYSTEM CURRENT - Systems and methods of voltage based switching of a power supply system current are disclosed. In one embodiment, a power supply system includes a power bus to supply electrical power to a system load. A power supply is coupled to the power bus. The power supply provides current to the power bus and generates a voltage α. In addition, the system includes an additional power supply coupled to the power bus. The additional power supply generates a voltage β that is lower than the voltage α. An oring module restricts the additional power supply from providing current to the power bus, until a power bus voltage θ is greater than a threshold voltage.10-28-2010
20120074788SYSTEM AND METHOD FOR PROVIDING REDUNDANT POWER TO A DEVICE - A system for providing power to a device includes a first power supply unit having a first power module that provides A.C. power and is selectively connectable to input lines and a first communication module. The system also includes a second power supply unit having a second power module selectively connectable to the input lines and that provides A.C. power and a second communication module coupled to the first communication module. Only one of the first or second power supply units is coupled to the input lines at a given time.03-29-2012
20120074787INTEGRATED PHOTOVOLTAIC SOURCE CIRCUIT COMBINER AND PROTECTION SUBSYSTEM - A combiner circuit and voltage protection circuit is disclosed. A plurality of photovoltaic sources is provided. A set of fuses, each having one side coupled to one of the plurality of photovoltaic sources is provided. A set of contacts, each having one side coupled to the other side of one of the fuses is provided. The other side of the contacts are coupled together to combine the output of the photovoltaic sources to an output interface, the output interface being coupled to the load. A set of diodes are each coupled to each of the set of fuses and form a current path around the set of contacts. A transistor is coupled to each of the diodes and the load interface. The transistor has an on state completing the flow of current through the diodes around the set of contacts to the load interface.03-29-2012
20120313441ACTIVE CELL BALANCING - A battery cell balancing system includes N switching circuits connected to first terminals and second terminals of N battery cells, respectively, where N is an integer greater than one. A first transformer includes a first core and N sets of windings wound around the first core. The N sets of windings are connected to the N switching circuits, respectively. A first control module controls switching of the N switching circuits to reverse first connections between the first terminals and the second terminals of the N battery cells and the N sets of windings, respectively, at a first frequency to balance charge levels of the N battery cells.12-13-2012
20120261997POWER CONTROL SYSTEM AND CONTROLLING METHOD THEREOF - A power control system includes a rechargeable battery, the rechargeable battery including a first battery unit and including a second battery unit connected to a first terminal of the first battery unit at a first node, a switching unit, the switching unit including a first switch connected to a second terminal of the first battery unit and including a second switch connected to the first node, and a control unit, the control unit being configured to generate and transmit switch control signals respectively corresponding to the first switch and the second switch, and being configured to control a voltage of the rechargeable battery such that the voltage is maintained in a threshold range of a predetermined rated voltage.10-18-2012
20120261998POWER CONTROL APPARATUS, POWER CONTROL METHOD, AND PROGRAM - There is provided a power control apparatus including a calculating unit that calculates transmission efficiency of power from each of a plurality of devices when the power is received from one device of the plurality of devices and a control unit that controls power transmission from a device in which the transmission efficiency is high.10-18-2012
20120261999RECONFIGURABLE POWER SYSTEMS AND CONVERTERS - Reconfigurable power systems and converters and operating methods therefor are disclosed. Reconfigurable power systems may include a DC power source, an electrical energy storage device, an AC power grid connection, and a power converter configured to selectively couple two or more of the DC power source, the electrical energy storage device, and the AC power grid connection.10-18-2012
20120228946BATTERY SYSTEM, CONTROLLING METHOD OF THE SAME, AND ENERGY STORAGE SYSTEM INCLUDING THE BATTERY SYSTEM - A battery system includes a rack having a plurality of battery tray positions, a battery tray in a corresponding battery tray position among the battery tray positions, and a system management unit electrically coupled to the battery tray. Each of the battery tray positions is associated with position information, and the battery tray has an identifier. The system management unit is configured to receive and store the position information and the identifier, and to determine the corresponding battery tray position of the battery tray in accordance with the identifier and the position information.09-13-2012
