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Series-connected 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
307078000 Generator sources 5
20080203823Arrangement for Converting Mechanical Energy Into Electrical Energy - The invention relates to an arrangement for converting mechanical energy into electrical energy comprising a piezo-electric auxiliary generator producing an auxiliary voltage and a main generator which is coupled mechanically with the auxiliary generator and producing the electrical energy.08-28-2008
20100090535SERIES CONNECTION APPARATUS FOR GENERATORS - In an apparatus for series-connecting at least two engine generators driven by an internal engine and each generates and outputs alternating current through single-phase two-wire output terminals, there are equipped with a magnetic coupler such as transformer that can magnetically couple the single-phase two-wire output terminals of the generators with the primary side and the secondary side, and a connector that can connect one of the single-phase two-wire output terminals of one of the generators and one of the single-phase two-wire output terminals of other of the generators. With this, single-phase three-wire output terminals are formed by the single-phase two-wire output terminals of the generators using the connector as a neutral line, without a communication line.04-15-2010
20110031815FUSE FOR DISCONNECTING AN INVERTER FROM A PHOTOVOLTAIC GENERATOR - A photovoltaic system includes an inverter, a photovoltaic generator with a plurality of serially connected photovoltaic modules, said photovoltaic generator connected to the inverter by an electrical supply line, a controllable fuse interconnected in the electrical supply line between the inverter and the photovoltaic generator and having a signal input, and a voltage-dependent resistor connected between the signal input of the controllable fuse and the electrical supply line and generating a control signal which triggers the controllable fuse responsive to the control signal and interrupts the electrical supply line. The controllable fuse can be used to disconnect the electrical connection of the photovoltaic system to the inverter when a switch short-circuiting one or more modules of the photovoltaic generator malfunctions. The arrangement permits operation of photovoltaic system at an operating voltage of close to 1000 V, thereby allowing use of thinner cables.02-10-2011
20110115299High Voltage Array Converter - A direct current to pulse amplitude modulated (“PAM”) current converter, denominated a “PAMCC”, is connected to an individual source of direct current. The PAMCC receives direct current and provides pulse amplitude modulated current at its output. An array of PAMCCs constructed in accordance with the present invention form a distributed multiphase inverter whose combined output is the demodulated sum of the current pulse amplitude modulated by each PAMCC. The array is configured as a series of stages, wherein the power sources within each stage are in parallel. The series of stages provides for a high voltage AC or DC output. In some embodiments a weak power source is compensated for by adjusting the voltage or the current of the weak power source.05-19-2011
20100084922Three-Level Inverter - The present invention provides a three-level inverter including first and second direct voltage generators connected in series, each between a common center point and first and second end points, and first and second switching arms. Each of the first and second switching arms are connected between a respective one of the first and second end points and an output point and include at least one IGBT transistor. The IGBT transistors of the first and second switching arms are in series between the first and second end points. Each of the IGBT transistors includes an antiparallel-connected diode. The three-level inverter also includes a third switching arm which includes two IGBT transistors connected head-to-tail. Each head to tail transistor includes an antiparallel-connected diode.04-08-2010
Entries
DocumentTitleDate
20130026840Systems and Methods to Reduce the Number and Cost of Management Units of Distributed Power Generators - Apparatuses and methods for configuring and managing solar panels to form strings of photovoltaic energy generators with improved performance and reduced cost. The photovoltaic energy generators are connected via one or more combined local management units (CLMUs), each having a plurality of direct current converters connected to and configured to receive direct current power from a respective solar panel. A controller unit shared by the CLMU's direct current converters is utilized to separately control the operation of each converter such that the power extracted from the solar panels is maximized. A communications unit coupled with the controller unit is utilized to facilitate communications between the controller unit and a system unit remote from the CLMU to report measurements and receive control signals.01-31-2013
20130026841Voltage Source Converter And A Method For Fault Handling Thereof - A voltage source converter having a plurality of cell modules connected in series, each cell module including a converter unit having an ac-side and a dc-side, and the voltage source converter includes a control unit adapted to control the converter units, where at least one of the cell modules includes a second redundant converter unit having an ac-side which is connected in parallel with the ac-side of the first converter unit and the control unit is configured to substantially synchronously control the first and the second converter units.01-31-2013
20100156189COLLECTION OF ELECTRIC POWER FROM RENEWABLE ENERGY SOURCES VIA HIGH VOLTAGE, DIRECT CURRENT SYSTEMS WITH CONVERSION AND SUPPLY TO AN ALTERNATING CURRENT TRANSMISSION NETWORK - Wind-generated electric power is collected in a multiple nodal arrangement where the DC output current of each node can be held constant while the DC output node voltage is allowed to vary. The DC outputs from the wind-generated power collection nodes are connected together in series and fed to a plurality of regulated current source inverters via a high voltage DC transmission link. Each inverter converts input DC power into a three phase AC output. The AC outputs of the regulated current source inverters are connected to a phase shifting transformation network that supplies three phase electric power to a conventional AC electrical transmission system. Alternatively wind-generated and photovoltaic-generated electric power is commonly collected in a nodal arrangement and transported at high voltage DC to a plurality of regulated current source inverters for supply to the conventional AC electrical transmission system.06-24-2010
20110193413Battery Control Device and Battery System - A battery control device for a battery module includes a plurality of integrated circuits. Each integrated circuit includes: a constant voltage circuit that lowers a total voltage of a battery cell group corresponding to the integrated circuit to an integrated circuit internal voltage; a signal generation circuit that generates, based upon a first signal provided by a higher-order control circuit, a second signal assuming a wave height value different from a wave height value of the first signal and outputs the second signal; and a startup circuit that includes a first comparator assuming a first decision-making threshold value corresponding to the first signal and a second comparator assuming a second decision-making threshold value corresponding to the second signal, and starts up the constant voltage circuit in response to a change in an output from at least either the first comparator or the second comparator.08-11-2011
20130033113PHOTOVOLTAIC SYSTEMS WITH VOLTAGE BALANCERS - A photovoltaic module includes N sub-modules electrically connected to each other such that the negative terminal of any one but the last sub-module is electrically connected to the positive terminal of the immediate next sub-module, and N−1 voltage balancers, each having a first terminal, a second terminal and a third terminal. The second and third terminals of any one but the last voltage balancer are electrically connected to the third and first terminal of the immediate next voltage balancer, respectively. The first terminal of the first voltage balancer is electrically connected to the positive terminal of the first sub-module. The second terminal of the last voltage balancer is electrically connected to the negative terminal of the last sub-module. The third terminal of the j-th voltage balancer is electrically connected to both the negative terminal of the j-th sub-module and the positive terminal of the (j+1)-th sub-module.02-07-2013
20130076145CAPACITOR CIRCUIT FOR ARRAYS OF POWER SOURCES SUCH AS MICROBIAL FUEL CELLS - An electronic circuit to increase voltages from one or more energy sources. The electronic circuit can include a first set of capacitors and a second set of capacitors, and a first set of switches associated with the first set of capacitors and a second set of switches associated with the second set of capacitors. Also included is at least one energy source and an external load. The first and second set of capacitors, first and second set of switches, the at least one energy source, and the external load are arranged and connected such that the first set of capacitors is connected to the at least one energy source in parallel while the second set of capacitors is connected to the external load in series, and vice versa.03-28-2013
20130076144SYSTEM AND METHOD FOR LIMITING PHOTOVOLTAIC STRING VOLTAGE - A system and method are provided for enabling a PV inverter to be connected to a string of series connected PV modules without exposing the inverter to elevated voltage stresses. The input voltage to the inverter is gradually built up by sequentially switching in more series PV modules. This system and method are simple to implement in both centralized and distributed PV power plants and in either case, it significantly increases the utilization of the PV inverter. The input switching elements can be implemented using a wide variety of parts including electro-mechanical switches, semiconductor switches (IGBTs, MOSFETs . . . , etc.) as well as MEMS devices depending on the current level and target cost. A mix of switches can also be used to assist in minimizing impedance of the final switching stage that remains connected during normal operation.03-28-2013
