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BATTERY-FED MOTOR SYSTEMS

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318 - Electricity: motive power systems

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DocumentTitleDate
20120169257Power Switching Circuitry - Power switching circuitry has a heat absorbing structure, and a heat conductive substrate having power switching components on a first surface and a second surface adjacent to the heat absorbing structure. Electrically conductive members, comprising first and second members, are on the first surface and extend along a first axis orthogonal to the heat conductive substrate. The second portion is more remote from the heat conductive substrate, and has a smaller cross-sectional area than, the first portion to define a shoulder region orthogonal to the first axis. A circuit board is located on the shoulder regions, with the second portions extending through the circuit board. An urging mechanism urges the circuit board against the shoulder regions, whereby the electrically conductive members provide a current path between the heat conductive substrate and the circuit board, and urge the heat conductive substrate into thermal contact with the heat absorbing structure.07-05-2012
20110193504POWER CONVERTER CONTROL APPARATUS - Generation voltage control or generation torque control is performed as suitable control based on an external command or a load of a generator motor, to thereby prevent a rapid change of a generation torque or excessive power generation. A power converter control apparatus includes: a power conversion unit including a bridge circuit for controlling energization of an armature winding and a field circuit for controlling energization of a field winding; and a control device including B-terminal voltage detection means, field current detection means, generation voltage control means, generation torque control means, and control selection means. The control selection means selects the one of the generation voltage control means and the generation torque control means based on one of a command from an outside and a load of the generator motor.08-11-2011
20130076279METHOD AND DEVICE FOR STARTING AN ELECTRIC MOTOR - A method for starting an electric motor having a rotor, comprising the following steps: —driving the rotor with a first torque in a first rotational direction, wherein a maximum value of the first torque is not higher than a maximum countertorque acting counter to the rotation of the rotor, so that the rotor comes to a standstill in a first stationary position; —driving the rotor starting from the first stationary position in a second rotational direction that is counter to the first rotational direction until the rotor comes to a standstill in a predefined second stationary position; and —starting from the rotor in the first rotational direction starting from the second stationary position.03-28-2013
20130076278METHOD AND APPARATUS FOR INCREASING THE RUN TIME OF AN ELECTRIC CART - A method and apparatus for improving the run duration of an electric motor powered by a battery pack is provided. The apparatus includes an electric motor having a rated motor voltage, a battery pack having an output voltage exceeding the rated motor voltage, and a motor controller which converts the output voltage to supply electrical power to the electric motor at a second voltage lower than the output voltage.03-28-2013
20130076277SYSTEM AND METHOD FOR CURRENT ESTIMATION FOR OPERATION OF ELECTRIC MOTORS - Methodologies and systems are provided for current estimation in electric motor. The system comprises an electric motor having sensors for sensing at least motor current, motor temperature and motor speed. A vehicle controller is coupled to the sensors and includes a closed-loop current control system for the electric motor having a current compensation circuit for providing a current compensation signal that is used to adjust a current command for the electric motor. The current compensation circuit includes a short-circuit current calculator for providing a short-circuit current value based upon the motor temperature and the motor speed, a compensation gain calculator for providing a gain compensation value based upon the motor speed, and circuitry for combining the motor current, the short-circuit current value and the gain compensation value to provide the current compensation signal. Methods for current estimation in electric motor are also provided.03-28-2013
20100045216REDUCTION OF START-UP SEQUENCE - The present invention relates to a method for bringing a brushless motor, such as a multiphase brushless motor, operatively connected to for example a compressor into an optimal angular starting position in an energy saving manner, the method comprising the steps of applying a first drive voltage to a first phase winding of the motor and measuring a current flowing in another phase winding of said motor, said current being generated in response to the first drive voltage applied to the first phase winding. The method further comprises the step of switching the applied first drive voltage off when said current reaches a steady-state condition. By applying the method of the present invention a significant amount of power can be saved. The present invention further relates to a system for carrying out the present invention.02-25-2010
20100045215MOTOR DRIVING APPARATUS - A motor driving apparatus for a cleaning appliance includes a battery source and a power controller. The battery source supplies the power controller with an output having a first voltage which decreases as the battery source is discharged. The power controller modulates the output to produce a drive signal for driving a motor that has a second voltage and a variable duty cycle. The power controller increases the duty cycle of the drive signal as the first voltage decreases in order to maintain the second voltage at a substantially constant average value per unit time. By providing the above arrangement, the motor can be supplied with a constant voltage throughout the available run time of the battery. When forming part of a cleaning appliance having a motor, the above arrangement allows the motor to operate at a substantially constant speed throughout the run time of the battery.02-25-2010
20130038251MOTOR CONTROL DEVICE - A motor control device has a drive circuit that drives an electric motor with a battery as a power supply, a switch element that is provided between the battery and the drive circuit, the switch element supplying a current from the battery to the drive circuit when being turned on, the switch element cutting off the current from the battery to the drive circuit when being turned off, a rotation speed detector that detects a rotation speed of the electric motor, and a controller that operates the drive circuit to control the electric motor. The controller turns on the switch element when the rotation speed of the electric motor, which is detected by the rotation speed detector, is greater than or equal to a first predetermined value during stopping of the control of the electric motor.02-14-2013
20130038252METHOD FOR REDUCING THE STARTING CURRENT OF A MULTI-PHASE MACHINE OPERATED BY BLOCK COMMUTATION - In a method for reducing the starting current of a multi-phase machine operated by block commutation, which includes a battery, one high side switch for each phase, a low side switch and a phase winding as well as a rotor, the high side switch assigned to one current phase or the low side switch assigned to one current phase is held in the closed state, and the low side switches or the high side switches assigned to the other current phases are alternately controlled.02-14-2013
20130038253MOTOR DEVICE AND POWER TOOL - A motor device includes an electric motor operated when supplied with power from a rechargeable battery, a voltage detection unit that detects voltage of the rechargeable battery, a determination unit that performs an abnormality determination based on a comparison of the voltage of the rechargeable battery, which is detected by the voltage detection unit, and a determination value, a control unit that controls the operation of the electric motor in accordance with the determination result of the determination unit, and a temperature detection unit that detects the usage environment temperature. The determination unit changes the determination value in accordance with the temperature detected by the temperature detection unit and performs the abnormality determination based on the changed determination value.02-14-2013
20130082628DC-DC CONVERTER - A DC-DC converter is configured with a voltage-source power converter at a primary side of a transformer, a current-source power converter at a secondary side of the transformer, and a controller. The DC-DC converter is connected between a storage battery and an inverter that drives an electric motor. The controller generates a first control input based on a voltage between input and output terminals of the voltage-source power converter, a second control input based on a voltage between input and output terminals of the current-source power converter, and a command value for PWM or PFM control based on the first and second control inputs and an input-output current flowing between one of the input and output terminals of the voltage-source power converter and the current-source power converter. Therefore, it is easy to switch between a powering state and a regenerating state.04-04-2013
20130082627MOTOR CURRENT DETECTION APPARATUS, MOTOR CONTROLLER, AND ELECTRIC POWER TOOL - A motor current detection apparatus in the present invention includes: a current detection unit, a first filter, and a second filter. The detection unit detects a conduction current flowing from a battery to a brushless motor and outputs a conduction current signal corresponding to the detected conduction current. The first filter extracts a first current signal which is included in the conduction current signal outputted from the detection unit and is a signal component in a frequency band equal to or lower than a predetermined first cutoff frequency. The second filter extracts a second current signal which is included in the conduction current signal outputted from the detection unit and is a signal component in a predetermined frequency band within a frequency band equal to or lower than a predetermined second cutoff frequency higher than the first cutoff frequency and having the second cutoff frequency as a maximum value.04-04-2013
20120181954ENERGY STORAGE DEVICE - Energy storage device for storing electric energy for the partial or complete electrical drive of a vehicle, wherein the device has energy storages and power storages, a drive unit of a vehicle with an energy storage device as well as method for operating an energy storage device.07-19-2012
20120181953DUAL BIPOLAR MAGNETIC FIELD FOR ROTARY HIGH-VOLTAGE CONTACTOR IN AUTOMOTIVE LITHIUM-ION BATTERY SYSTEMS - A device and method for operating automotive battery system relays and related switches. By aligning a magnetic field with a direction of current flow in a contact plate disposed between magnets that are producing the field, a generated Lorentz force can be used to promote arc extinguishing during a relay opening sequence, while simultaneously reducing the tendency of the Lorentz forces to interfere with the operation of a solenoid or other switch-activating mechanisms. By using a rotary-based mechanism to establish contact between a contact plate and current-carrying terminals, the likelihood of inadvertent opening of the relay is reduced. Such devices and methods may be used in conjunction with hybrid-powered and electric-powered vehicles.07-19-2012
20130049648DIRECT CURRENT BUS MANAGEMENT CONTROLLER - A direct current bus management system can include a power management and distribution unit, having a source management section, a bus management section coupled to the source management section, a load management section coupled to the bus management section, a DC bus coupled to the power management and distribution unit, a plurality of DC sources coupled to the source management section and a plurality of loads coupled to the load management section, wherein the bus management section is configured to reconfigure excess DC power on the DC bus from the DC inputs from the plurality of DC sources based on a plurality of priorities, a plurality of feedback signals and a plurality of system parameters.02-28-2013
20130088177DEVICE AND METHOD FOR POWER-SAVING DRIVING OF DEVICE HAVING SAME LOAD PATTERN - A power-saving driving device is provided for a device 04-11-2013
20130069565Circuit For A Small Electric Appliance With An Accumulator And Method For Measuring A Charging Current - A circuit for a small electric appliance is disclosed. The circuit includes a battery (B); a control circuit (uC) for measuring the charging current of the battery (B); a DC-DC converter (DC/DC) which supplies the control circuit (uC) from the battery; and a current sensing resistor (R03-21-2013
20130069564POWER CONTROLLER - There is provided a power controller including a drive circuit connected to a DC power supply to apply a first voltage to the drive circuit and configured to supply power to an external load, a current detection circuit configured to detect a current flowing in the drive circuit by converting the current into a second voltage corresponding to the current, and a current-voltage control unit configured to generate a reference voltage corresponding to a limit value of the current flowing in the drive circuit when the first voltage is applied to the drive circuit, and configured to control the drive circuit to operate in a desired current according to the first voltage, based on a comparison result of the reference voltage and the second voltage.03-21-2013