20120228948CHARGING APPARATUS FOR CONSTRUCTION MACHINE - A charging apparatus includes a diode, a switch, a high-voltage conversion circuit, and a controller which determines whether a charge capacity of a low-voltage battery is above a threshold and outputs a signal for supplying power of a generator to the low-voltage battery when the charge capacity is equal to or below the threshold while outputs a signal for charging the high-voltage battery when the charge capacity is above the threshold value.09-13-2012
20120228947ENERGY COLLECTION SYSTEM AND METHOD - A system and method is provided for optimizing energy collection from a plurality of energy generators, which have different IV-characteristics thus defining over-performing and under-performing energy generators. Optimization of the energy collection is implemented by providing a power redistribution unit electrically connected to the plurality of electrically connected energy generators. The power redistribution unit comprises a bus-connector and at least two electric coupling assemblies electrically connectable to the bus-connector. Each of the electric coupling assemblies is associated with one or more of the energy generators and is configured and controllably operable to provide selective electrical coupling between the bus-connector and said at least two of the energy generators according to a predetermined time pattern such that during the system operation there always exist at least one coupling assembly in the electrical connection to the respective one or more of the energy generators, thereby enabling redistribution of power in between said at least two energy generators and optimizing energy collection therefrom.09-13-2012
20110121657POWER SUPPLY CIRCUIT - A power supply circuit for a graphic card on a motherboard includes first to fourth electrical switches. The first electrical switch is connected to the motherboard to receive a power good signal from the motherboard. The second electrical switch is connected between the first electrical switch and each of the third and fourth electrical switches. The third and fourth electrical switches provide power to the graphic card. The first electrical switch is turned on or off according to the voltage of the power good signal. The second electrical switch is turned on or off by the first electrical switch, so as to selectively control one of the third and fourth electrical switches turn on to output power to the graphic card.05-26-2011
20110121656Systems and methods for delivering power in response to a connection event - Systems and methods are provided for delivering power from a first energy source to a second energy source. An electrical system for delivering power from a first energy source to a second energy source comprises an interface configured to be coupled to the second energy source, a switching element coupled between the first energy source and the interface, and a processing system coupled to the switching element and the interface. The processing system is configured to identify a connection event based on an electrical characteristic of the interface that is indicative of the interface being coupled to the second energy source and operate the switching element to provide a path for current from the first energy source in response to identifying the connection event.05-26-2011
20120319491METHODS AND SYSTEMS FOR PROVIDING AN APPLIANCE HYBRID MODE - A hybrid energy management method and system which provides a main power supply and a secondary power supply. The main power supply is electrically coupled to the utility power grid, while the secondary power supply is electrically isolatable from the utility power grid. A switch is provided to selectably power the appliance through the main alternating current power supply when the utility is not in a reduced demand operating mode and to selectably power the appliance through the secondary alternating current power supply when the utility is in a reduced demand mode.12-20-2012
20120319492POWER CONTROL METHOD AND ELECTRONIC DEVICE - According to one embodiment, a power control method includes receiving supply amount information regarding a limit of supply amount of commercial power and consumption information regarding consumption of the commercial power in the past time, generating predictive information regarding a predictive value of consumption of commercial power at a time after the past time based on the received consumption information, and driving an electronic device by switching between a commercial power supply and a battery power supply according to the received supply amount information and the generated predictive information.12-20-2012
20120326518PARALLEL ELECTRIC SERVICE SYSTEM AND METHOD USING METER SOCKET AND LOAD CENTER COMBINATION - A parallel electric service system including a combination load center is disclosed. More particularly, the parallel electric service system encompasses a combination load center adapted to receive power from a utility power source and a parallel power source such as a solar module, wind turbine, fuel cell, or the like. Power may be supplied to electrical loads of branches of the system by the utility power source, parallel power source, or both. The system also provides electrical usage metering and allows electrical power to flow back to the grid. Methods of connecting parallel power sources in the parallel electric service system are provided, as are other aspects.12-27-2012