20100045113POWER SOURCE DEVICE AND MAGNETIC RESONANCE IMAGING APPARATUS USING THE SAME - A DC high voltage power source is constituted by an AC-DC converting means (02-25-2010
20100109440SINGLE FAULT TOLERANT ISOLATED DUAL BUS POWER INPUT CIRCUITS AND SYSTEMS - Single fault tolerant isolated dual bus power input circuits and systems are provided. One input circuit comprises a first bus and a second bus configured to be coupled to first and second power sources, respectively. The first bus includes first input and return lines, the first input or return line including a switch. The second bus includes second input and return lines, the second input or return line including two switches coupled in series. A system includes multiple power sources coupled to an electronic device via the input circuit discussed above. Another system includes multiple power sources, an electronic device, and an input circuit coupling the electronic device to the power sources. The input circuit includes multiple input lines coupling the electronic device to a respective power source, wherein each input line includes a switch coupled between the electronic device and each respective power source.05-06-2010
20120217813Storage Battery System and Storage Battery Module - A storage battery system in which multiple storage battery modules are connected in series and such that deteriorated storage battery modules may be made replaceable without causing dielectric breakdown. The storage battery system is one that has multiple storage battery modules connected in series and has a mechanism of, when the storage battery module is detached, disconnecting power source line connected to the storage battery modules after disconnecting communication line connected to the storage battery modules.08-30-2012
20120112550BOOST CONVERTER WITH MULTIPLE INPUTS AND INVERTER CIRCUIT - A boost converter with a multiple input and with improved efficiency has two or more inputs. A DC voltage source can be connected to each input. A common output carries a DC voltage whose value is greater than or equal to that of the input voltages. The common output is in each case connected to each of the plurality of inputs via a positive lead branch and a negative lead branch. At least one inductor is arranged in the positive lead branch and/or the negative lead branch from each input, and at least one rectification element is arranged in the positive lead branch and/or the negative lead branch from each input. Furthermore, the inputs can be connected in series by means of two or more switching elements via the inductors, wherein at least two of the inductors can in each case be connected in parallel.05-10-2012
20100127571Systems and Methods to Balance Solar Panels in a Multi-Panel System - Systems and methods to balance currents among a plurality of photovoltaic units connected in series. In aspect, a management unit is coupled between a photovoltaic energy production unit and a string of energy production units. The management unit has an energy storage element (e.g., a capacitor) connected to the photovoltaic energy production unit. The management unit further has a switch to selectively couple to the energy storage element and the photovoltaic energy production unit to the string. The management unit allows the current in the string to be larger than the current in the photovoltaic energy production unit.05-27-2010
20120223581METHOD AND APPARATUS FOR POWERING AN APPLIANCE - A battery operated vacuum cleaner is provided with one or more principal batteries and one or more supplemental batteries. The batteries and a controller are configured such that as the power provided by the principal batteries drops, one or more of the supplemental batteries is operative connected to provide power to the appliance. A method for providing a substantially constant level of power to an appliance, such as a vacuum cleaner, using a plurality of power sources comprises providing power from a principal power source connected to the appliance; monitoring an operating voltage supplied to the appliance to detect if the operating voltage is below a predetermined threshold voltage level; and upon detecting that the operating voltage is below the predetermined threshold voltage level, providing power from k of n supplemental power sources connected to the appliance, where k and n are positive integers, and k is less than or equal to n. Optionally, upon detecting that the operating voltage is below the predetermined threshold voltage level and where k is equal to n, the principal and supplemental power sources are disengaged from the appliance.09-06-2012
20130062955ELECTRIC POWER TOOL POWERED BY BATTERY PACK AND ADAPTER THEREFOR - An adapter is provided with a connecter portion configured to be detachably attached to the main body of the electric power tool and at least one battery receiving portion configured to be detachably attached to the battery pack. The battery pack attached to the battery receiving portion is electrically coupled with the main body of the power tool attached to the connecter portion via a power supply circuit of the adapter. The adapter is provided with a measuring portion configured to measure an index corresponding to a charged level of the battery pack and a signal receiving portion configured to receive an alarm signal outputted from the battery pack, and is configured to stop or restrict power supply to the main body of the electric power tool based upon a measurement by the measuring portion and the alarm signal that is received.03-14-2013
20090236915POWER SUPPLY DEVICE - A power supply device of the present invention includes a switching element and a switch that operate so that when a primary DC voltage source of the device is in a voltage drop state, the power of a secondary auxiliary voltage source thereof is mixed with the power of the DC voltage source in a balanced manner and supplied to a load. This structure can reduce the maxim amount of power storage necessary for the auxiliary voltage source and thus the number of power storage elements necessary for the auxiliary voltage source. Thus, a smaller power supply device can be provided.09-24-2009
20120235494 SYSTEM AND METHOD FOR BALANCING ENERGY STORAGE DEVICES - A system for balancing a series connection of energy storage devices having: an intermediate storage element coupled between a pair of sections of one or a number of adjacent energy storage devices of a series connection of energy storage devices, sections each having a more positive terminal (A) at one end and a more negative terminal (B) at its other end; and a switching device for switching sequentially between coupling terminals (A) to each other via intermediate storage element and coupling terminals (B) to each other via intermediate storage element wherein the sections are non-adjacent. A method for balancing a series connection between energy storage devices is also disclosed.09-20-2012
20120286578SERIES-PARALLEL RECONFIGURABLE CELL VOLTAGE EQUALIZATION CIRCUIT DESIGNED USING MOSFET AS SWITCHES THEREOF, AND DRIVER CIRCUIT THEREOF - [Object] It is an object to provide a circuit for equalizing voltages of energy storage cells, with less number of element and simpler circuit configuration than ever before.11-15-2012
20110291486METHOD FOR DISTRIBUTED POWER HARVESTING USING DC POWER SOURCES - A system and method for combining power from DC power sources. Each power source is coupled to a converter. Each converter converts input power to output power by monitoring and maintaining the input power at a maximum power point. Substantially all input power is converted to the output power, and the controlling is performed by allowing output voltage of the converter to vary. The converters are coupled in series. An inverter is connected in parallel with the series connection of the converters and inverts a DC input to the inverter from the converters into an AC output. The inverter maintains the voltage at the inverter input at a desirable voltage by varying the amount of the series current drawn from the converters. The series current and the output power of the converters, determine the output voltage at each converter.12-01-2011
20110291485STACKED POWER SUPPLY MONITOR WITH SENSE-REPLICA LOOP - An apparatus includes a sense module configured to be coupled to at least one power supply, where the sense module has a first leg. The apparatus also includes a replica module having a second leg, where the first and second legs have a common structure. The apparatus further includes a feedback loop configured to cause an output voltage across terminals of the replica module to at least substantially equal an input voltage across terminals of the sense module based on sense currents in the first and second legs. At least one cascode stage coupled to the sense module can be configured to reduce a voltage at which one or more signals from the sense module are referenced. One or more trim units can be used to reduce a gain error and/or an offset error between the input voltage and the output voltage.12-01-2011
20100156188Solar Photovoltaic Power Collection via High Voltage, Direct Current Systems with Conversion and Supply to an Alternating Current Transmission Network - Solar photovoltaic power is collected in a multiple nodal arrangement where the DC output voltage of each node is held constant while the DC current is allowed to vary based upon the maximum power point of the solar cells making up the solar power collectors in each node. The output of each solar power collection node is regulated by a node-isolated step-down current regulator that maintains a constant DC current output while the DC output voltage is allowed to vary. The outputs of all node-isolated step-down current regulators are connected together in series and fed to a plurality of regulated current source inverters that each convert input DC power into a three phase AC output. The AC outputs of the regulated current source inverters are connected to a phase shifting transformation network that supplies three phase electric power to a conventional AC electrical transmission system.06-24-2010