20120217905Electric Vehicle Self Charging System - A self-charging system for an electric vehicle comprising: an alternator system, or said alternator system is connected to one axle of the vehicle; a distribution module, where the distribution module receives power from the alternator system; and a battery charger apparatus, where said battery charger apparatus charges a battery pack, when the battery pack power drops to a predetermined level and the charger receives power via the distribution module. The self-charging system may further include a motor, where the motor provides power to a drive chain of the vehicle and receives power from the battery pack. The motor receives power supplied by the alternator system via the distribution module after the battery pack is fully charged. Preferably, the alternator system initiates supply of power to the distribution module at a predetermined RPM.08-30-2012
20130057182SELF-CONTAINED MOTORIZATION SYSTEM - The invention relates to a self-contained motorization system comprising at least one electric motor (03-07-2013
20090091277Dust extractor for a battery-operated electric hand-held power tool - A dust extraction module (04-09-2009
20120223663CONTROLLABLE DIRECT CURRENT MOTOR HAVING A MODIFIED CHARACTERISTIC - A direct-current motor is disclosed, preferably in the form of an EC motor, which has a matching arrangement in order to vary its rotation-speed/torque characteristic, having a permanently effective control circuit for controlling the motor, which control circuit is programmed such that the rotation-speed/torque characteristic is permanently varied with respect to rated operation or operation with the matching arrangement.09-06-2012
20120223662MOTOR SPEED CONTROL SYSTEM - This present utility involves a motor control system which can be connected with Wi-Fi and Bluetooth. It comprises of a motor, a power supply and a cooling fan, wherein the power supply, the motor and the control circuit board are connected with the cooling fan. There is also a speed control circuit connected with the cooling fan, wherein there is a mode of Wi-Fi and/or Bluetooth in the control circuit, of which it can connect with all kinds of device which has mode of Wi-Fi and/or Bluetooth. This present utility can connect with electronic devices via Wi-Fi and/or Bluetooth for processing mode conversion thereof.09-06-2012
20090237012CORDLESS POWER TOOL AND BATTERY DEVICE USED FOR SAME - A power tool, having attached thereto a battery device including one or a plurality of cell assemblies, includes a motor which is supplied with a DC current from the battery device, a switching element which controls a drive and a stop of the motor, means which detects a number of cell assemblies, and control means which controls the switching element in such a way as to stop the drive of the motor when the number of cell assemblies is smaller than a prescribed value.09-24-2009
20110018476CABLE ASSEMBLY FOR MULTIPLE BATTERIES - A vehicle battery cable has a plurality of subsidiary or daughter cables where the subsidiary cables have the same length and gauge and exhibit closely matched resistance. The vehicle battery cable connects a plurality of batteries in parallel to a load in a way that each battery carries the same proportion of the load as every other battery.01-27-2011
20120235605INVERTER/CHARGER INTEGRATED DEVICE AND METHOD FOR CONTROLLING THE SAME - An inverter/charger integrated device is provided. The inverter/charger integrated device includes: a three-phase motor; a rectifying unit configured to rectify AC power for charging a battery and output the rectified AC power to a neutral point of the three-phase motor; a rectifier/inverter integrated unit configured to be connected to the rectifying unit and charge the battery; and a control unit configured to control the charging of the battery and an operation of the three-phase motor.09-20-2012
20120229056BATTERY PACK WITH SAFETY DEVICE, CONTROL DEVICE AND CONTROL METHOD - A battery pack (09-13-2012
20110285331OSCILLATOR CIRCUIT WITH FREQUENCY SWEEP FUNCTION - With an oscillator circuit with a frequency sweep function, a first counter counts a reference clock for a number of counts that corresponds to a digital first setting signal, and generates a first count completion signal which is asserted on completion of the count. A D/A converter converts a digital second setting signal into an analog control voltage. A VCO oscillates with a frequency according to the control voltage. When the first count completion signal is asserted, the VCO is reset. An output combining unit receives the output signal of the VCO, generates the output signal of the oscillator circuit, and generates the first setting signal and the second setting signal.11-24-2011
20120098470ELECTRONIC CONTROL UNIT INCLUDING DISCHARGING CIRCUIT WITH PLURALITY OF RESISTORS CONNECTED IN SERIES - An electronic control unit mounted on a vehicle includes: a capacitor that smoothes voltage of a DC power source electrically isolated from a body of the vehicle; a resistor circuit including a plurality of resistors connected in series, which is connected in parallel to the capacitor to discharge electric charge stored in the capacitor; and a fault judging circuit that judges whether or not the resistor circuit is in a fault condition by comparing the voltage across the resistor included in the resistor circuit with a fault threshold value. The fault judging circuit is adapted to change the fault threshold value based on the voltage of the DC power source.04-26-2012
20100264857ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus includes a charge-discharge circuit including a circuit charging an auxiliary power supply by turning on and off an MOS-FET for voltage boosting and that selectively configures a first output mode in which an electric power is supplied to a motor by a first electrical conduction path to which a voltage of a battery is applied or a second output mode in which the electric power is supplied to the motor by a second electrical conduction path to which a voltage of a source of the series-connected battery and auxiliary power supply is applied. When a failure of the battery is detected, the electric power steering apparatus connects the first conduction path to an electrical conduction path to ground by continuously holding the MOS-FET in an on-state and drives the charge-discharge circuit to select the second output mode, thereby configuring a circuit to supply the motor with the electric power only from the auxiliary power supply.10-21-2010
20090033252DOUBLE ENDED INVERTER SYSTEM FOR A VEHICLE HAVING TWO ENERGY SOURCES THAT EXHIBIT DIFFERENT OPERATING CHARACTERISTICS - A double ended inverter system for an AC electric traction motor of a vehicle is disclosed. The inverter system serves as an interface between two different energy sources having different operating characteristics. The inverter system includes a first energy source having first operating characteristics associated therewith, and a first inverter subsystem coupled to the first energy source and configured to drive the AC electric traction motor. The inverter system also includes a second energy source having second operating characteristics associated therewith, wherein the first operating characteristics and the second operating characteristics are different, and a second inverter subsystem coupled to the second energy source and configured to drive the AC electric traction motor. In addition, the inverter system has a controller coupled to the first inverter subsystem and to the second inverter subsystem. The controller is configured to influence operation of the first inverter subsystem and the second inverter subsystem to manage power transfer among the first energy source, the second energy source, and the AC electric traction motor.02-05-2009
20100270955MOTOR DRIVE CONTROL DEVICE - There is provided a motor drive control device which allows an improvement in fuel efficiency in terms of electric power while preventing the battery voltage from falling below the lower limit as rectangular wave control is performed. A motor drive control device 10-28-2010
20110260659CONTROL APPARATUS OF ELECTRIC VEHICLE - A control apparatus of an electric vehicle, which is operable to be driven by supplying electric power from a battery to an electric motor to drive the electric motor and operable to perform regeneration charge, includes: a request torque calculating unit calculating a request torque of the electric motor; a motor control unit controlling the electric motor based on the request torque; and a torque suppression unit performing a feed forward control for setting the request torque based on a rotational angular speed of the electric motor so that an integrated value of a torque and a rotational angular speed of the electric motor at time when the electric motor is driven or the regeneration charge is performed is identical to an integrated value of the torque and the rotational angular speed stored at a point of time when the battery voltage or the battery current reaches the limit level.10-27-2011
20100084999Battery powered vehicular power generation system - A battery powered system using a battery operated hydraulic pump to spin a weighted flywheel which is connected to a generator that generates electricity used to power all of the energy requirements for a vehicle. This system will use dual strings of batteries where one string of batteries can be recharging while the other string is supplying the power to the hydraulic pump.04-08-2010
20090206779MOTOR VEHICLE - A system and method for operating, or electrically communicating with, an electrical supply network are disclosed. A vehicle is coupled to the electrical supply network, a trigger causes a partial discharge of an electrical energy storage device of the vehicle into electric power network, discharging electrical energy into the electric power network from the vehicle.08-20-2009
20090261761WORKING VEHICLE - A crawler type power shovel vehicle (10-22-2009
20110012542DRIVE SYSTEM FOR POWER SWITCHING ELEMENTS - A drive system has a low voltage system, a high voltage system, and a transformer. The high voltage system has drive units which correspond to power switching elements. A capacitance in the high voltage system serves as a flouting power source which supplies electric power to each of the drive units. An output voltage of a secondary side coil of the transformer is supplied to the capacitance. A comparator compares the output voltage at the secondary side coil of the transformer with a threshold value. A switching speed change part changes the switching speed of each of the power switching element based on the comparison result of the comparator.01-20-2011
20110199028Moving Object, Wireless Power Feeding System, and Wireless Power Feeding Method - An object is to provide a moving object structure capable of reducing power loss caused when power is supplied from a power feeding device to a moving object by wireless communication. Another object is to provide a moving object structure capable of reducing the intensity of radio waves radiated to the surroundings. A moving object having a plurality of antennas receives radio waves transmitted from a power feeding device. At least one of the plurality of antennas is installed apart from the other antenna(s) of the moving object. Then, the radio waves transmitted from the power feeding device are received by all the plurality of antennas and converted into electric energy. Alternatively, the radio waves transmitted from the power feeding device are received by one or more selected from the plurality of antennas and converted into electric energy.08-18-2011
20080290824APPARATUS AND METHOD FOR CONTROLLING OPERATION OF MOTOR - An apparatus for controlling a motor includes an inverter to convert a DC voltage into an AC voltage, a power selecting circuit to select external power or power from the inverter, and a controller to control operation of the power selecting circuit according to a load of the motor.11-27-2008
20130181640DRIVER FOR SWITCHING ELEMENT AND CONTROL SYSTEM FOR ROTARY MACHINE USING THE SAME - In a driver, a changing module changes a rate of discharging the control terminal of a switch at least between a first value and a second value lower than the first value. A measuring module measures a value of a parameter as a function of a current flowing through the conductive path of the switch during a drive signal being in an on state. A control module controls the changing module, as a function of the value of the parameter, to select the first value or the second value as the rate of discharging the control terminal of the switch upon the drive signal directing a change from the on state of the switch to an off state thereof. The control module discharges the control terminal of the switch using the selected value as the rate of discharging the control terminal of the switch.07-18-2013
20120293096Power Tool and Battery Pack for Use Therein - To prevent or suppress a secondary battery used in a power tool from being deteriorated, a battery property, such as internal resistance of the battery, and a battery status of the secondary battery, such as a voltage developed across the battery, are detected. Based on the battery property and the battery status as detected, a current flowing in the motor of the power tool is controlled.11-22-2012