20120319493DYNAMICALLY RECONFIGURABLE FRAMEWORK FOR A LARGE-SCALE BATTERY SYSTEM - A dynamically reconfigurable battery framework for management of a large-scale battery system systems is provided. The framework monitors, reconfigures, and controls large-scale battery systems online. The framework is built upon a topology-based bypassing mechanism that provides a set of rules for changing the battery-pack configuration, and a semantic bypassing mechanism by which the battery-cell connectivity is reconfigured to recover from a battery-cell failure. More specifically, the semantic bypassing mechanism implements a constant-voltage-keeping policy and a dynamic-voltage-allowing policy. The former policy is effective in preventing unavoidable voltage drops during the battery lifetime, while the latter policy is effective in supplying different amounts of power to meet a wide-range of application requirements.12-20-2012
20120080954ENHANCED POWER IN HDMI SYSTEMS - There is provided a source device, which is adapted to communicate with a sink device through an HDMI cable. The sink device comprises an internal circuit, handshaking circuitry adapted to verify if the sink device is able to supply a current on a line of the HDMI cable, an internal power supply intended for powering the line and a switching circuit able to uncouple the internal power supply from the line and able to couple the internal circuit to the line. There is also provided a sink device, which is adapted to communicate with a source device through an HDMI cable. The sink device comprises a power supply, hand-shaking circuitry able to indicate that the sink device is able to supply a current on a line of said HDMI cable, and a circuit able to couple the power supply to the line.04-05-2012
20100231051POWER LATCH - A circuit that automatically, seamlessly connects the higher (or the lower) of two power supplies to an output is described. The circuit does not incur a one diode drop when the two power supplies are at about the same voltage levels, and the unused power supply draws no stand-by current. Cross coupled transistor and cross coupled inverters are employed.09-16-2010
20120280573BATTERY SYSTEM, ELECTRIC VEHICLE, MOVABLE BODY, POWER STORAGE DEVICE, AND POWER SUPPLY DEVICE - One state detector detects an abnormal state or a normal state relating to charge and discharge of a battery cell group in one battery module, and generates one detection signal representing the detected state. Another state detector detects an abnormal state or a normal state relating to charge and discharge of another battery cell group in another battery module, and generates another detection signal representing the detected state. One operation processing device sends the one detection signal generated by the one state detector to an external object. Another operation processing device sends the other detection signal generated by the other state detector to the external object. The one detection signal generated by the one state detector is transmitted to at least one of the other operation processing device and the other state detector via a signal line.11-08-2012
20120091816POWER SYSTEMS WITH MULTIPLE POWER SOURCES - In one embodiment, a power system includes a first power source having a first voltage, a second power source having a second voltage, and a controller. The controller is coupled to the first power source and the second power source. The controller compares the first voltage with the second voltage, controls the first power source to charge the second power source via a first switch and a second switch in a charging mode when the first voltage is greater than said second voltage, and controls the second power source to power a load such as a light-emitting diode (LED) light source via the second switch and a third switch in a load-powering mode when the second voltage is greater than the first voltage.04-19-2012
20120091815System and Method for Thermal Protection in a Power System - In accordance with embodiments of the present disclosure, systems and methods for thermal protection in a power system may be provided. In accordance with certain embodiments of the present disclosure, a method for thermal protection in a power system having a plurality of power modules selectively enabled and disabled in accordance with an efficiency policy may be provided. The method may include determining if an operating temperature for the power system is greater than a first threshold temperature. The method may also include enabling one or more power modules disabled in accordance with the efficiency policy in response to a determination that the operating temperature is greater than the first threshold temperature.04-19-2012
20120326517SYSTEM AND METHOD FOR SWITCHING BETWEEN A FIRST SUPPLY VOLTAGE AND A SECOND SUPPLY VOLTAGE OF A LOAD - A system switches between application of a first supply voltage and a second supply voltage to a load. The second supply voltage is a regulated voltage that is generated from the first supply voltage, or is alternatively generated from a reference voltage, such as bandgap. When the load is supplied from the first supply voltage, the regulated voltage is also generated from the first supply voltage. At or after switching the load to the second supply voltage, the regulated voltage is generated instead from the reference voltage. The load is a clock circuit, such as an oscillator. The controlled switching of the supply voltage for the load in the manner described addresses concerns over introducing errors in the output clock signal when the clock circuit's supply voltage is changed.12-27-2012