20100219690METHOD AND DEVICE FOR CONTROLLING THE OPERATION OF POWER AT THE POINT OF MAXIMUM POWER - A control method and a control device for controlling a supply unit, which enable supply of the maximum power that can be delivered by a power source, the method includes the presence of an absolute maximum on the curve of the power as a function of the voltage at the connection terminals; the supply system set between the power source and the load is preferably a DC/DC switching converter. The control circuit identifies the optimal operating point, using the relation existing between the harmonic components of the power and the harmonic components of the voltage at the terminals of the source. Starting from any value of the voltage at the connection terminals, the control circuit increments the value of the voltage if, for a given value of the frequency, the power and the voltage at the connection terminals are in phase, whilst it decrements the value of the voltage if the power and the voltage are in phase opposition.09-02-2010
20110062784Device for Distributed Maximum Power Tracking for Solar Arrays - The present invention is a system for providing power from solar cells whereby each cell or cell array is allowed to produce its maximum available power and converted by an operatively connected DC/DC converter. Each cell or cell array has its own DC/DC converter. In one form the system for providing power from solar cells includes one or more solar generators wherein each of said solar generators has one to nine solar cells; a maximum power tracker operatively associated with each solar generator, each of said maximum power tracker includes a buck type DC/DC converter without an output inductor, each of said maximum power trackers are operatively connected in series with each other; an inductor operatively connected to the series connected maximum power trackers; and means for providing electrical power from the inductor to load means, wherein each of said maximum power trackers is controlled so that the operatively associated solar generator operates at its maximum power point to extract maximum available power.03-17-2011
20090015071POWER CONVERSION APPARATUS - In a power conversion apparatus that boosts a solar light voltage, converts it to AC and supplies AC power to a load or system, a second inverter is connected in series to one of two terminals on the AC side of a first inverter that uses, as its DC source, a DC voltage boosted from a solar light voltage by a chopper circuit. A third inverter is connected in series to the other terminal. Then, output voltages of the second and third inverters are controlled to be equal, and an output voltage is provided by using the sum of the generated voltages of the first, second, and third inverters. Thus, a mid-point potential of the DC power source is made equivalent to an intermediate potential of the output voltage of the power conversion apparatus, that is, the mid-point potential (ground potential) of a system.01-15-2009
20090261655HIGH VOLTAGE ARRAY CONVERTER - A direct current to pulse amplitude modulated (“PAM” current converter, denominated a “PAMCC”, is connected to an individual source of direct current. The PAMCC receives direct current and provides pulse amplitude modulated current at its output. An array of PAMCCs constructed in accordance with the present invention form a distributed multiphase inverter whose combined output is the demodulated sum of the current pulse amplitude modulated by each PAMCC. The array is configured as a series of stages, wherein the power sources within each stage are in parallel. The series of stages provides for a high voltage AC or DC output. In some embodiments a weak power source is compensated for by adjusting the voltage or the current of the weak power source.10-22-2009
20110204722VOLTAGE EQUALIZATION CIRCUIT FOR ELECTRIC ENERGY STORAGE DEVICE - The present invention is aimed at providing a simple and inexpensive device for equalizing voltage between electric energy storage cells such as batteries or capacitors connected in serial in an electric energy storage device. The invention provides a voltage equalization device that enables voltage equalization between the electric energy storage cells by transferring the electric energy of a high voltage electric energy storage cells to a low voltage electric energy storage cell through at least one voltage equalization cell. The voltage equalization circuit according to the invention comprises: a serial string of plural electric energy storage cells connected in a serial; at least one string of voltage equalization cells which includes at least one voltage equalization cell; plural 108-25-2011
20110140531Systems, Circuits, and Methods for Voltage Matching of an Adaptive Solar Power System - A back sheet comprises an interconnect circuit coupling a plurality of solar cell tiles. A tiled solar cell, comprising a solar cell and encapsulating and glass layers, is inserted into the solar cell tiles. Each solar cell is individually addressable through the use of the interconnect circuit. Moreover, the interconnect circuit is programmable and allows for dynamic interconnect routing between solar cells. As such, the interconnect circuit may be programmed to couple solar cells to generate a solar cell string that matches a desired voltage specification.06-16-2011
20110140528CABLE BUS - A photovoltaic array cable bus system can include a cable bus and at least one electrical connector.06-16-2011
20110140532Systems, Circuits, and Methods For Generating a Solar Cell String of an Adaptive Solar Power System - A back sheet comprises an interconnect circuit coupling a plurality of solar cell tiles. A tiled solar cell, comprising a solar cell and encapsulating and glass layers, is inserted into the solar cell tiles. Each solar cell is individually addressable through the use of the interconnect circuit, The interconnect circuit is programmable and allows for dynamic interconnect routing between solar cells. As such, the dynamic interconnect routing may be configured so as to create strings of solar cells such that solar cells with an output specification are matched to solar cells with similar output specifications.06-16-2011
20110140530Power Apparatus For A High Voltage Electrical Power System - A power apparatus for a high voltage electrical power system, that includes a voltage source converter and a high voltage dc power source including one or more strings having a plurality of dc power source members connected in series, and switches configured to connect and disconnect the strings, where the switches are solid-state switches, each string is subdivided into a plurality of dc power source units each dc power source unit including a plurality of dc power source members connected in series and each dc power source unit is provided with one of the solid-state switches configured to connect and disconnect the dc power source unit, and that all solid-state switches in the string are arranged so that they are turned on and off simultaneously.06-16-2011
20110140529Battery Unit Arrangement For High Voltage Applications, Connector And Disconnector Arrangement And Method - A battery unit arrangement for high voltage applications. The battery unit arrangement includes a battery unit having a battery chassis, and a switching device. The switching device includes switching mechanism for switching the battery chassis between two positions, a first position connecting the battery chassis to a pole of the battery unit06-16-2011
20120032517DC-DC CONVERTER - A voltage drop of an output voltage of a DC-DC converter, caused by a wiring resistance, can properly be compensated at low cost. The DC-DC converter is connected to a low-voltage battery through an ignition switch and started up by the ignition switch. A transformation unit transforms a voltage inputted from a high-voltage battery and supplies the voltage to the low-voltage battery. A control circuit calculates a wiring resistance between the transformation unit and the low-voltage battery based on the voltage inputted from the low-voltage battery through the ignition switch in connecting the ignition switch and an output voltage and an output current of the transformation unit. The control circuit corrects a command value of the output voltage of the transformation unit based on the calculated wiring resistance to control the output voltage of the transformation unit. The invention can be applied to a DC-DC converter for electric-powered vehicle.02-09-2012
20090021081METHODS AND APPARATUS FOR THREE-PHASE INVERTER WITH REDUCED ENERGY STORAGE - Methods and apparatus for a circuit including first and second energy sources, a rectifier coupled to the first and second energy sources, first and second energy storage devices coupled end-to-end across the positive and negative rails, and a single three-level inverter coupled to the rectifier for providing three-phase sinusoidal output voltages.01-22-2009
20120193989OPERATING DIRECT CURRENT (DC) POWER SOURCES IN AN ARRAY FOR ENHANCED EFFICIENCY - In a solar panel array that includes a string of series-connected panels, the load current flowing through the string is measured. The peak current (Ipp) of a panel in the string is determined. A current equal to the difference of the load current and the peak current (Ipp) is generated in a current source connected across the output terminals of the panel. The panel is thereby operated at its maximum power point (MPP). To determine the peak current (Ipp) of the panel, the magnitude of current flowing through the panel is iteratively changed and the corresponding power generated by the panel is computed. The change in the current through the panel and the measurement of the corresponding power are repeated until a maximum power is determined as being generated by the panel. The maximum power corresponds to the maximum power point (MPP) and the peak current (Ipp) of the panel.08-02-2012