20120293095CONTROL UNIT OF ROTARY DEVICE - In a control unit that controls a control amount of a rotary device by controlling on and off states of switching elements of a power converting circuit, a relative rate predicting section temporally sets operation states of the power converting circuit and predicts a relative rate of a control amount according to each of the temporally set operation states relative to a command value thereof. Each of the operation states is indicated by a voltage vector defined by the on and off states of the switching elements. A determining section determines an operation state of the power converting circuit based on the relative rate predicted by the relative rate predicting section. An operating section operates the power converting circuit to the operation state determined by the determining section.11-22-2012
20080272718Power electronic circuit arrangement for a rotating field machine - A power electronic circuit arrangement includes functional blocks for controllable, bidirectional energy exchange between a rotating field machine with at least one phase winding and an external energy store with one positive terminal and one negative terminal. At least one functional block is designed as a functional block that is connection-compatible on the power side and includes at least one internal energy store, such that this functional block has at least one additional switching state, in which an output voltage (U11-06-2008
20080272717METHOD AND APPARATUS TO DETERMINE ROTATIONAL POSITION OF AN ELECTRICAL MACHINE - A control system and method to determine position of a rotor relative to a stator for a synchronous multipole electrical machine is presented, including one for application on a fuel/electric hybrid powertrain for a vehicle. The machine includes a stator, a rotor, and a rotor position sensing mechanism. The control system controls the electrical machine, in conjunction with an electrical storage device and an inverter, using algorithms and calibrations which derive a rotor position based upon a sensorless position sensing technique, and determine an offset from a sensed rotor position. Electrical output from the inverter to the machine is controlled based the offset, which is stored non-volatile memory. A rotor position is derived based upon a sensorless position sensing technique during initial machine operation after startup of the machine, and includes operation in a torque-generative mode and in an electrical energy-generative mode.11-06-2008
20090146588BOOSTER CONVERTER CIRCUIT FOR VEHICLES - An object of the invention is to limit a current flowing in a booster converter circuit for a vehicle within a predetermined range. In the booster converter circuit for a vehicle including a battery that outputs a DC voltage; a switching unit having a switching element to be controlled to ON or OFF; an inductive element unit being connected between the battery and the switching unit and including an inductive element; a switching control unit that controls the switching element, an output voltage measuring unit that measures an output voltage of the booster converter circuit for a vehicle is provided, and the duty ratio determining device obtains a control duty ratio with respect to the switching element on the basis of a measured output voltage value so that a value of a converter current flowing through a path from the battery to the switching unit falls within a predetermined range.06-11-2009
20080265809Field weakening control apparatus for permanent magnet motor and electric power steering using same - A motor control apparatus which controls an output voltage reference for an inverter driving a permanent magnet synchronous motor based on d-axis and q-axis current references, d-axis and q-axis current detected values, and a computed frequency value. When a torque reference specifying torque greater than maximum torque that the motor can output is input, a limit value for a phase angle that is a deviation between a rotation phase reference of control and a rotation phase value of the motor is varied depending on a quantity of the predetermined state.10-30-2008
20080265808Motor Drive Voltage-Boost Control - A drive system for a motor having a rotor and a phase winding (a, b, c) comprises; a drive circuit including switch means associated with the winding a, b, c for varying the current passing through the winding; rotor position sensing means arranged to sense the position of the rotor; control means arranged to provide drive signals to control the switch means; a power input for connection to a power supply at a nominal voltage; and boost means in electric communication with the power input and power output, and controllable to boost the nominal voltage to a higher voltage for application to the winding.10-30-2008
20100141185SYSTEM AND METHOD FOR MAINTAINING PERFORMANCE OF BATTERY-OPERATED TOOTHBRUSHES - The system periodically measures the battery voltage of the toothbrush and the current in a stator portion of the motor for the appliance. The amplitude of movement of the toothbrush workpiece is determined from the measured stator current. A circuit/control program changes the duty cycle or pulse width of the drive signal from the motor if the battery voltage drops below a first threshold value and a circuit or control program changes the drive frequency of the appliance if the amplitude of the workpiece movement falls below a first threshold value. A circuit/control program terminates the operation of the toothbrush if the voltage drops below a second threshold value or if the amplitude drops below a second threshold value, both of which are less than the respective first thresholds.06-10-2010
20130119898BATTERY SYSTEM, ELECTRIC VEHICLE, MOVING BODY, ELECTRIC POWER STORAGE DEVICE, POWER SUPPLY DEVICE AND BATTERY VOLTAGE DETECTION DEVICE - A voltage detection section 05-16-2013
20090140673ELECTRIC POWER STEERING SYSTEM - In a power supply apparatus 06-04-2009
20110221363COMBINED ELECTRIC DEVICE FOR POWERING AND CHARGING - The invention relates to a combined method and device for powering and charging, wherein said device comprises an AC motor (09-15-2011
20090001909AUTOMOTIVE POWER INVERTER WITH REDUCED CAPACITIVE COUPLING - An automotive power inverter is provided. The power inverter includes a chassis, a microelectronic die coupled to the chassis and having an integrated circuit formed thereon, and an insulating region between the chassis and the microelectronic die.01-01-2009
20100013420REVERSE DRIVE CONTROL FOR A MOTORCYCLE - A vehicle comprising a rotatable wheel (e.g., three rotatable wheels), a forward drive mechanism including a forward drive motor (e.g., an internal combustion engine), and a reverse drive mechanism. The reverse drive mechanism includes a reverse drive motor (e.g., an electric motor) adapted to move the chassis in the rearward direction, and a reverse drive control programmed to inhibit operation of the reverse drive mechanism when the forward drive motor is off. In one embodiment, the vehicle includes a battery for operating the reverse drive motor, and the reverse drive control is programmed to inhibit operation of the motor when a characteristic of the battery (e.g., an output voltage) falls below a threshold. The vehicle can further include a temperature sensor for the reverse drive motor. In this embodiment, the reverse drive control is programmed to inhibit operation of the reverse drive motor when the temperature of the motor exceeds a threshold.01-21-2010
20090295313Rechargeable power tool, control unit and recording medium - A rechargeable power tool includes a direct current motor, a switching circuit, at least one speed setting unit, a duty ratio setting unit, a drive unit, an operation amount detecting unit, an abnormality determining unit, and a determination threshold setting unit. The abnormality determining unit compares an operation amount detected by the operation amount detecting unit and a determination threshold set based on the operation amount to thereby determine whether or not an operation state of the rechargeable power tool is abnormal. The determination threshold setting unit sets the determination threshold in a continuous or stepwise manner in accordance with a rotation speed set by the speed setting unit.12-03-2009
20100259203ELECTRONICALLY COMMUTATED MOTOR - The invention relates to a method for operating an electronically commutated motor (10-14-2010
20130214705Method for Limiting a Switch-on Current in an Electrical System - The disclosure describes a method for limiting a switch-on current in an electrical system which is supplied with power by a battery. During a switch-on process, an electrical load is connected to the electrical system and precharged by means of a precharging resistor. A monitoring unit regularly records operating data of at least one variable which influences a temperature of the precharging resistor and estimates the temperature of the precharging resistor on the basis of said operating data. The disclosure also describes an apparatus and a battery which are designed to execute the method according to the disclosure.08-22-2013
20130214706Apparatus and Method for Inductive Power Transfer on an Electrified Roadway Using a Rotating Secondary Inductor - The invention described herein provides an energy transfer system via a tire based inductor system. By using the tire, the area inside the tire, the tire rim, or the wheel as the inductive pick-up for a powered roadway system the prior art problems are solved. Namely, since the tire/wheel is always in contact, or near contact with the road, the air gap is reduced to a minimum, and substantially fixed, distance. By mounting the secondary on the perimeter of a wheel, relative motion between the road and inductor is minimized In addition, the pick-up can be encased in the tire, eliminating the problem of road debris, snow and ice entirely. Also, some heating of the tire due to electrical losses may enhance traction and tread performance on snowy or wet roads. In all configurations, the vehicle's wheel suspension adjusts vertically adjusting for road imperfections and obstacles.08-22-2013
20100181946VOLTAGE STEP-UP/DOWN CONVERTER - A motor control apparatus includes a step-up/down converter and an inverter. The converter includes a coil, MOSFETs, capacitors and a control circuit. The control circuit turns on the MOSFET in the high potential side, while tuning off the MOSFET in the low potential side. After a predetermined time, the control circuit turns off the MOSFET in the high potential side and then turns on the MOSFET in the low potential side. It is checked whether the MOSFET, which is switched in the step-down operation, is normal or abnormal based on the voltages of the capacitors. The capacitors produce specific changes in the respective voltages in correspondence to the check result. Thus, the abnormality of the MOSFET can be determined based on the changes.07-22-2010
20110057586MONITORING BATTERY CELL VOLTAGE - An apparatus includes battery gauge circuitry implemented on an integrated circuit. The battery gauge circuitry includes a plurality of switches that individually open in response to a voltage reduction on a battery cell associated with a respective one of the switches. The battery gauge circuitry also includes a logic device that determines if at least one of the switches is open. The battery gauge circuitry also includes a register that stores data that indicates if at least one switch is open. The battery gauge circuitry also includes a controller that initiates halting power delivery to a load if at least one of the switches is open. The controller also identifies the open switch.03-10-2011
20090256502BATTERY MANAGEMENT SYSTEM FOR A CORDLESS TOOL - A hand-held, battery powered tool (e.g., nutrunner, drill) includes an output head operatively connected to a motor, a plurality of battery cells, an ON/OFF start switch, a resistance sensor that measures a resistance of the output head to movement, and a controller. When the start switch is ON and the resistance sensed by the resistance sensor does not exceed a predetermined shift resistance, the controller automatically connects the plurality of battery cells to each other and the motor in series. When the start switch is ON and the resistance sensed by the resistance sensor exceeds the predetermined shift resistance, the controller automatically connects the plurality of battery cells to each other in parallel and to the motor.10-15-2009
20090072770POWER INVERTER MODULE THERMAL MANAGEMENT - According to an example embodiment, a method is provided for limiting an operational temperature of a motor. The method includes generating a maximum allowable current I*03-19-2009
20080309262Multiple Phase Electric Motor and Drive - A multiple phase electric motor provided with multiple inverter power circuits is described herein. The capacity of the capacitor bank required for multiple phase motors operating from a DC power source is therefore decreased. This is done by forming groups of phases that are powered by a separate inverter power circuit. The inverter power circuits are connected to the same DC power source including a bank of capacitors and are so controlled as to be phase offset from one another to allow the use of a smaller capacity capacitor bank.12-18-2008