20130015716SMART METER, SUPPLY CONTROL METHOD, OPERATING METHOD, INTEGRATED CIRCUIT, SYSTEM, AND PROGRAMAANM Matsushima; HidekiAACI OsakaAACO JPAAGP Matsushima; Hideki Osaka JPAANM Matsuzaki; NatsumeAACI OsakaAACO JPAAGP Matsuzaki; Natsume Osaka JPAANM Haga; TomoyukiAACI NaraAACO JPAAGP Haga; Tomoyuki Nara JP - A smart meter includes: a power supply control unit which causes stoppage of a supply of power passing through the smart meter to an television and so on, when an RD command to stop the supply is received; a first communication unit which performs a first communication through which the RD command is received; a second communication unit which performs a second communication; and a communication control unit which: causes the performance of the first communication before the RD command is received; and prohibit the performance of the first communication and cause only the performance of the second communication, after the RD command is received.01-17-2013
20110148212ELECTRONIC DEVICE - A projector includes an internal power supply, which supplies power to an electrical circuit in the projector, and a power supply terminal, which is electrically connected to a peripheral device. The projector also includes a switching circuit that switches between a power output state, in which power from the internal power supply is output via the power supply terminal to a peripheral device such as a remote control signal transmitter connected to the power supply terminal, and a power input state, in which power is input via the power supply terminal from a peripheral device such as a power supply device connected to the power supply terminal.06-23-2011
20120242154SEQUENTIAL SHUNT REGULATOR WITH ANALOG FILL CONTROL - A sequential shunt regulator switch system and method is disclosed. A power switch is controlled to switch a first current from a power source to an electrical bus. Further, a current controllable switch provides a controlled current from the power source to the electrical bus.09-27-2012
20130175868POWER SUPPLY SYSTEM WITH PRIORITIZED NETWORK SELECTION - A power supply system with prioritized network selection is disclosed. In one aspect, the system can be connected to the output of N power supply networks (R07-11-2013
20130093249AUTO-SWITCHING DUPLEX MODULE - A system and method (“utility”) for providing power to an electrically powered device from alternate, redundant power sources via a single power cord. The utility is operable to provide redundant power to an electrical device having a power cord terminating in a standard plug. The utility is operable to sense a loss of power quality from one power source, and to switch a connection to another power source in response to the loss. The utility may be configured to match the form factor of a standard (e.g., NEMA or other electrical standard) duplex receptacle unit. The utility may be incorporated into a standard outlet box or may plug into a standard outlet box.04-18-2013
20130113291DISTRIBUTED ENERGY MANAGMENT USING GRID-SHIFTING DEVICES - In embodiments of the present invention improved capabilities are described for systems and methods that provide a method of power management of a lighting source, including providing a lighting facility, wherein the lighting facility includes the lighting source, an external control device for communicating between the lighting facility and an external control source, an internal control facility, an energy storage device, and a connection to external power; and shifting power usage between the external power and the energy storage device as controlled by the internal control facility and as a result of information received from the external control source.05-09-2013
20130099576INTEGRATED POWER SYSTEM CONTROL METHOD AND RELATED APPARATUS WITH ENERGY STORAGE ELEMENT - Systems and methods for controlling a hybrid power architecture to provide fuel or energy savings. Recharge time of an energy storage device (ESD) is reduced through the application of a controlled potential and ESD recharge time management over the life of the hybrid system through manipulation of the ESD charge state window of operation. Fuel or energy savings is achieved by controlling the partial-state-of-charge (PSOC) window of the ESD based on a recharge resistance profile of the ESD and by controlling a charging potential applied to the ESD based on a recharge current and/or the estimated recharge resistance profile of the ESD.04-25-2013
20130113290CONTROL DEVICE FOR POWER SUPPLY CIRCUIT - In a control device for a power supply circuit in which a plurality of high-voltage battery packs are provided, if any one of safety switch is off, the startup state of a high-voltage circuit is totally prevented, even when a careless mistake such as a careless power-on (ON) operation is made, the circuit is prevented from being started, and also the overall power supply is cut off by turning off (OFF) one safety switch, thereby improving the convenience of work. Voltage sensing units (05-09-2013