20100156190CURRENT PRODUCING CIRCUIT, CURRENT PRODUCING METHOD, AND ELECTRONIC DEVICE - A current producing circuit includes a first current source that applies a first current, the first current being changed at a first rate with respect to a temperature, a second current source that applies a second current, the second current being changed at a second rate with respect to the temperature, the second rate being different from the first rate, a third current source that applies a third current, the third current being changed at a third rate with respect to the temperature, a first differential output unit that supplies a first differential current based on a difference between the first current and the second current, and a computing unit that adds or subtracts the first differential current to or from the third current.06-24-2010
20100259105Connecting device for a photovoltaic solar module, method for the production thereof and solar installation with such a connecting device - A connecting device for connection to an electrical connection system of a photovoltaic solar module. The connecting device having a connector housing, at least one current-carrying component, and a plurality of diode bodies. The connector housing is positionable on the solar module, with at least one current-carrying component located in the connector housing. The plurality of diode bodies connect together with each other into a diode chain. The diode chain connects with at least one current-carrying component, and includes at least a first and second diode body, each being connected with a common diode lead.10-14-2010
20100259104BATTERY MANAGEMENT SYSTEM - A battery management system for use in multi-battery and/or multi-cell applications. The system comprises a wiring harness for connecting a plurality of batteries in an order having at least two end positions and at least one interior position, with each position being initially occupied by one of the batteries, and an interconnection mechanism connected to the harness and configured to modify the positions occupied by the batteries. The mechanism may be configured to measure a voltage of each battery and modify the positions when a voltage difference is detected. Alternatively, the mechanism may be configured to modify the positions each time a voltage drop is detected. The order may further comprise at least one out-of-service position, with the mechanism being configured to modify the positions such that the battery in the out-of-service position and at least one of the batteries in one of the end positions are reconnected to exchange positions.10-14-2010
20100237703PHOTOVOLTAIC POWER PLANT WITH MINIMIZED POWER COLLECTION LOSSES - A photovoltaic power plant design is disclosed where a two-tier DC power collection method is used in concert with specific array field geometries and equipment locations to minimize system wiring costs and/or resistive wiring losses.09-23-2010
20090212634METHOD OF CONTROLLING DC/DC CONVERTER, METHOD OF CONTROLLING DC/DC CONVERTER APPARATUS, AND METHOD OF CONTROLLING DRIVING OPERATION OF ELECTRIC VEHICLE - When a DC/DC converter switches between a primary voltage control mode, a secondary voltage control mode, and a current limiting mode as operation modes, an I-term resetting processor outputs an I term depending on the duty ratio in the operation mode before being switched to a PID processor. The PID processor performs a PID control process based on the input I term. A drive duty ratio setter outputs a drive duty ratio immediately after the control mode switching, which is substantially equal to the duty ratio in the operation mode before being switched. As a result, the duty ratios in the operation mode before being switched and the operation mode after being switched are made continuous with respect to each other.08-27-2009
20120242152METHOD FOR SEARCHING GLOBAL MAXIMUM POWER POINT - An exemplary method is disclosed for searching a global maximum power point in an arrangement comprising a series connection of photovoltaic power sources. The method can include determining a value of a reference by adding an increment to a previous value of the reference, wherein the value of the increment is determined on the basis of the power produced by the power sources.09-27-2012
20110031814PV Sub-Generator Junction Box, PV Generator Junction Box, and PV Inverter for a PV System, and PV System - A photovoltaic (PV) sub-generator junction box (02-10-2011
20110031813Method and Circuit Arrangement for Connecting at Least One String of a Photovoltaic System to an Inverter - A circuit arrangement in combination with a first string of series-connected solar modules separated into a first substring and a second substring is provided, wherein each substring includes a first terminal and a second terminal, and further in combination with a solar inverter configured to supply electrical energy from the solar modules to an AC power grid. The arrangement includes a first switch configured to selectively couple the first terminal of the first substring to a first power cable of the inverter, and a second switching circuit configured to selectively couple the second terminal of the first substring to a first terminal of the second substring at a center point, thereby coupling the first and second substrings to form the at least one string. The arrangement further includes a third switch configured to selectively couple the second terminal of the second substring to a second power cable of the inverter, and a shared actuator configured to open the first switch, the second switching circuit, and the third switch if a current between the center point and a circuit ground exceeds a threshold value.02-10-2011
20110031812VOLTAGE DETECTION DEVICE AND POWER SUPPLY SYSTEM USING SAME - A voltage detection device has: a differential voltage detection circuit, which detects a potential difference across a pair of input terminals; a multiplexer which selects two electrode terminals among electrode terminals of a plurality of series-connected battery modules, and has a sampling switch for respectively connecting the two selected electrode terminals to first and second wiring lines; a flying capacitor circuit, which acquires a voltage across the first and second wiring lines, and outputs the voltage to the pair of input terminals; and a signal generator, which applies common-mode noise to the flying capacitor circuit.02-10-2011
20110115298ELECTRIC POWER SUPPLY SYSTEM - In an electric power supply system, a plurality of batteries (05-19-2011
20110115297PHOTOVOLTAIC ASSEMBLY AND METHOD OF OPERATING A PHOTOVOLTAIC ASSEMBLY - A photovoltaic assembly is disclosed which comprises a string formed from a plurality of series-connected photovoltaic generators, and a hierarchical structure of power-exchange units, which each exchange power between neighbouring photovoltaic generators or groups of photovoltaic generators.05-19-2011
20110127839SOLAR POWER GENERATION DEVICE - A transmitting circuit is connected to a power line at current flow-in sides to solar battery strings, and a receiving circuit is connected to the power line at current flow-out sides to the solar battery strings. An attenuating circuit connected in series to a bypass diode is provided in a bypass circuit. The transmitting circuit transmits a periodic signal of a predetermined frequency to the power line. The receiving circuit receives via the solar battery strings a transmission signal transmitted from the transmitting circuit to the power line. A determining circuit determines that, when it is detected that an amplitude of a transmission signal received by the receiving circuit is attenuated by a predetermined value or more, direct-current power is conducted to the bypass circuit.06-02-2011
20100072819Bi-directional DC to DC power converter having a neutral terminal - A bidirectional DC to DC power converter includes two DC sources, two inductors respectively connected to the two DC sources, a first switch and a second switch respectively connected to the two inductors, two capacitors respectively connected to the two switches, and a third switch connected between the two inductors. The first, second and third switches are respectively connected reversely with a diode in parallel. When the third switch is alternately turned on and off and the first and second switches are always turned off, the power converter operates as a boost power converter and electric energy flows from the two DC sources to the two capacitors. When the third switch is always turned off and the first and second switches are synchronously turned on or off, the power converter operates as a buck power converter and electric energy flows from the two capacitors to the two DC sources.03-25-2010
20110068633PROTECTIVE CIRCUIT - A protective circuit for electrical connection to solar cells of a solar cell module is provided with a protective circuit that has a controlled electronic circuit arrangement. In this way, only minimal heating of the protective circuit for electrical connection of solar cells of a solar cell module occurs in operation. The controlled electronic circuit arrangement can have a trigger circuit and a switching arrangement which can be triggered by the trigger circuit, the switching arrangement being connected parallel to at least one solar cell, and in the case of shading of the solar cells, is at least temporarily activated by the trigger circuit so that a current bypass for the shaded solar cell is achieved.03-24-2011
20100253149IMBALANCE IDENTIFYING CIRCUIT, POWER SOURCE APPARATUS AND IMBALANCE IDENTIFICATION METHOD - Provided is an imbalance identifying circuit, including: a voltage detection unit for detecting a terminal voltage in each of a plurality of accumulators; a gradient acquisition unit for performing gradient information acquisition processing of suspending charge when the plurality of accumulators are being charged and acquiring, from each of the terminal voltages detected by the voltage detection unit during the suspension of charge, voltage gradient information showing an amount of change per predetermined time of each of the terminal voltages; and an imbalance identification unit for identifying whether an imbalance of the amount of charge in the plurality of accumulators has occurred by using a plurality of pieces of voltage gradient information corresponding to each of the terminal voltages acquired by the gradient acquisition unit.10-07-2010