20090115358Hybrid vehicle and method of controlling hybrid vehicle - A hybrid vehicle includes a power generator that generates electric power using power from an internal combustion engine; a motor that outputs power for travel of the hybrid vehicle; a first inverter connected to an electric power storage device and the motor to drive the motor; a second inverter connected to the electric power storage device; and a large drive power determination portion that determines whether the hybrid vehicle is in a large-drive-power required state in which drive power equal to or larger than a predetermined value is required for the travel of the hybrid vehicle. When it is determined that the hybrid vehicle is not in the large-drive-force required state, the second inverter is connected to the power generator. When it is determined that the hybrid vehicle is in the large-drive-force required state, the second inverter is connected to the motor.05-07-2009
20110031907CONTROL APPARATUS FOR ELECTRIC ROTATING MACHINE - The control apparatus controls a controlled variable of the electric rotating machine by manipulating an output voltage of a power converter circuit including switching elements operated to connect positive and negative terminals of a DC power source to corresponding terminals of the electric rotating machine. The control apparatus includes a prediction section configured to predict the controlled variable for each of a plurality of cases where the power converter circuit is set in a corresponding one of a plurality of predetermined operating states, a feedforward control section configured to set a command value of the controlled variable in accordance with the voltage of the DC power source and the electrical angular velocity of the electric rotating machine, and a manipulation section configured to select one of the predetermined operating states depending on a result of evaluation by an evaluation function receiving the predicted controlled variable and the command value.02-10-2011
20090108780METHOD AND SYSTEM FOR CONTROLLING A POWER INVERTER IN ELECTRIC DRIVES - Methods and systems for controlling a power inverter in an electric drive system of an automobile are provided. The various embodiments control the power inverter by, responsive to a commanded torque of the electric motor being below a first torque level, controlling the power inverter to set a switching frequency of the power inverter at a first set frequency; and, responsive to the commanded torque of the electric motor being between the first torque level and a second torque level, controlling the power inverter to determine the switching frequency of the power inverter as a function of the commanded torque of the electric motor while maintaining the switching frequency above a dynamic frequency limit. The method reduces switching frequencies in the inverter at high commanded torques, while maintaining the switching frequencies above dynamic frequency limit that provides effective control over the motor.04-30-2009
20110127933CONTROL DEVICE FOR ELECTRIC MOTOR DRIVE DEVICE - A control device that controls an electric motor drive device is configured with a current control portion that determines a voltage command value, a voltage control portion that generates a switching control signal, and a current control period determining portion. The control device is also configured with a voltage control period determining portion that determines a voltage control period, and a control period setting portion. In the control device, the current control period determining portion determines, according to a target torque, the current control period as a value that increases continuously or stepwise as the target torque decreases. Furthermore, the voltage control period determining portion determines, according to a rotating speed, the voltage control period as a value that increases continuously or stepwise as the rotating speed decreases.06-02-2011
20110001442Electric bicycle drive system with regenerative charging - Methods and apparatus for reconfiguring a battery and/or an electric motor assembly for an electric bicycle drive system are provided. A battery having a plurality of battery cells in a first configuration adapted to provide a first battery voltage can be reconfigured into a second configuration adapted to provide a second battery voltage. The second battery voltage may be lower than the first battery voltage. The battery can be charged when in the second configuration. Similarly, an arrangement of two or more electric motors can be provided in a first configuration adapted to provide at least one of a first torque output during a driving action and a first regenerative voltage output during a braking action. The motors can be reconfigured into a second configuration adapted to provide at least one of a second torque output during the driving action and a second regenerative voltage output during the braking action.01-06-2011
20130147404DC-DC CONVERTER SYSTEM OF AN ELECTRIC VEHICLE AND CONTROL METHOD THEREOF - Disclosed is a DC/DC converter system that, after calculating required voltages of the first and second motors based on the magnetic flux and speeds of the first and second motors, the voltage supplied to inverters is controlled by a final voltage command determined as a larger value of the battery voltage and the final required voltage. In particular, the final required voltage is determined as a larger value of the required voltages of the first and second motors.06-13-2013
20110025236POWER CONVERSION EQUIPMENT - Power conversion equipment includes an electric power converting section that converts DC electric power to multiphase AC electric power and feeds the converted multiphase AC electric power to a multiphase AC motor. A first short-circuit section includes a first switch disposed between a first DC power supply and the electric power converting section. A second short-circuit section includes a second switch disposed between at least one of an electric power feeding section and the electric power input section in the first DC power supply, or between a multiphase AC output point of the electric power converting section and the multiphase AC motor. A switch control section controls the first switch and the second switch such that the first and second switches are prevented from being brought into the closed-state simultaneously.02-03-2011
20090066271METHOD AND SYSTEM FOR CONVERTING DC POWER TO AC POWER - Methods and systems for converting direct current (DC) power to alternating current (AC) power are provided. A first phase of the AC power is generated based on a first carrier signal. A second phase of the AC power is generated based on a second carrier signal.03-12-2009
20110115416APPARATUS FOR DRIVING MOTOR OF ELECTRIC VEHICLE - An apparatus for driving a motor of an electric vehicle is provided. The apparatus includes a capacitor supplied with power by a battery; an inverter configured to include a plurality of switching elements, convert direct current (DC) power stored in the capacitor into alternating current (AC) power in accordance with the switching of the switching elements and drive a motor with the AC power; and a capacitor protector provided between the battery and the capacitor and configured to consume initial power supplied by the battery at an early stage of the supply of power by the battery, the capacitor protector including a common resistor that consumes the DC power stored in the capacitor when the capacitor is discharged. Therefore, it is possible to guarantee the reliability of the apparatus.05-19-2011
20110115417PM MOTOR DRIVE POWER SUPPLY APPARATUS - The present invention provides a PM motor drive power supply apparatus which drives a three-phase permanent-magnet synchronous motor by utilizing a direct-current power source 05-19-2011
20110140642POWER CONVERSION DEVICE - Based on rotation information of a synchronous machine detected by a rotation information detector, a controller causes a converter to boost a charge voltage of a capacitor so as to be higher than an induced voltage generated by the synchronous machine at a time of shifting to a coasting operation, maintains the charge voltage during the coasting operation, and performs weak field control so that the induced voltage generated by the synchronous machine becomes lower than a DC voltage at the time of shifting from the coasting operation to a power running operation or to a regenerative operation.06-16-2011
20090033255CHARGING ENERGY SOURCES WITH A RECTIFIER USING DOUBLE-ENDED INVERTER SYSTEM - Systems and methods are provided for charging energy sources with a rectifier using a double-ended inverter system. An apparatus is provided for an electric drive system for a vehicle. The electric drive system comprises an electric motor configured to provide traction power to the vehicle. A first inverter is coupled to the electric motor and is configured to provide alternating current to the electric motor. A first energy source is coupled to the first inverter, wherein the first inverter is configured to provide power flow between the first energy source and the electric motor. A second inverter is coupled to the electric motor and is configured to provide alternating current to the electric motor. A rectifier is coupled to the second inverter and configured to produce a direct current output. The second inverter is configured to provide power from the rectifier to the electric motor.02-05-2009
20090033254DOUBLE ENDED INVERTER SYSTEM WITH A CROSS-LINKED ULTRACAPACITOR NETWORK - A double ended inverter system for an AC traction motor of a vehicle includes a fuel cell configured to provide a DC voltage, an impedance source inverter subsystem coupled to the fuel cell, a DC voltage source, and an inverter subsystem coupled to the DC voltage source. The impedance source inverter subsystem, which includes an ultracapacitor, is configured to drive the AC traction motor. The inverter subsystem is configured to drive the AC electric traction motor. The ultracapacitor is implemented in a crossed LC network coupled to the fuel cell.02-05-2009
20090033253ELECTRIC TRACTION SYSTEM FOR A VEHICLE HAVING A DUAL WINDING AC TRACTION MOTOR - An electric traction system for a vehicle having a high voltage battery and a low voltage battery is provided. The system includes an AC electric motor and a double ended inverter system coupled to the AC electric motor. The AC electric motor has a first set of windings and a second set of windings that occupy common stator slots, where the first set of windings and the second set of windings are electrically isolated from each other. The double ended inverter system drives the AC electric motor using energy obtained from the high voltage battery and energy obtained from the low voltage battery. The double ended inverter system utilizes a first inverter subsystem coupled between the first set of windings and the high voltage battery, and a second inverter subsystem coupled between the second set of windings and the low voltage battery.02-05-2009
20110068719BATTERY SYSTEM - A battery system manages a plurality of battery cells of an assembled battery. The battery system includes at least a plurality of battery cell management units which is connected to the battery cells and manages the connected battery cells. The battery cell management units are connected to each other. Each of the battery cell management units comprises at least an operation mode switching unit, a parameter-related data generating unit, a parameter data transmitting unit, a parameter data receiving unit, a minimum value specifying unit, a switching command data transmitting unit, and a switching command data receiving unit.03-24-2011
20110248653CONTROLLED POWER FADE FOR BATTERY POWERED DEVICES - A method is provided for operating a power tool having a motor powered by a battery. The method includes: delivering power from the battery to the motor in accordance with an operator input; detecting a condition of the power tool indicating a shutdown of the power is imminent; and fading the power delivered from the battery to the motor, in response to the detected condition, through the use of a controller residing in the power tool.10-13-2011
20100301784POWER CONVERSION CIRCUIT - In a power conversion circuit operating with high frequency, an off-voltage control circuit 12-02-2010
20120200241Control Device for Vehicle Electric Drive Motor and Vehicle With the Same - A controller for vector-controlled motor of vehicle judges whether a battery needs to be warmed up in accordance with an output of a battery temperature sensor, and when the battery needs to be warmed up, in situation (i) where the vehicle is stopped, sets a q-axis current value of the motor at zero, or when a brake is released from the situation (i), sets a q-axis current at a value corresponding to a drive torque for a vehicle creep operation, and sets a d-axis current at a value for battery warm-up. When the battery needs to be warmed up in situation (ii) where the vehicle is running, the controller sets a q-axis current at a value corresponding to a drive torque of vehicle running and sets a d-axis current at a value for the battery warm-up in relation to the q-axis current value.08-09-2012
20100141186ELECTRIC TOOL AND DEVICE SWITCH FOR AN ELECTRIC TOOL - The invention relates to a device switch for an electric tool, in particular a battery-operated electric tool. A power circuit for supplying power of a motor and an electronic circuit for monitoring the temperature, power and current is integrated into the device switch. The invention moreover relates to a method for monitoring an electric tool, in particular an electric tool with rechargeable battery operation.06-10-2010