20130140902FUEL CELL RECOVERY TIME SYSTEM - The disclosure is directed at a fuel cell recovery time system for a mobile communication device including a battery for supplying power to the mobile communication device when the device is in a stand-by mode; a fuel cell element including at least two fuel cells, one of the at least two fuel cells being always on and the remaining fuel cells being off in the stand-by mode; wherein the one of at least two fuel cells generates heat to improve operating conditions for the remaining fuel cells in the fuel cell element when the device enters an active mode.06-06-2013
20110210612INVERTER FOR PHOTOVOLTAIC SYSTEMS - The invention concerns an inverter for solar panels which includes at least two inverter inputs to each of which a group of solar panels can be connected, and an inverter output to which a network can be connected. The inverter includes an inverter element with a direct voltage input and an alternating voltage output which converts the direct voltage which is connected to its direct voltage input into alternating voltage and sends it to the inverter output, an electronic control system which monitors the direct voltage which is connected to the direct voltage input of the inverter element and the network voltage and/or the network frequency of the network which is connected to the inverter output, and a switching system which is electrically arrayed between one of the at least two inverter inputs and the direct voltage input of the inverter element, wherein the at least two inverter inputs of the inverter are connected in series with the direct voltage input of the inverter element. The electronic control system is designed so that it triggers the switching system to disconnect the at least one inverter input of the inverter from the direct voltage input of the inverter element if the voltage which is connected to the direct voltage input of the inverter element exceeds an upper threshold value and/or the network voltage and/or the network frequency of the network which is connected to the inverter output lies outside a previously specified normal voltage or normal frequency range.09-01-2011
20130127250POWER REDUNDANT SYSTEM - A power redundant system is provided. The power redundant system includes N first voltage generators, M second voltage generators, a switch unit and a control unit. A voltage of the i-th first voltage generator and a voltage of the j-th second voltage generator are equal. When a power good signal is enabled, the control unit enables a power control signal to control the switch unit so that an output of the switch unit is connected to an output of the j-th second voltage generator. When a power supply signal is enabled and the power good signal is disabled, the control unit disables the power control signal to control the switch unit so that the output of the switch unit is connected to an output of the i-th first voltage generator. Therefore, the first voltage generator and the second voltage generator of the system can backup each other.05-23-2013
20110241432INTERFACE CIRCUIT AND INTERFACE SYSTEM - To aim to provide an interface circuit that supports both a single-ended method and a differential method as a transmission method, and one of pairs of input terminals for a differential signal is shared to input/output a single-ended signal.10-06-2011
20100289339ELECTRONIC DEVICE WITH POWER TESTER - An electronic device includes an internal device and a voltage tester. The internal device includes a power supply source input terminal. The voltage tester supplies one of first and second power supply source voltages to the power supply source input terminal of the internal device, in response to a test signal. The first and second power supply source voltages have different voltage levels. The first power supply source voltage has a voltage level within a normal range required for normal operations of the internal device. The second power supply source voltage has an abnormal voltage level outside the normal range.11-18-2010
20090295231Intelligent Power Collection Network - Connecting a system of electrical generators into a network in order to yield at least some of the following benefits: reduced capital costs, reduced operating costs, enhanced system reliability, and automatic fault isolation. In one embodiment, a plurality of generators are provided wherein the output of each generator has substantially the same voltage and phase relationship. Multiple cables directly connect the generators to a power collection point, the cables forming a network that supplies power to the power collection point from at least two separate current paths.12-03-2009
20100308662High Efficiency Remotely Controllable Solar Energy System - A solar energy system (12-09-2010
20100308661SYSTEM AND METHOD FOR SUPPLYING POWER ON DEMAND TO A DYNAMIC LOAD - An apparatus for supplying power to a load. The apparatus including a plurality of sources to provide charge, and a controller adapted to control a transfer of charge from the sources to the load at distinct times. The controller may control the transfer of charge based on variation of an ambient condition or a manufacturing process. The controller may control the transfer of charge to generate a defined voltage across the load. The apparatus may include a regulator adapted to regulate a voltage across the load. The regulator may regulate the voltage across the load in a defined timing relationship with the transfer of charge from the sources to the load.12-09-2010