20120200163ELECTRIC ENERGY STORAGE APPARATUS CAPABLE OF AC OUTPUT - An electric energy storage apparatus can generate an AC output in a low-loss and low-noise manner without using a DC-DC converter or an inverter. The electric energy storage apparatus comprises: an electric energy storage module group formed by connecting in series electric energy storage modules each comprising one or more electric energy storage elements; a balancing circuit electrically connected to the electric energy storage module group and configured to adjust a voltage to be applied to each of the electric energy storage modules; a first switch group comprising switches each in a path connecting a first terminal and a terminal of one of the series-connected electric energy storage modules; and a second switch group comprising switches each in a path connecting a second terminal and a terminal of one of the series-connected electric energy storage modules. The electric energy storage apparatus may perform a switch changeover in the switch groups.08-09-2012
20110254373APPARATUS FOR INVERTING DC VOLTAGE TO AC VOLTAGE - An apparatus for inverting DC voltage to AC voltage by stacking of DC voltage sources from a series of DC voltage sources comprises a plurality of circuits. Each circuit includes a first power switch, a second power switch, and a third power switch. The first power switch allows selective connection of adjacent DC voltage sources in the series to provide stacking of DC voltage sources. The second power switch allows selective connection of a first bus to a corresponding location between adjacent DC voltage sources. The third power switch allows selective connection of a second bus to a corresponding location between adjacent DC voltage sources. Controlling the plurality of power switches produces an AC voltage output by coordinating stacking of DC voltage sources and associated connections to the first bus and the second bus.10-20-2011
20110018350POWER BACK-UP SYSTEM WITH A DC-DC CONVERTER - An electromechanical system is configured with power storage for power back-up to maintain substantially uninterrupted power in the case of a main power failure. The power back-up system has a DC power source configured to be recharged, and provides power to the components with a DC-DC converter.01-27-2011
20120146420Device for Distributed Maximum Power Tracking for Solar Arrays - A system for providing power from solar cells whereby each cell or cell array is allowed to produce its maximum available power and converted by an operatively connected DC/DC converter. Each cell or cell array has its own DC/DC converter. In one form the system includes one or more solar generators wherein each solar generator has one to nine solar cells; a maximum power tracker operatively associated with each solar generator, each maximum power tracker including a buck type DC/DC converter without an output inductor, each maximum power tracker being operatively connected in series with each other; an inductor operatively connected to the series connected maximum power trackers; and means for providing electrical power from the inductor to load means, wherein each maximum power tracker is controlled so that the operatively associated solar generator operates at its maximum power point to extract maximum available power.06-14-2012
20110095612Method and apparatus to combine and condition AC power from multiple sources - This invention pertains to switching and combining more than one AC power supply using an internal controller that has external control and status functions available. The method taught in this invention is to convert all the AC power to DC, and, by varying the individual AC to DC converter output power, their contribution to the total power supplied is controlled, creating the ability to favor one source of electrical power instead of another. This is done under continuous control of a central controller that varies the DC output voltage of the individual AC to DC converter modules. The resulting DC power than goes to one or more invertors for conversion from DC to AC for general load consumption. An alternative embodiment has an electrical storage system in the DC portion of the system, so that a finite amount of energy can be stored and supplied at a later time, as needed and controlled by the central controller04-28-2011
20110095613SOLAR GENERATOR AND SOLAR CELL THEREOF DISTRIBUTIVELY PERFORMING MAXIMUM POWER POINT TRACKING - A solar generator distributively performing maximum power point tracking (MPPT) has a plurality of solar cell modules formed by electrically connecting multiple solar cells, and a power conversion and transmission unit electrically connected with two power output terminals of the solar cell module. Each of the solar cells has a solar chip having two DC power output terminals and an MPPT unit having two power input terminals electrically connected with the two DC power output terminals, and two power output terminals. The solar generator performs MPPT associated with each solar cell, thereby ensuring the output power of the entire system a maximum power. When performing MPPT in a conventional inverter, maximum power of each solar cell is effectively acquired.04-28-2011
20110148210Systems, Circuits, and Methods For Reconfiguring Solar Cells of an Adaptive Solar Power System - A back sheet comprises an interconnect circuit coupling a plurality of solar cell tiles. A tiled solar cell, comprising a solar cell and encapsulating and glass layers, is inserted into the solar cell tiles. Each solar cell is individually monitored and addressed through the use of the interconnect circuit. As such, each solar cell and the interconnect circuit may be programmed or reconfigured through reconfiguration of the interconnect circuit.06-23-2011
20100289337METHODS AND APPARATUSES FOR PHOTOVOLTAIC POWER MANAGEMENT - Methods and apparatuses for equalizing voltages across a plurality of photovoltaic units connected in series are provided. The apparatus may include a plurality of energy storage devices. In a first configuration, each of the energy storage devices is configured to be connected in parallel with one of a first set of the photovoltaic units. In a second configuration, each of the energy storage devices is configured to be connected in parallel with one of a second set of the photovoltaic units. The apparatus may also include a plurality of switches configured to switch between the first configuration and the second configuration, to equalize the voltages across the photovoltaic units.11-18-2010
20110304213Method for Use of Static Inverters in Variable Energy Generation Environments - A method to collect energy from generation systems such as, for example, wind farms or solar farms with widely distributed energy-generation equipment. In some cases, static inverters are used to feed the energy directly into the power grid. In some other cases, back-to-back static inverters are used create a high-voltage DC transmission line to collect power from multiple generation sites into one feed-in site.12-15-2011
20120038216SYSTEM FOR MULTIPLE ENERGY STORAGE AND MANAGEMENT AND METHOD OF MAKING SAME - A propulsion system includes an electric drive, a first energy storage system electrically coupled to the electric drive through a DC link, and a second energy storage system electrically coupled to the first energy storage system in a series connection. The first energy storage system comprises a high specific-energy storage device and the second energy storage system comprises a low specific-power storage device. The propulsion system also includes a third energy storage system comprising a high specific-energy storage device electrically coupled to the second energy storage system. A bi-directional boost converter is electrically coupled to the second and third energy storage systems such that a terminal of the third energy storage system is electrically coupled to a low voltage side of the bi-directional boost converter and a terminal of the second energy storage system is coupled to a high voltage side of the bi-directional boost converter.02-16-2012
20120038215SYSTEM FOR MULTIPLE ENERGY STORAGE AND MANAGEMENT AND METHOD OF MAKING SAME - A propulsion system includes an electric drive, a first energy storage system electrically coupled to the electric drive through a DC link, and a second energy storage system electrically coupled to the first energy storage system in a series connection. The first energy storage system comprises a high specific-energy storage device; the second energy storage system comprises a high specific-power storage device. The propulsion system also includes a bi-directional boost converter electrically coupled to the first and second energy storage systems such that a terminal of the first energy storage system is electrically coupled to a low voltage side of the bi-directional boost converter and a first terminal of the second energy storage system is coupled to a high voltage side of the bi-directional boost converter. The series connection bypasses the bi-directional boost converter.02-16-2012
20120038214SYSTEM FOR MULTIPLE ENERGY STORAGE AND MANAGEMENT AND METHOD OF MAKING SAME - A system for multiple energy storage and management includes a propulsion system includes an electric drive and a direct current (DC) link electrically and a first energy storage system coupled to the electric drive. The first energy storage system includes a low specific-power energy storage device (ESD). A coupling device is coupled to a first terminal of the low specific-power ESD and a second energy storage system, wherein a first terminal of the second energy storage system is electrically coupled to the electric drive through the DC link and a second terminal of the second energy storage system is coupled to the coupling device. A boost converter assembly is coupled to the first and second energy storage systems. The coupling device couples the second terminal of the second energy storage system to the first terminal of the low specific-power ESD in a series connection that bypasses the boost converter assembly.02-16-2012