20110254474Rotating Electric Machine and Electric Vehicle - A rotating electric machine includes a stator having a stator coil and a rotor provided rotatably around a specific rotation axis with respect to the stator. The rotor includes a plurality of magnets, a plurality of magnetically-assisted salient pole members provided between poles of any adjacent two magnets from among the plurality of magnets, and a magnetoresistance variation unit provided in the magnetically-assisted salient pole member along an axial direction of the rotation axis at a position offset in a circumferential direction of the rotation axis from a q-axis passing through a salient pole center of the magnetically-assisted salient pole member. The amount of offset of the magnetoresistance variation unit from the q-axis varies depending on positions of the magnetically-assisted salient pole members so that torque fluctuations cancel each other when power is applied.10-20-2011
20110163700METHODS AND SYSTEMS RELATED TO DESULFATION OF A BATTERY - Desulfation of a battery. At least some of the illustrative embodiments are methods of inducing ringing across terminals of a battery to reduce and/or reverse the build up sulfate crystals on the battery plates.07-07-2011
20110163701Battery Pack for Cordless Power Tools - A battery pack which includes a battery pack electronic control circuit adapted to control an attached power tool and/or an attached charger. The battery pack includes additional protection circuits, methodologies and devices to protect against fault conditions within the pack, as the pack is operatively attached to and providing power to the power tool, and/or as the pack is operatively attached to and being charged by the charger.07-07-2011
20110163699Battery And Ultracapacitor Device And Method of Use - A battery and ultracapacitor device for use in a vehicle includes a positive electrode, a first negative electrode, a second negative electrode, a first separator disposed between the positive electrode and the first and second negative electrodes, and a controller communicating with the positive electrode, the first negative electrode, and the second negative electrode. A first negative electrode has a first composition and communicates with the first positive electrode. The second negative electrode has a second composition and is adjacent to the first negative electrode and a second separator. The second negative electrode communicates with the positive electrode and the first negative electrode. The first negative electrode comprises a secondary battery negative electrode. The second negative electrode comprises an ultracapacitor negative electrode.07-07-2011
20080218104Power management for multi-module energy storage systems in electric, hybrid electric, and fuel cell vehicles - An electric energy storage system (EESS) for providing a power management solution for a multi-subsystem energy storage in electric, hybrid electric, and fuel cell vehicles. The EESS has a controller that determines when to draw power from each subsystem as needed by the vehicle.09-11-2008
20110187298FUEL CELL SYSTEM AND MOTOR DRIVING METHOD - A motor can be driven while reducing the power loss of the entire system where a plurality of devices that causes power losses exists. The system is provided with an inverter connected to a motor, a first converter that is connected between a fuel cell and the inverter and sets an output voltage of the fuel cell, a second converter that is connected between a power storage device and the inverter and sets an input voltage Vin of the inverter, and a controller that controls the first converter and the second converter. Under the operating condition (torque, number of revolutions) required for the motor, an input voltage of the inverter which minimizes a power loss of at least one of the motor, the first converter, the second converter and the inverter is determined, and the determined input voltage is output as a necessary voltage for the inverter.08-04-2011
20100019702CURRENT SENSING FOR A MULTI-PHASE DC/DC BOOST CONVERTER - Methods and apparatus are provided for sensing currents on a plurality of phases and determining current information therefrom. The multi-phase boost converter includes a single sensor coupled to all of the plurality of phases and a controller coupled to the sensor for determining the current information in response to currents on each of the plurality of phases sensed by the sensor. The sensing method utilizes the gate drive signals and the DC current sensor output to calculate the currents on each of the plurality of phases sensed by the sensor.01-28-2010
20110304287CONTROL CIRCUIT AND METHOD FOR MANIPULATING A POWER TOOL - The present application discloses a control circuit for a power tool and a method for manipulating the power tool. The control circuit has a detection circuit for battery packs, a calculating control circuit, a battery capacity indicating circuit for indicating the calculation result of the battery capacity, and a current measure and calculating circuit for measuring the current flowing through motors. The calculation result further includes the voltages consumed by the battery pack internally and the discharge loop. The method for manipulating the power tool includes pressing the switch to electrically connect the motor and the battery pack, measuring the parameters of the battery pack and allowing the motor to operate or not according the measured parameters. Further, after the motor is in operation, the battery capacity is calculated and the results are displayed.12-15-2011
20110050134Series electric engine power drive - The motor generator set is described where in the output from the motor driven generator is fed back to the input of the electric motor in series with the power from the battery, which energizes the motor. Diodes are provided in this unique circuitry between the output of the generator and the input of the motor between the output of the motor and input of the generator, and between the battery and the input of the electric motor to direct current into the electric motor.03-03-2011
20110316454ALTERNATING-CURRENT ELECTRIC MOTOR OF A COMBINED ELECTRIC DEVICE FOR POWERING AND CHARGING - The present invention relates to an alternating-current electric motor of a combined electric device for powering and charging, the said electric motor being formed by a stator connected to an electricity network of which the number of phases is lower than the number of phases of the said motor, the said charging current of the said network being injected via a connection point dividing each phase of the said stator connected to a phase of the said network into two half-windings, the said motor being characterized in that each half-winding of a phase comprises a plurality of coils wired together so as to reduce the magnetic linkage of each half-winding at the said connection point so that there exists an apparent non-zero inductance at the said connection point in charging mode of the said device.12-29-2011
20120043917Battery Connection System - A method of operating an electric vehicle including the steps of: (1) providing the electric vehicle (2) providing an electric load device on the electric vehicle (3) providing a first battery on the electric vehicle with a first state of charge (4) providing a second battery on the electric vehicle with a second state of charge lower than the first state of charge (5) determining an initial state of charge of the first battery (6) determining an initial state of charge of the second battery (7) connecting the first battery to the electric load device (8) measuring the current flow from the first battery (9) calculating an instantaneous state of charge of the first battery (10) comparing the instantaneous state of charge of the first battery with the initial state of charge of the second battery, and (11) when the instantaneous state of charge of the first battery reaches a predetermined percentage of the initial state of charge of the second battery, connecting the second battery in parallel with the first battery.02-23-2012
20120104980SWITCHED RELUCTANCE AND PM BRUSHLESS DC MOTOR DRIVE CONTROL FOR ELECTRIC VEHICLE APPLICATION - A method of operating an electrical machine having first and second phase windings. The method includes: (1) applying positive first current to the first phase winding while the first phase winding's back electromotive force (emf) is positive; (2) applying negative second current to the first phase winding while the first phase winding's back emf is negative; and (3) applying positive third current to the second phase winding while the second phase winding's back emf is positive. The first current is conducted through a circuit composed of a battery, the first phase winding, and a first switch. The second current is conducted through a circuit composed of a first capacitive storage element, the battery, the first phase winding, and a second switch, and the third current is conducted through a circuit composed of the battery, the second phase winding, and a third switch.05-03-2012
20110156620BATTERY PROTECTION SYSTEM AND METHOD THEREOF - A battery protection method is provided for preventing a main battery set from being damaged by a current from a load, and for lengthening the lifespan of the main battery set. The method includes the steps of: providing an auxiliary battery set; determining whether to recycle energy of the load, and performing a charging mode if affirmative; and transferring energy from the load to the auxiliary battery set when performing the charging mode. The method prevents the main battery set from being damaged due to charging at a high C rate, transfers possible damage due to the high current charging to the auxiliary battery set, lengthens the lifespan of the main battery set, and reduces the overall cost and difficulty of the maintenance of the main battery set by shifting the focus of the maintenance from the main battery set to the auxiliary battery set.06-30-2011
20090001910Control method, control circuit, and control program for power retractable mirror - A control method can stop motor operation reliably when a mirror rotator is mechanically locked at a driven end of the mirror rotator. The control method operates a motor 01-01-2009
20120013276ELECTROMAGNETIC MOTOR - An electromagnetic motor having a frame, and at least one disc rotatably mounted to the frame. At least one permanent magnet is mounted on the disc, and at least one electromagnet is mounted to the frame in magnetic proximity to the at least one permanent magnet. A battery is electrically coupled to the motor for powering the at least one electromagnet. A switch controls electrical power between the battery and the at least one electromagnet, and a sensing means is provided for controlling the switch to activate the at least one electromagnet with respect to the at least one permanent magnet to cause the at least one disc to rotate. Preferably, a generator is mechanically coupled to the motor and electrically coupled to the battery for generating electrical power to the battery, and a renewable energy source such as a photovoltaic cell is electrically coupled to the motor to supplement any net electrical loss.01-19-2012
20120112670VACUUM CLEANER AND METHOD FOR CONTROLLING AN ELECTRIC MOTOR - A vacuum cleaner and a method for controlling the motor power of a vacuum cleaner are disclosed. The vacuum cleaner comprises an electric motor and an electric power supply for providing electric power to the electric motor. Furthermore, a voltage measuring means for measuring a motor voltage over the electric motor and a current measuring means for measuring a motor current flowing through the electric motor are provided. The vacuum cleaner further comprises a control means for controlling, based on the measured voltage and the measured current, the electric power provided to the electric motor from the electric power supply towards a target motor power value.05-10-2012
20120025744BATTERY PACK AND ELETRICAL TRANSFER APPARATUS INCLUDING SAME - A battery pack includes: a first battery cell group including at least one high capacity battery cell; and a second battery cell group including at least one high output battery cell and being coupled in parallel to the first battery cell group, wherein the high output battery cell is configured to output a greater current than the high capacity battery cell, the high capacity battery cell is configured to store a greater amount of electric energy compared to the high output battery cell, and the battery pack is configured to operate in one of operational modes including: a high capacity mode for outputting electric energy stored in the first battery cell group; a high output mode for outputting electric energy stored in the second battery cell group; and a mutual charge mode for charging the first battery cell group or the second battery cell group.02-02-2012
20120153876Blower Apparatus having an Electric Drive Motor - The invention relates to a blower apparatus (06-21-2012
20120153879APPARATUS FOR ENERGY TRANSFER USING CONVERTER AND METHOD OF MANUFACTURING SAME - According to an aspect of the invention, a motor drive circuit includes a first energy storage device configured to supply electrical energy, a bi-directional DC-to-DC voltage converter coupled to the first energy storage device, a voltage inverter coupled to the bi-directional DC-to-DC voltage converter, and an input device configured to receive electrical energy from an external energy source. The motor drive circuit further includes a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter. The coupling system has a first configuration configured to transfer electrical energy to the first energy storage device via the bi-directional DC-to-DC voltage converter, and has a second configuration configured to transfer electrical energy from the first energy storage device to the voltage inverter via the bi-directional DC-to-DC voltage converter.06-21-2012