20120274144SYSTEM AND METHOD FOR EFFICIENTLY HARVESTING ENVIRONMENTAL ENERGY - A transducer converts energy coming from an energy source into an electrical signal for storage as electrical energy on a first storage element. A switch is selectively actuated to pass electrical energy from the first storage element to a second storage element. The selective actuation of the switch is driven by sensing electrical energy stored in the second storage element. The switch is closed when electrical energy in the second storage element is sensed to fall below a first threshold. The switch is opened when electrical energy in the second storage element is sensed to rise above a second threshold.11-01-2012
20120274143POWER SUPPLY DEVICE - A power supply device includes a plurality of power supply units connected in parallel, and includes a positive electrode-side junction formed by the joining of positive electrode-side terminals of the plurality of power supply units and a negative electrode-side junction formed by the joining of negative electrode-side terminals of the plurality of power supply units. Each of the plurality of power supply units includes a battery unit, and a first relay that is provided between one of the positive and negative electrode-side junctions and the battery unit and is electrically disconnectably connected in series to the battery unit. Each of the plurality of power supply units includes a resistive element of which one end is connected between the first relay, which is connected to one of a positive electrode terminal and a negative electrode terminal of the battery unit, and the battery unit.11-01-2012
20100314945BIDIRECTIONAL CONVERTER AND ELECTRONIC DEVICE - Provided is a bidirectional converter which has flexibility to be applicable in various conditions and performs stable switching of operation mode at high efficiency. An electronic device which supplies power in various conditions and operates with excellent efficiency is also provided. An electronic device is provided with a bidirectional converter, which has a reactor and four switches between power supply input terminals and a secondary battery, and a system circuit is supplied with an operation voltage through the bidirectional converter. A status signal indicating the operation status of the system circuit is transmitted to a microcomputer of the bidirectional converter, and based on the status signal, switching of operation mode of the bidirectional converter is controlled.12-16-2010
20090015072Parasitic power supply for traffic control systems - A parasitic power supply provides for drawing power for an auxiliary device from a set of sequentially driven loads. A typical source of power is a traffic signal wherein the power may be sequentially applied to red, green and yellow lamps. The design provides isolation between loads so no two loads will be powered through any single-point failure of the power supply. The device may further contain control elements such as time delays to make the system compatible with requirements of safety devices used in traffic control systems to sense burned-out bulbs, and to sense conflicts between lighting patterns that are supposed to be mutually exclusive. The device may be configured as a separate component, or it may be integrated into a traffic signal head or into any selected device intended for connecting to a traffic signal head. The invention is particularly suitable for standard systems operating nominally at 115 VAC, though other AC voltages, and direct-current supplies, can also be used.01-15-2009
20130200712PHOTOVOLTAIC POWER PLANT - A photovoltaic power plant (08-08-2013
20130200713Fault Detection Apparatus - There is provided a fault detection apparatus including an open/close unit configured to open/close an electric path to pass a direct current forward, a reverse-current detector configured to detect a reverse current running through the electric path backward, and an opening unit configured to open the open/close unit when the reverse current is detected by the reverse-current detector.08-08-2013
20130207475ENERGY STORAGE SYSTEM AND METHOD FOR COMMUNICATION BASE STATION - An energy storage system and method for a communication base station and is related to the communications field, to prolong the life cycle of the energy storage system, reduce the operation cost of the communication base station, and increase the rate of return on investment. The energy storage system includes: a first energy storage unit and a switching unit. One switching end of the switching unit has two switching points, which are connected to the first energy storage unit and the second energy storage unit, respectively; and the other switching end of the switching unit is connected to a power supply system of the communication base station and a load of the base station; a monitoring unit, where an output end of the monitoring unit is connected to the control end of the switching unit and configured to input a control signal.08-15-2013

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