20120043818Switching Circuits For Extracting Power From An Electric Power Source And Associated Methods - An electric power system includes N electric power sources and N switching circuits, where N in an integer greater than one. Each switching circuit includes an input port electrically coupled to a respective one of the N electric power sources, an output port, and a first switching device adapted to switch between its conductive and non-conductive states to transfer power from the input port to the output port. The output ports of the N switching circuits are electrically coupled in series and to a load to establish an output circuit. Each of the N switching circuits uses an interconnection inductance of the output circuit as a primary energy storage inductance of the switching circuit.02-23-2012
20110316342SOLAR POWER GENERATION SYSTEM AND METHOD - A power generation system includes integrated photovoltaic (PV) panels. Each of the integrated PV panel includes photovoltaic cells, a junction coupler coupling the photovoltaic cells in series, in parallel, or in combinations thereof, output terminals, and a DC to AC converter coupled between the junction coupler and the output terminals. The DC to AC converter includes switching devices and the integrated PV panels are coupled in series at the respective output terminals. A controller is provided in the power generation system for generation switching command signals for the switching devices of the integrated PV panels to synthesize an output voltage of the power generation system.12-29-2011
20110316343PHOTOVOLTAIC MODULE WITH INTEGRATED DIAGNOSTICS - A photovoltaic module (12-29-2011
20110316344INDUCTIVE CELL BALANCING - An energy storage cell arrangement has a shared inductor (12-29-2011
20110316345SYSTEM FOR MULTIPLE ENERGY STORAGE AND MANAGEMENT AND METHOD OF MAKING SAME - A propulsion system comprising an electric drive, a DC link electrically coupled to the electric drive, and a first energy storage system electrically coupled to the electric drive, the first energy storage system comprising at least a high specific-power energy storage device is shown. The propulsion system further includes a second energy storage system, wherein a first terminal of the second energy storage system is electrically coupled to the electric drive through the DC link and a second terminal of the second energy storage system is coupled in series with a terminal of the high specific-power energy storage device. A multi-channel bi-directional boost converter is coupled to the first energy storage system and to the second energy storage system, wherein the connection between the terminal of the high specific-power energy storage device and the second terminal of the second energy storage system bypasses the multi-channel bi-directional boost converter.12-29-2011
20120205984POWER SUPPLY DEVICE - A power supply device includes battery interfaces configured to removably receive at least three batteries and a connection circuit configured to electrically connect the at least three batteries to each other. The connection circuit is capable of connecting at least two batteries in parallel and connecting at least one other battery to the at least two parallel-connected batteries in series. According to this power supply device, it is possible to supply high power to an electric device by connecting the batteries in series. In addition, it is possible to supply almost all of the electric power stored in the batteries to the electric device, even if amount of the remaining electric power in each battery is substantially uneven.08-16-2012
20120062036Camera Controlled Solar Cells Array - A system and a method for improving the operation, utility, and exploitation of solar cell fields are introduced. The system includes all or parts of the following: a solar cells array, an interconnect matrix, a measuring sub-system for measuring environmental conditions as ambient temperature and/or ambient wind speed, and/or ambient wind direction, a direct current to alternating current inverter, a measuring sub-system for measuring on-line (instantaneous) values of working points of solar cells, and/or solar panels, and/or a group of solar panels, a camera pointed at the all of solar panels or groups of solar panels, and a digital processor that using the measured environmental conditions and the measured on-line working points data evaluates the solar cells array's maximum power point; and using partial or full meandering of the solar cells in the solar cells array, achieves near-optimal performance of the solar cells array.03-15-2012
20120205983THREE-LEVEL POWER CONVERSION APPARATUS - Wiring between semiconductor modules and a direct current power supply circuit, which construct a three-level power conversion apparatus, is made to be low inductance, so that reduction in size and cost can be attained easily.08-16-2012
20120025618Thin-Film Photovoltaic Power Element with Integrated Low-Profile High-Efficiency DC-DC Converter - A photovoltaic device includes at least one photovoltaic cell and a DC/DC converter electrically coupled to the at least one photovoltaic cell. The at least one photovoltaic cell and the DC/DC converter are integrated into a photovoltaic package.02-02-2012
20120025617Connecting Mechanism Arrangeable To A Photovoltaic Module - A connecting device which can be arranged relative to a photovoltaic module for the purpose of electrically connecting a plurality of photovoltaic modules to one another and/or to an inverter device comprising at least a housing. The housing includes a first housing element and a second housing element; first connection devices for electrical connection to the photovoltaic module arranged in the first housing element; and second connection devices for electrical connection to a further connecting device or to the inverter device of a semiconductor circuit having at least one semiconductor component arranged in the second housing element. The connecting device further includes first contact devices, which are associated with the first housing element, and second contact devices, which are associated with the second housing element. The semiconductor circuit arrangement can be electrically connected to the first connection devices.02-02-2012
20110057515THREE PHASE POWER GENERATION FROM A PLURALITY OF DIRECT CURRENT SOURCES - A direct current to pulse amplitude modulated (“PAM”) current converter, denominated a “PAMCC”, is connected to an individual source of direct current. The PAMCC receives direct current and provides pulse amplitude modulated current at its three output terminals, wherein the current of each terminal is one hundred twenty degrees out of phase with the other two terminals. The pulses are produced at a high frequency relative to the signal modulated on a sequence of pulses. The signal modulated onto a sequence of pulses may represent portions of a lower frequency sine wave or other lower frequency waveform, including DC. When each phased output is connected in parallel with the outputs of similar PAMCCs an array of PAMCCs is formed, wherein each voltage phased output pulse is out of phase with respect to a corresponding current output pulse of the other PAMCCs. An array of PAMCCs constructed in accordance with the present invention form a distributed three-phase multiphase inverter whose combined output is the demodulated sum of the current pulse amplitude modulated by each PAMCC on each phase.03-10-2011
20120119584Systems 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.05-17-2012
20100289338Methods and Apparatuses for Photovoltaic Power Management - Methods and apparatuses for equalizing voltages across a plurality of photovoltaic units connected in series are provided. The apparatus may include a plurality of energy storage devices. In a first configuration, each of the energy storage devices is configured to be connected in parallel with one of a first set of the photovoltaic units, and a voltage across a first one of the energy storage devices has a first polarity. In a second configuration, each of the energy storage devices is configured to be connected in parallel with one of a second set of the photovoltaic units, and the voltage across the first one of the energy storage devices has a second polarity that is different from the first polarity. The apparatus may also include a plurality of switches configured to switch between the first configuration and the second configuration, to equalize the voltages across the photovoltaic units.11-18-2010
20120126624HIGH EFFICIENCY WIDE LOAD RANGE BUCK/BOOST/BRIDGE PHOTOVOLTAIC MICRO-CONVERTER - Series strings of photovoltaic (PV) modules with integrated dc-dc microconverters that can function in buck, boost, or an intermediate bridge mode based on the load can harvest more energy than conventional central-inverter architectures, especially when the arrays are partially shaded or when the modules are mismatched. The integrated multi-mode dc-dc converter includes a maximum power point tracking (MPPT) algorithm that can track the true MPP, even when a PV module becomes partially-shaded, without scanning the entire output voltage range. The algorithm compares power levels only at a voltage that occurs when a bypass diode bypasses a portion of an associated PV module, and multiples thereof.05-24-2012
20120161526DC POWER SOURCE CONVERSION MODULES, POWER HARVESTING SYSTEMS, JUNCTION BOXES AND METHODS FOR DC POWER SOURCE CONVERSION MODULES - A DC power source conversion module is provided, including a DC power source module and a DC to DC conversion module. The DC to DC conversion module includes a DC to DC converter and a control module. The DC to DC converter is powered by the DC power source module to generate an output signal. The control module senses a responding signal of the DC to DC conversion module and controls the DC to DC converter according to the sensed responding signal, such that the DC power source conversion module is operated at a predetermined output power, in which the responding signal responds to the output signal of the DC to DC converter.06-28-2012
20100052428MULTI-CELL BATTERY SYSTEM, AND MANAGEMENT NUMBER NUMBERING METHOD - A multi-cell battery system includes a plurality of modules connected in series, each of the modules comprising a battery cell and a slave for monitoring a state of the battery cell, and a master for monitoring the state of the battery cell by communicating with the slave of each of the plurality of modules. The master transmits, in order, to the plurality of modules a series of numbers to be numbered on each module as a numbering signal. Each of the plurality of modules numbers the series of numbers in the series-connected order by receiving the numbering signal from the master and executing numbering based on number information contained in the numbering signal when receiving a numbering reception request signal for executing the numbering, and transmitting the numbering reception request signal to a module of a next stage in the series when the numbering is completed.03-04-2010