20120153878APPARATUS FOR ENERGY TRANSFER USING CONVERTER AND METHOD OF MANUFACTURING SAME - According to an aspect of the invention, a motor drive circuit includes a first energy storage device configured to supply electrical energy, a bi-directional DC-to-DC voltage converter coupled to the first energy storage device, a voltage inverter coupled to the bi-directional DC-to-DC voltage converter, and an input device configured to receive electrical energy from an external energy source. The motor drive circuit further includes a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter. The coupling system has a first configuration configured to transfer electrical energy to the first energy storage device via the bi-directional DC-to-DC voltage converter, and has a second configuration configured to transfer electrical energy from the first energy storage device to the voltage inverter via the bi-directional DC-to-DC voltage converter.06-21-2012
20120153877SYSTEM FOR CAUSING TEMPERATURE RISE IN BATTERY - A battery temperature rise causing system has a converting unit for converting voltage of electric power held in one of a rechargeable battery and a capacitor and applies the converted voltage to the other one, and a control unit controlling the converting unit to alternately perform first transfer of electric power from the battery to the capacitor and second transfer of electric power from the capacitor to the battery while changing the first transfer for the second transfer each time the battery voltage reaches a lower limit and changing the second transfer for the first transfer each time the battery voltage reaches an upper limit, and to increase temperature of the battery due to heat generated by electric current flowing through the battery during the electric power transfer.06-21-2012
20110012543ELECTRIC POWER CONVERTER - An electric power converter includes a DC to DC converter section adjusting DC power of a battery with at least two units in series, a DC circuit having at least two DC link capacitors in series between a positive and a negative line from the DC to DC converter section, an electric power converter section connected to the DC circuit to convert DC electric power to AC electric power for a motor, a bilateral switching circuit connecting an intermediate potential point between the capacitors and an AC output point in the electric power converter section, and a short-circuit between the intermediate potential point of the DC circuit and an intermediate potential point between the battery units. Normal operation of a load is ensured even when the battery, the capacitor in the DC circuit or the switching device in the electric power converter section becomes abnormal, while achieving high efficiency.01-20-2011
20120249020DRIVE CIRCUIT FOR SWITCHING ELEMENT - A drive circuit for a switching element includes a constant-current control unit and a restriction unit. The constant-current control unit performs a constant-current control for charging an open/close control terminal of a switching element to be driven which is a voltage-controlled switching element with electric charge for turning on the switching element. The restriction unit restricts, to a reference voltage, a voltage between the open/close control terminal and a first end of a pair of ends of a current flow path of the switching element for a predetermined period following a start of the constant-current control within a charging process period during which the open/close control terminal is charged with the electric charge such that the switching element is turned on.10-04-2012
20120249021INFORMATION TRANSMISSION APPARATUS - A transmission circuit transmits a header pulse signal which has signal length being equal to or more than twice as long as reference time, pulse period having predetermined ratio thereof to the signal length, and pulse stop period being successive and longer than the reference time via transmission path. The transmission circuit subsequently and successively transmits a plurality of data pulse signals which have signal length being the same as the reference time, pulse period having predetermined ratio thereof to the signal length associated with data, and pulse stop period being located before and after the pulse period via the transmission path. A reception circuit receives pulse signals via the transmission path, detects the header pulse signal based on the pulse stop period of the received pulse signal, and obtains a plurality of pieces of data based on the pulse period of pulse signals following the header pulse signal.10-04-2012
20120126728INTEGRATED ELECTRIC MACHINE AND SILICON CARBIDE POWER CONVERTER ASSEMBLY AND METHOD OF MAKING SAME - An electric drive system comprising an electric machine comprising a rotor and a stator, a power converter electrically coupled to the electric machine and configured to convert a DC link voltage to an AC output voltage to drive the electric machine, and a single cooling loop, wherein the electric machine and the power converter are integrated within the single cooling loop.05-24-2012
20120161677BATTERY MODULE, BATTERY SYSTEM AND ELECTRICALLY DRIVEN VEHICLE - A battery module includes a plurality of battery cells, a detection circuit, a communication unit, and a printed circuit board. The detection circuit and the communication circuit are mounted on the common printed circuit board. The detection circuit detects a voltage of each of the battery cells in the battery module, and feeds the detected voltage to the communication circuit. The communication circuit is connected to a communication circuit in another battery module or a battery ECU. Thus, the communication circuit in the battery module and the communication circuit in the other battery module or the battery ECU can communicate with each other.06-28-2012
20120212160DISCHARGE CONTROL DEVICE OF ELECTRIC POWER CONVERSION SYSTEM - In an electric power conversion system having a discharge control device capable of discharging a voltage charged in a capacitor to a voltage of not more than a predetermined voltage, a linear regulator decreases a voltage of the capacitor and outputs the decreased voltage to a drive unit at a bottom arm in a U phase. A flyback converter for discharging use inputs an output of the linear regulator, and outputs electric power to a drive unit at an upper arm in the U phase. When detecting that own vehicle collides with an obstacle, the discharge control device starts to execute discharge control of the capacitor by turning off a photo coupler and turning on the linear regulator.08-23-2012
20120212159CONTROLLER FOR ELECTRICAL POWER STEERING APPARATUS - The electrical power steering apparatus 08-23-2012
20120217906FAILURE INFORMATION TRANSMISSION APPARATUS - A failure information transmission apparatus includes a transmission circuit and a reception circuit. The transmission circuit transmits a plurality of pieces of failure information related to a plurality of failures as pulse signals different from one another via the same transmission path. The reception circuit receives the pulse signals transmitted by the transmission circuit via the same transmission path and identifies the failure information based on the pulse signal received. If the plurality of failures occurs at the same time, the transmission circuit transmits preferentially transmits failure information with higher priority of transmission.08-30-2012
20120133310RECONFIGURABLE BATTERY - A reconfigurable battery has at least one bank of statically joined series connected battery cells, each cell including a positive and a negative pole. The poles connect through switches to respective output connections. Activating a set of processor controlled switches reconfigures at least some of the battery cells into a configuration to provide a voltage across the output connections. The output battery voltage may vary intermediately between open circuit voltage and the maximum voltage produced by the series connected battery cells. An alternative configuration of switches divides groups of series connected battery cells into separate battery banks that permit other battery cell configurations. Duty cycle modulation of the switches allows intermediate control of output voltage with reduced switching transients. Reconfigurable battery cells used in combination with an electric motor permit selectable speed control and battery regeneration schemes matched to motor output.05-31-2012
20120133309BATTERY POWER SYSTEM - A battery power system, adapted for driving a motor system of a power unit with respect to at least one power mode signal and at least one motor control signal generated from the motor system, which comprises: a battery pack, an electrolytic capacitor, a boost converter, a first contactor, a first switch, an ultracapacitor, a first diode, a second contactor, a second switch, a current limiting element, a plurality of measuring elements, and an electrical energy controller; wherein the electrical energy controller is enabled to analyze the electrical power level of the ultracapacitor according the power mode signal, the motor control signal and the voltage/current signals generated from the plural measuring elements while using the result of the analysis to control the current directions and conductivity of the boost converter, the first contactor, the second contactor, the first switch and the second switch so as to achieve a variety of control modes accordingly.05-31-2012
20090058329Power Supply System and Vehicle - A maximum value selection unit (03-05-2009
20120169258DISCHARGE STATE INDICATOR - A circuit for displaying the state of a battery that is almost discharged features a battery, an inductive load, and a controllable switch connected in series. The circuit also includes a display element connected in series with the inductive load and the battery. The controllable switch is opened when a voltage of the battery is lower than a first threshold level and is only closed again when the voltage of the battery is greater than a second threshold level. The circuit may also include a control circuit having a comparator which compares the voltage of the battery with the first threshold level and the second threshold level and triggers the controllable switch accordingly.07-05-2012
20120313562BATTERY CONTROL DEVICE, BATTERY SYSTEM, ELECTRIC VEHICLE, CHARGE CONTROL DEVICE, BATTERY CHARGER, MOVABLE BODY, POWER SUPPLY SYSTEM, POWER STORAGE DEVICE, AND POWER SUPPLY DEVICE - A battery control device is connected to a plurality of battery cells. The battery control device includes a voltage value calculator, a communicator, and a voltage value updater. The voltage value calculator calculates, based on a current flowing through a plurality of battery cells, a voltage of each battery cell. If the battery control device is connected to a charge control device, the communicator receives information relating to a voltage of each battery cell, which has been detected by a voltage detector in the charge control device, from the charge control device. The voltage value updater updates the voltage calculated by the voltage value calculator based on the voltage information received by the communicator.12-13-2012
20120074877OVER-TEMPERATURE PROTECTION CIRCUIT FOR POWER DEVICES - An over-temperature protection circuit for a direct current (DC) electric tool includes a current detecting circuit electrically coupled to a battery pack, a power device control circuit electrically coupled to an electric motor of the DC electric tool and a power device for controlling the power state of the circuit. A computation control circuit controls the power supply of the motor according to the circuit current value detected by the current detecting circuit. When the electric motor is not in a speed control state, the allowable current passing through the over-temperature protection circuit of the DC electric tool cannot exceed a preset first current value. When the electric motor is in the speed control state, the allowable current passing through the over-temperature protection circuit of the DC electric tool cannot exceed a preset second current value less than the first current value.03-29-2012
20120313560HIGH-CURRENT BATTERY SYSTEM AND METHOD FOR CONTROLLING A HIGH-CURRENT BATTERY SYSTEM - The present invention relates to a high-current battery system in which a high operating current flows, in particular for vehicle drives. The high-current battery system has a battery system monitoring electronics unit and a plurality of battery modules, each module including at least one rechargeable battery cell and being electrically connected in series by means of an operating current line such that an operating current flows through the operating current line during operation. At least one of the battery modules is designed as a bypass battery module which comprises a bypass switch and a bypass line, which are designed and disposed such that the battery module is electrically bridged by the bypass line after the bypass switch is switched from a normal operating position into a bypass position, so that the operating current flows through the bypass line. For each bypass battery module, the battery system monitoring electronics unit incorporates a module monitoring unit which monitors the associated battery module and detects a fault state of the module. Upon detection of a fault state of a battery module by one of the module monitoring units, the battery system monitoring electronics unit measures the current flow in the operating current line and switches the bypass switch of the battery module in question from the normal operating position into the bypass position at a time at which the current flow in the operating current line is less than a predetermined limit value.12-13-2012