20120175959METHOD AND ARRANGEMENT FOR IMPROVED CONTROLLABILITY OF FUEL CELL STACKS - Exemplary systems and methods for adjusting current values in a fuel cell system for producing electricity with fuel cells, include drawing major part of the current from at least one serial connection. An adjusting circuit adjusts current values by drawing or supplying current of at least one stack of individual fuel cell stacks or current of at least one group of the groups of stacks within the serial connection. The adjusting circuit is integrated with the at least one stack of individual fuel cell stacks or with the at least one group of the groups of stacks. Compensation current of the at least one stack or group is a small percentage of a major part of the current in the serial connection of stacks.07-12-2012
20120175960Battery Management System and Method - A battery management system for use in multi-battery and/or multi-cell applications, including a wiring harness for connecting a plurality of batteries in an order having at least two end positions and at least one interior position, with each position being initially occupied by one of the batteries, and an interconnection mechanism connected to the harness and configured to modify the positions occupied by the batteries. The mechanism may be configured to measure a voltage of each battery and modify the positions when a voltage difference is detected. Alternatively, the mechanism may be configured to modify the positions each time a voltage drop is detected. The order may further comprise at least one out-of-service position, with the mechanism being configured to modify the positions such that the battery in the out-of-service position and at least one of the batteries in one of the end positions are reconnected to exchange positions.07-12-2012
20120313440SOLAR SYSTEM FOR GENERATING ELECTRIC POWER - A solar power generation system for providing operating power for a desired application, the system includes one or more solar-array modules, wherein each of the one or more solar-array modules includes a multiplicity of solar cells and a high efficiency DC to DC power converter. The multiplicity of solar cells is arranged in strings of serial-units electrically connected in parallel to form a crisscross matrix array of solar cells, which matrix allows currents to bypass malfunctioning cells, thereby improving the performance of the system. The power converter includes fast MOSFET transistors having duty cycle that is operationally constant and is almost 50%. Optionally, the power converter includes a plus conductive pad and a minus conductive pad, wherein each of the strings of serial-units is individually wired to the plus conductive pad and the minus conductive pad.12-13-2012
20120261996PHOTOVOLTAIC SYSTEM WITH OVERVOLTAGE PROTECTION - A photovoltaic system having a photovoltaic generator, whose strings with series-connected photovoltaic modules have a positive pole and a negative pole, and with an inverter whose DC input is connected to the two poles. The voltage of the positive pole and/or of the negative pole is measured with respect to ground, and a first switching element located between the positive pole and the DC input of the inverter and/or a second switching element located between the negative pole and the DC input of the inverter is opened, while a third switching element located between the positive pole and the negative pole is closed, when the voltage of the positive pole or of the negative pole exceeds a predefined first or second limit value.10-18-2012
20120228945POWER CONVERTER - A power converter can be configured of a first series circuit, formed from a first semiconductor switching element and a second semiconductor switching element connected in series to either end of a direct current voltage supply series circuit formed from a first direct current voltage supply and a second direct current voltage supply connected in series, and a second series circuit, formed from a third semiconductor switching element and a fourth semiconductor switching element connected in series between a connection point of the first direct current voltage supply and the second direct current voltage supply and a connection point of the first semiconductor switching element and the second semiconductor switching element. The first semiconductor switching element and the third semiconductor switching element can be configured of a first semiconductor device, and the second semiconductor switching element and the fourth semiconductor switching element can be configured of a second semiconductor device.09-13-2012
20110121655INVERTER WITH UNINTERRUPTIBLE POWER SUPPLY FOR WATER PUMP - An inverter with uninterruptible power supply for a water pump includes a plurality of DC cells connected in series to form a cell unit providing a DC power source approximately equal to a working voltage. A frequency conversion/voltage stabilizing circuit has an input side electrically connected to the DC power source and an output side electrically connected to a water pump. The frequency conversion/voltage stabilizing circuit is capable of providing conversion between AC and DC and changing output AC power frequency and output voltage. The output side outputs an AC power with an AC working voltage to the water pump. The effect and operational stability of the water pump can be enhanced.05-26-2011
20120299384ENERGY STORAGE AND GENERATION SYSTEMS - This disclosure relates to energy storage and generation systems, e.g., combination of flow battery and hydrogen fuel cell, that exhibit operational stability in harsh environments, e.g., both charging and discharging reactions in a regenerative fuel cell in the presence of a halogen ion or a mixture of halogen ions. This disclosure also relates to energy storage and generation systems that are capable of conducting both hydrogen evolution reactions (HERs) and hydrogen oxidation reactions (HORs) in the same system. This disclosure further relates to energy storage and generation systems having low cost, fast response time, and acceptable life and performance.11-29-2012
20120319490Parallel Connected Inverters - A distributed power system wherein a plurality of power converters are connected in parallel and share the power conversion load according to a prescribed function, but each power converter autonomously determines its share of power conversion. Each power converter operates according to its own power conversion formula/function, such that overall the parallel-connected converters share the power conversion load in a predetermined manner.12-20-2012
20120319489Power Shuffling Solar String Equalization System - A photovoltaic (PV) array system may include multiple PV strings, each PV string including respective PV panels coupled in series. Each PV string may be coupled in series with a first terminal of a respective string equalizer module. The string equalizer module may equalize a maximum power-point voltage (V12-20-2012
20130009483POWER GENERATOR MODULE CONNECTIVITY CONTROL - A remote resource can be configured to control connectivity of the power generator modules in a string. For example, a respective power generator module can include a current sense circuit that monitors for presence of communication signal. The power generator module can monitor for a presence of a remotely generated control signal over power line that is used by the respective power generator module to convey power to the external load. If the control signal is present on the power line, as generated by the remote resource, the control circuit in the respective power generator module activates the switch to an ON state such that respective activated power generator module is connected in series with the other activated power generator modules. If no keep-alive control signal is detected within a timeout period, the controller deactivates the respective power generator module.01-10-2013
20120280571VOLTAGE COMPENSATION - An apparatus is provided for producing a compensated voltage output comprising at least one photovoltaic module biasing means connected in series with the at least one photovoltaic module. The biasing means is operable to generate a controllable bias voltage for modulating an output voltage of the at least one photovoltaic module to produce the compensated voltage output.11-08-2012
20120280572BATTERY SYSTEMS AND CONTROLLERS - A battery system includes battery cells and a control circuit having a control pin. The control circuit determines a condition of the battery cells according to cell parameters of the battery cells. The control circuit compares a voltage at the control pin with a first voltage threshold to select an operation mode from a first mode and a second mode. In the first mode, the control circuit compares the voltage at the control pin with a second voltage threshold and generates a control signal based on a result of the comparison, such that the control signal is generated if the battery cells remain in the condition for a time period that reaches a first time threshold. In the second mode, the control circuit generates the control signal if the battery cells remain in the condition for a time period that reaches a second time threshold.11-08-2012
20130009484Green Power Converter - The invention discloses a green power converter which omits the pulse width modulation (PWM) technique in the traditional power converter, does not have high-frequency power device, does not generate EMI interference, simultaneously adopts the symmetry basic primitive (SBP) technique, the amplitude high modulate (AHM) technique and the dynamic rectification (DR) technique, and only needs to perform traditional power conversion on a small part of the input power so as to acquire the whole output power, namely that a large part of the output power neither need traditional power conversion nor need to pass through a magnetic core transformer. The input AC voltage neither needs to be rectified and filtered nor has large inductance and large capacitance, thus the power factor is 1, and the total harmonic distortion (THD) is 0. A transformer secondary side adopts dynamic rectification, can acquire a DC circuit, and can also acquire an AC voltage. The circuit complexity, the power consumption and the failure rate of the whole green power converter are greatly lowered, and the power converter can be applied in all the fields to replace the traditional power converter.01-10-2013
20100127570Systems and Methods for Using a Power Converter for Transmission of Data over the Power Feed - Apparatuses and methods include a photovoltaic energy production unit to generate electricity. A local management unit is coupled between the photovoltaic energy production unit and a connection of energy production units forming a string bus. The local management unit includes a controller and switching circuitry. The controller provide a control for the switching circuitry to deliver electrical energy to the string bus. A communication transmission modulator is associated with the local management unit. The communication transmission modulator modulates the control with data to be transmitted from the local management unit over the string bus.05-27-2010
20120242153DC Power Source For A High Voltage Power Apparatus - A dc power source for a high voltage power apparatus, the dc power source including one or more strings including a plurality of dc power source units connected in series, and switches configured to connect and disconnect said strings. The switches are solid-state switches distributed among the power source units of each string, and all solid-state switches in the string are arranged so that they are turned on and off simultaneously. Each switch is connected in parallel with a first controllable semiconductor in a first direction and connected in parallel with a second controllable semiconductor in a second direction which is opposite to the first direction, and the dc power source includes a control unit configured to bypass a failed switch by triggering the forward biased of the first or second controllable semiconductor connected to the failed switch in case a fault in the switch is detected.09-27-2012
20130093248INDUCTOR-BASED ACTIVE BALANCING FOR BATTERIES AND OTHER POWER SUPPLIES - A system includes multiple power supplies connected in series and an active balancing circuit. The active balancing circuit includes an LC resonance circuit and multiple switches configured to selectively couple different ones of the power supplies to the LC resonance circuit. The LC resonance circuit includes an inductor, a capacitor, and an additional switch. The inductor is configured to store energy to be transferred between two or more of the power supplies. The additional switch is configured to selectively create a resonance between the inductor and the capacitor in order to reverse a direction of a current flow through the inductor. The active balancing circuit can transfer energy between individual power supplies or groups of power supplies.04-18-2013
20110273023BATTERY APPARATUS - A battery apparatus includes a row battery group including a plurality of series-connected row batteries including one or more battery cells; a plurality of battery management sections, corresponding to the individual row batteries, for managing the battery statuses of the corresponding row batteries; a central management section for granting unique identification information to the individual battery management sections and acquiring information about the battery statuses of the row batteries from the respective battery management sections for management; second communication lines with which the plurality of battery management sections are daisy-chained; a first communication line with which, of the plurality of battery management sections, the battery management section located at one end is connected to the central management section; and a plurality of connection switching sections, provided in the individual second communication lines between the battery management sections, for switching the connection and disconnection between the battery management sections.11-10-2011
20100308660POWER HARVESTING CIRCUIT AND METHOD FOR SERIALLY COUPLED DC POWER SOURCES - Circuitry and method for maximizing power from multiple DC power sources mutually coupled in series and providing unequal DC currents. Current related to the difference between the unequal DC currents is diverted from the serially coupled sources, captured as magnetic field energy and then added to the DC current provided by the serially coupled sources.12-09-2010
20120274142BATTERY ENERGY STORAGE SYSTEM WITH SHORT CIRCUIT PROTECTION, AND METHOD - A battery energy storage system including a control unit and a plurality of battery units. The battery units are arranged in series, and each battery unit includes a semiconductor switch and a battery module including a plurality of battery cells. Each battery module is connected in series with a respective semiconductor switch, and the control unit is operatively connected to the semiconductor switch and adapted to control the semiconductor switch of every battery unit.11-01-2012
20130154379ENERGY STORAGE DEVICE, SYSTEM WITH ENERGY STORAGE DEVICE AND METHOD FOR DRIVING AN ENERGY STORAGE DEVICE - An energy storage device. An energy supply branch, with a plurality of energy storage modules is connected in series via first module connections along a first energy supply line and via second module connections along a second energy supply line. The energy storage modules include an energy storage cell module having an energy storage cell, a first coupling device having first coupling elements, configured to switch or bypass the energy storage cell module selectively between the first module connections, and a second coupling device having second coupling elements, which are designed to switch or bypass the energy storage cell module selectively between the second module connections. The energy storage device also includes an output connection coupled to an output of the first energy supply line; and two additional connections coupled to the outputs of the second energy supply line.06-20-2013
20130154380Method for Controlling Individual Photovoltaic Modules of a Photovoltaic System - A method for switching photovoltaic (PV) modules in a PV system to a safe state in the case of a hazard is described. Control units, each one associated with a corresponding one PV module, measure the voltage profile and/or the current of each associated PV module. Should the voltage of a PV module increase from the operating voltage to the idle voltage or, conversely, drop from the idle voltage to the operating voltage, or the current in the phase fall below a reference value, then the control unit associated with the PV module is activated. When activated, the PV module is either isolated from the phase on at least one connection side, with the result of at least one isolation location having a capacitor remaining connected in parallel with it, or a low-impedance load is connected in parallel to the PV module in a clocked fashion.06-20-2013
20110278935Ripple Cancellation - Systems, methods and devices for power generation systems are described. In particular, embodiments of the invention relate to the architecture of power conditioning systems for use with fuel cells and methods used therein. More particularly, embodiments of the present invention relate to methods and systems usable to reduce ripple currents in fuel cells.11-17-2011
20120293003CELL CAPACITY ADJUSTING DEVICE - Provided is a cell capacity adjusting device for reducing fluctuations in state of charge (SOC) among cells of a battery pack 11-22-2012
20130200710Solar Power Module with Safety Features and Related Method of Operation - A solar power module, and related method of operation, that protects the bypass diodes in the solar power module from overheating due to partial shading, and also protects firefighters and installer personnel from electrical shock hazard. The solar power module includes active bypass switches, and isolation switches that disconnect the PV cells from the bypass switches when all the bypass switches are closed concurrently, thereby allowing the PV cells to continue supplying power to the control circuitry. The isolation switches are also used to maintain the solar power module in a safe state during installation, or in case of fire.08-08-2013
20130200711SOLAR POWER CONVERSION SYSTEM - A power conversion system (08-08-2013
20130200709Techniques for Grid Coupling Photovoltaic Cells Using Ratiometric Voltage Conversion - Techniques for electrical power transfer in photovoltaic systems are provided. In one aspect, a photovoltaic system includes an array of photovoltaic power producing elements (e.g., concentrator photovoltaic cells); a power receiving unit; and at least one ratiometric DC to DC converter connected to both the array of photovoltaic power producing elements and the power receiving unit. The array of photovoltaic power producing elements can include a plurality of the photovoltaic power producing elements connected in series or in parallel. In another aspect, a method of transferring electrical power from an array of photovoltaic power producing elements to a power receiving unit includes the following step. At least one ratiometric DC to DC converter is connected to both the array of photovoltaic power producing elements and the power receiving unit. The at least one ratiometric DC to DC converter is configured to alter a voltage output from the array.08-08-2013
20130099575POWER DISTRIBUTION SYSTEM - A power distribution system includes: a master cell; a plurality of power cells, each power cell including a plurality of nodes capable of delivering power to a load; a maintenance cell configured to present at least one of (i) information to be forwarded to the plurality of power cells or (ii) information received from the plurality of power cells; and a communication bus for distribution of data between at least one of the master cell and one of the power cells or the power cells themselves.04-25-2013

Patent applications in class Series-connected sources

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