20120313561MOTOR DRIVE UNIT - A switching element is switched off after having been switched on for only a short time interval called a first predetermined time interval, and a determination is made, based on a mode of a change in a contact point potential (a regeneration voltage) between an electric motor and the switching element when the switching element as switched off, as to whether or not one of the electric motor and the switching element has failed. Next, the switching element is switched on for a time interval called a second predetermined time interval, which is longer than the first predetermined time interval, and a determination is made, based on the magnitude of the contact point potential at that time, as to which one of the electric motor and the switching element has failed. It is thus possible for a failure of the switching element and electric motor to be detected.12-13-2012
20120313559BATTERY MODULE, ELECTRONIC APPARATUS, ELECTRIC POWER STORAGE SYSTEM, ELECTRIC POWER SYSTEM, AND ELECTRIC VEHICLE - A battery module includes a plurality of battery supports each having a face orthogonal to the stacking direction, and a side face, the battery supports each containing a plurality of cells and being made of an insulating material, a coupling part that is located between the face of one battery support and the face of another adjacent battery support, and contracts in the stacking direction upon stacking the battery supports to bring the faces of the battery supports into intimate contact, a group of cells including the battery supports stacked with the coupling part being placed between the battery supports, a base plate, and first and second regulating plates placed facing each other in a standing position on the base plate, the first and second regulating plates sandwiching the group of cells arranged between the first and second regulating plates and stacked with the coupling part being contracted.12-13-2012
20100007293PROGRAMMABLE POWER-CONTROL CIRCUIT AND METHODS OF OPERATION - An electric-motor controller uses multiple semiconductor switches in parallel, arranged so as to improve turn-on and turn-off synchronization. A physical “sandwich” arrangement improves manufacturability of some embodiments. A system using the controller can recharge a battery pack from a charging source of a different voltage by using a field coil of the motor as an inductor in a step-up or step-down circuit. Controller software monitors parameters such as battery voltage, temperature and current to adjust system operation.01-14-2010
20120256568MULTI-PORT RECONFIGURABLE BATTERY - A multi-port reconfigurable battery has at least one bank of statically joined series connected battery cells, each including a positive and negative pole connected through switches to respective output connections on at least one port. Processor controlled switches reconfigure the cells to provide power for electrical loads on one or more ports and simultaneously provide charging on one or more other ports. An alternative configuration divides groups of series connected cells into separate battery banks that permit other configurations. Ports are configurable to share one electrically common connection with other ports providing a simplified configuration (multi-tap reconfigurable battery). Applications include selectable motor speed control and battery regeneration schemes matched to motor output, and single or multiphase AC power output at selectable frequencies for use as an Uninterruptible Power Supply. The battery is also described as a power source for a forced-air induction system (e.g. electric supercharger) for a combustion engine.10-11-2012
20120256569Battery Control Device and Motor Drive System - In a memory, the surface temperature and the internal resistance of an assembled battery detected under the condition where a difference between the surface and the internal temperature is within a predetermined value are stored, and an internal temperature diagnosis unit that diagnoses whether or not the internal temperature estimated by an internal temperature estimation unit is correct, detects the internal resistance with an internal resistance calculation unit when the internal temperature estimation unit estimates the internal temperature, searches for an internal resistance corresponding to the surface temperature equal to the estimated internal temperature value from among the stored internal resistances, and diagnoses the estimated internal temperature value based upon the result of comparison of a search result of the internal resistance and the internal resistance detected during internal temperature estimation.10-11-2012
20120229057ELECTRIC VEHICLE - An electric vehicle may include a main battery, a charging system electronic device, an electrically powered system-based electronic device, a first high-voltage electric wire; and a second high-voltage electric wire. The electrically powered system-based electronic device and the charging system electronic device may be sequentially disposed in parallel. The electric vehicle may further include a first junction relay capable of isolating the first high-voltage electric wire; and a second junction relay capable of isolating the second high-voltage electric wire. The first junction relay is disposed between the main battery and the charging system electronic device, and a first pre-charge relay which bypasses the first junction relay is disposed in parallel with the first junction relay, and the second junction relay is disposed between the charging system electronic device and the electrically powered system-based electronic device.09-13-2012
20120229055POWER CONVERTER AND POWER CONVERTER OF ROLLING STOCK - A power converter includes a first electric power conversion unit having an inverter for converting a first DC electric power to an AC electric power, an AC circuit connected to the first electric power conversion means;09-13-2012
20120235604INVERTER DEVICE OF ROTATING ELECTRICAL MACHINE, AND DRIVING METHOD FOR ROTATING ELECTRICAL MACHINE - An inverter device of a rotating electrical machine drives a multiphase rotating electrical machine having the variable number of rotations using a switching element provided for each phase. An example of the inverter device of the rotating electrical machine includes: a frequency setting unit for determining and setting a carrier frequency of a carrier signal for use in driving the switching element for each phase depending on the state of each phase of the rotating electrical machine for each specified electrical angle obtained by equally dividing a cycle of an electrical angle; and a signal generation unit for generating a drive signal for drive of the switching element of each phase using the carrier signal of the carrier frequency set for each phase by the frequency setting unit. The carrier frequency of each phase is an integral multiple of the phase voltage frequency at the specified electrical angle.09-20-2012
20120262096ELECTRIC VEHICLE AND OPERATING METHOD OF THE SAME - Disclosed herein is an electric vehicle and a driving method thereof. According to the present disclosure, it may be possible to drive an electric vehicle using a drive inverter and coils within a three-phase motor, and charge a battery using them as a charging device. According to the present disclosure, coils included in a motor control device and switching elements within an inverter may be used, and the use of the inductors and switching elements required for the charging device may be reduced.10-18-2012
20120319626BATTERY OPERATED ELECTRIC MOTOR IN A WORK APPARATUS - An electric motor includes an arrangement of windings provided for driving the rotor, with the windings being connected to an energy source to develop torque which drives the rotor. The electric circuits of corresponding ones of the a windings each have a potential point, the voltage (U12-20-2012
20110037420BATTERY STORAGE DEVICE SYSTEM, AND MOTOR DRIVING BODY AND MOVING BODY USING THE SYSTEM - The invention provides a high-efficiency battery storage device system, and a motor driving body and a moving body using the system. The battery storage device system comprises (1) a main battery storage device A having high energy density relative to an auxiliary battery storage device B, (2) the auxiliary battery storage device B having high output density relative to the main battery storage device A, (3) a warm-up means for warming up the main battery storage device A to a predetermined temperature or more, (4) a warm-up monitoring means for monitoring a need for warm-up with respect to the main battery storage device A, (5) an operation mode switching means for selecting an operation mode from a warm-up operation mode and a normal operation mode and performing the selected operation mode, and (6) an electricity supply system supplying an electric power to an outside of the battery storage device system.02-17-2011
20120268044High Efficiency All-Electric Vehicle Propulsion System - An all-electric vehicle propulsion system using a readily available high frequency AC Motor such as a 3-phase 400 Hz motor. A step-down gearbox increases torque and power thus decreasing the need for a high-power motor. Also, with the controllers of the invention, readily available, inexpensive batteries can be used as a primary source of energy. An efficient C&A-DC/DC step-up converter to power a high-efficiency motor driver can force the AC-motor windings circulate current in a resonance mode at around 220 volts. While 400 Hz and 220 volts are preferred, any voltage or frequency may be used, as well as any number of phases. Vehicle speed and torque can controlled by changing frequency and voltage applied to the motor usually using a variable resistor.10-25-2012
20100231145METHOD FOR CONTROLLING A POLYPHASE VOLTAGE INVERTER - A method for driving a power bridge (09-16-2010
20120091930POWER SUPPLY SYSTEM, ELECTRIC VEHICLE PROVIDED WITH SAME, AND CONTROL METHOD OF POWER SUPPLY SYSTEM - When it is determined by a determining portion (04-19-2012
20120091929DUTY RATIO CONTROL DEVICE, ELECTRIC POWER TOOL AND RECORDING MEDIUM - A duty ratio control device includes a duty ratio calculation unit and a parameter setting unit. The duty ratio calculation unit, when an acceleration manipulation is performed, calculates a control duty ratio per predetermined timing based on a value of at least one parameter so that a rotation speed of a motor mounted on an electric power tool reaches a target rotation speed corresponding to the acceleration manipulation. The control duty ratio is calculated to be larger as the value of the at least one parameter is larger. The parameter setting unit sets the value of the at least one parameter. The value of the at least one parameter set for a reacceleration manipulation is larger than the value of the at least one parameter set for an initial acceleration manipulation.04-19-2012
20100201293ROTARY ELECTRIC MACHINE CONTROL SYSTEM - A rotary electric machine control system includes a battery electric power calculation unit for calculating battery electric power that is supplied from the battery; a torque limitation unit for limiting an output torque of the rotary electric machine; and a battery electric power abrupt variation estimation unit for estimating that the battery electric power is in an abrupt variation state in which the battery electric power is varying abruptly on the basis of at least one of a variation rate of the battery electric power and a variation rate of a rotational speed of the rotary electric machine.08-12-2010
20120286705APPARATUS AND METHOD FOR CONTROLLING ROTARY ELECTRIC MACHINE - A control apparatus controlling rotary electric machine includes a conversion circuit converting a DC voltage into an AC voltage so as to rotate the rotary electric machine and a control unit. The conversion circuit includes a high-side switch, a low-side switch that connected to stator windings of the rotary electric machine. The control unit controls the conversion circuit such that both high-side/ low-side switches are controlled to be successively ON and OFF at every predetermined periods for converting the DC voltage into AC voltage. The control unit dynamically controls high-side and low-side neutral switches each connected to a neutral point of the stator windings so as to increase or decrease a voltage at the neutral point whereby current flowing through the rotary electric machine is adjusted. As a result, a torque of the rotary electric machine is optimized.11-15-2012
20120286706BATTERY MODULE, AND ELECTRIC VEHICLE, MOVABLE BODY, BATTERY SYSTEM, POWER STORAGE DEVICE, AND POWER SUPPLY DEVICE INCLUDING THE SAME - A plate-shaped portion of each of separators has a cross-sectional shape bent in a concavo-convex shape in a vertical direction. The plate-shaped portion of each of the separators has a flat cross-sectional shape. The plurality of separators are arranged parallel to one another to alternately line up. One surface of each of the battery cells abuts on the plate-shaped portion of the separator, and the other surface abuts on the plate-shaped portion of the separator. Thus, a spacing between the battery cells, which are adjacent to each other with the separator sandwiched therebetween, becomes equal to the thickness of the plate-shaped portion, and a spacing between the battery cells, which are adjacent to each other with the separator sandwiched therebetween, becomes equal to the thickness of the plate-shaped portion.11-15-2012
20120139456ELECTRIC OPERATING MACHINE - When a main switch (06-07-2012
20130015789ELECTRIC TOOLAANM Miyazaki; HiroshiAACI ShigaAACO JPAAGP Miyazaki; Hiroshi Shiga JPAANM Shimizu; HidenoriAACI ShigaAACO JPAAGP Shimizu; Hidenori Shiga JPAANM Kawai; AkiraAACI ShigaAACO JPAAGP Kawai; Akira Shiga JPAANM Okada; MasaakiAACI ShigaAACO JPAAGP Okada; Masaaki Shiga JP - An electric tool comprises a removable battery pack 01-17-2013
20130020970Control System and Control Method for Electric Bicycle - A system and methods for controlling an electric motor in an electric vehicle. The system includes a battery management system and a motor controller. The battery management system monitors output voltage of each individual cell unit in a battery pack with a plurality of cell units and generates a state signal and a count value according to the monitored output voltages. The motor controller receives the state signal and the count value from the battery management system and controls the output current to the electrical motor. The battery management system generates the state signal in a first state if none of the monitored output voltages is below a predefined voltage for longer than a predefined period. The battery management system increases the count value each time a monitored output voltage drops below the predefined voltage. The cell units in the battery pack are protected by the battery management system.01-24-2013
20120242259ELECTRIC OPERATING MACHINE - The power circuit comprises a voltage conversion part converting an input voltage entered in accordance with a voltage of a power source to generate an output voltage and outputting the generated output voltage to the motor and a current detection part outputting a first signal in accordance with a current flowing through a given part of the power circuit. The voltage conversion part lowers the voltage value of new output voltage being generated when the current detection part outputs the first signal.09-27-2012
20110273117Reciprocating Electric Tool - The invention provides a reciprocating electric tool (11-10-2011
20130093368ELECTRIC DEVICES - Generally described, the present disclosure is directed to examples of electric devices that include first and second stator assemblies located within a rotor assembly. The configuration of the electric device, including the configuration of the first and second stator assemblies, results in the electric device generating a stronger magnetic field and therefore outputting a higher torque when current is provided to the second stator assembly and generating a weaker magnetic field and therefore outputting a higher rotational speed when current is provided to the first stator assembly.04-18-2013
20130093367METHOD AND DEVICE FOR ACTUATING AN ELECTRIC MACHINE IN THE MOTOR STARTING MODE - The present invention relates to a method (04-18-2013
20130093366CONTROL DEVICE AND CONTROL METHOD FOR POWER CONVERTER - To provide an upper limit of a generated voltage or generated torque, to thereby prevent the occurrence of an overvoltage or excessive torque during power generation, a control selection section (04-18-2013
20130134909HUB POWER DEVICE OF A HYBRID VEHICLE - A hub power device of a hybrid vehicle, comprising a motor powered battery, an accelerator unit, a motor control unit, an annular stator, and an axle shaft which passes through the annular stator to be combined with a hub. An inner wall of the hub is fixed with an annular rotor which is movably sheathed on an outer rim of the annular stator. When the accelerator unit is activated, the motor control unit controls the motor powered battery to supply electricity to the annular stator and the annular rotor, thereby driving the hub to spin. If the accelerator unit is inactivated, the motor powered battery stops supplying electricity to the annular stator and the annular rotor, allowing the annular rotor to spin freely following the hub, thereby generating electric energy between the annular stator and the annular rotor and charging the motor powered battery to reduce fuel consumption.05-30-2013
20130141020SYSTEM AND METHOD FOR MAINTAINING PERFORMANCE OF BATTERY-OPERATED TOOTHBRUSHES - The system periodically measures the battery voltage of the toothbrush and the current in a stator portion of the motor for the appliance. The amplitude of movement of the toothbrush workpiece is determined from the measured stator current. A circuit/control program changes the duty cycle or pulse width of the drive signal from the motor if the battery voltage drops below a first threshold value and a circuit or control program changes the drive frequency of the appliance if the amplitude of the workpiece movement falls below a first threshold value. A circuit/control program terminates the operation of the toothbrush if the voltage drops below a second threshold value or if the amplitude drops below a second threshold value, both of which are less than the respective first thresholds.06-06-2013
20110215743BATTERY CHARGING CIRCUIT AND CHARGING METHOD - A charging circuit is provided that charges a battery for supplying power to a motor drive system that includes a three-phase motor and a three-phase inverter for controlling the three-phase motor. The three-phase inverter includes first to third sets of switching elements. Each set corresponds to one of the three phases. The charging circuit includes a single-phase output transformer, a rectifier circuit, a line, and a controller. The single-phase output transformer includes a secondary side output section having a first terminal and a second terminal. The rectifier circuit is connected in parallel with the three-phase inverter and the battery. The rectifier circuit is also connected to the first terminal of the secondary side output section. The line connects a connecting point between the first set of the switching elements in the three-phase inverter with the second terminal of the secondary side output section. The controller performs on-off control of the first to third sets of the switching elements. During charging of the battery, the controller maintains the first set of the switching elements in an OFF state, and performs the on-off control of at least one set of the second and third sets of the switching elements.09-08-2011
20120274246ELECTRIC DRIVE AND BATTERY CHARGING POWER ELECTRONIC SYSTEM - An electric drive that provides power from a DC battery to an AC motor and for charging the DC battery when power is being supplied through the motor windings such that no secondary on-board system for charging the battery or specialized charging station is required. A DC battery is in electronic communication with a three-phase inverter that converts DC power received from the battery into an alternating current when a switch is placed into a closed position. The three-phase inverter is in communication with a three-phase stator such that it supplies the stator with the converted AC power. Once power is received by the stator an air flux and electronic current are produced that interact to produce torque on a rotor creating mechanical energy. When the switch is placed in an open position, the three phase stator discontinues supplying almost all the power to the rotor but rather receives alternating current from an already available three-phase voltage network. The alternating current is transferred into the inverter where it is converted into a direct current that is supplied to the battery to recharge the battery. A control device is provided to control how much power is drawn from and supplied to the battery.11-01-2012
20120274245Power Tool and Battery Pack - A power tool is connectable to a battery pack including a secondary battery. The power tool includes a motor and a prohibiting unit. The motor is driven with an electrical power supplied from the secondary battery. The prohibiting unit prohibits the supply of the electrical power to the motor based on a drop amount of a voltage of the secondary battery.11-01-2012
20120274244ELECTRIC OPERATING MACHINE - An electric operating machine comprising a motor and a power circuit driving the motor by the electric power supplied from a battery. The power circuit comprises a voltage conversion part converting an input voltage entered in accordance with a voltage of said battery to generate an output voltage and outputting said generated output voltage to said motor. The power circuit is structured so that the voltage value of said output voltage of said voltage conversion part is changeable.11-01-2012
20100315024INVERTER DEVICE - An inverter device includes a filter circuit, an inverter circuit, an electric current detecting circuit, a voltage detecting circuit, a control circuit for outputting a drive signal so as to switch switching devices ON and OFF and an internal power supply. The control circuit includes a shutdown circuit for stopping outputting the drive signal from the control circuit to the switching devices when an electric current flowing through a motor is an overcurrent or a voltage across the inverter circuit is an overvoltage. The shutdown circuit also stops outputting the drive signal from the control circuit to the switching devices when the voltage outputted from the internal power supply is not stabilized. When electric power by residual charge in the capacitor is used after the inverter device is disconnected from a high-voltage battery, the control circuit generates the drive signal based on a triangular reference waveform and also based on three command values for keeping switching devices corresponding to one phase of three phases in either ON or OFF state and for switching ON and OFF the other switching devices corresponding to the remaining two phases.12-16-2010
20130154521Battery with Variable Output Voltage - A battery includes at least one battery module line and a control unit. The at least one battery module line has a plurality of battery modules mounted in series. Each battery module includes at least one battery cell and a coupling unit. The at least one battery cell is mounted between a first input and a second input of the coupling unit. The coupling unit is designed to switch the at least one battery cell between a first terminal of the battery module and a second terminal of the battery module, on a first control signal, and to connect the first terminal to the second terminal on a second control signal. The control unit is designed to transmit the first control signal to a first variable number of battery modules of the at least one battery module line.06-20-2013
20130181639MOTOR DRIVE SYSTEM - A first drive circuit of a motor drive apparatus drives a motor by converting electric power of a battery. A relay is connected in high potential line between the battery and an inverter. A diode is connected in parallel to the relay. The diode conducts a current in a regeneration direction, which is from a high potential side of the inverter to a high potential electrode of the battery, under a state that the relay is in the off-state. Thus, an inductive voltage, which is generated by the motor when a reverse input torque is applied from a load side, is led to the battery through the diode, and switching elements forming the inverter are protected from the inductive voltage.07-18-2013
20110309776SEMICONDUCTOR CIRCUIT DEVICE INCLUDING SWITCHING ELEMENT - A semiconductor circuit device includes a semiconductor circuit including a switching element, a temperature monitoring unit, and a control unit. The temperature monitoring unit detects or estimates a temperature of a component connected to an inside or an outside of the semiconductor circuit. Here, the temperature of the component changes in accordance with a frequency of a current flowing through the component, and the frequency of the current flowing through the component changes in accordance with a switching frequency of the switching element. The control unit adjusts the switching frequency of the switching element such that the temperature of the component is equal to a target temperature.12-22-2011
20130187574POWER STATE DIAGNOSIS METHOD AND APPARATUS07-25-2013
20130187575POWER SOURCE APPARATUS - The power source apparatus is provided with a shunt resistor connected in series with batteries, and a current computation circuit that detects the voltage induced by current flow through the shunt resistor to compute battery current. The shunt resistor is provided with a pair of current flow terminals at two separated points on a metal plate connected in series with the batteries via connecting leads, and a pair of voltage detection terminals on a side of the metal plate between the pair of current flow terminals. Further, the shunt resistor has interval adjustment structures to adjust the distance (L) between attachment points where the connecting leads attach to the pair of current flow terminals. The distance (L) between lead attachment points is adjusted with the interval adjustment structures to finely adjust the voltage induced at the voltage detection terminals due to current flow between the two attachment points.07-25-2013
20120019175SEALED BATTERY AND MANUFACTURING METHOD THEREOF, AND VEHICLE AND DEVICE HAVING THE SAME MOUNTED THEREON - The sealed battery has a battery container (01-26-2012
20120019174Drive System, Method for Operating a Drive System, and Use - A drive system and method for operating a drive system, including an electromotor, inverter, energy store,01-26-2012
20120019173METHOD AND ELECTRIC COMBINED DEVICE FOR POWERING AND CHARGING WITH COMPENSATION MEANS - The invention relates to a combined device and method for powering and charging, that comprises an AC motor (01-26-2012
20130193881RECHARGEABLE ELECTRIC TOOL AND METHOD FOR MANUFACTURING RECHARGEABLE ELECTRIC TOOL - The electric tool is powered by a secondary battery as a power source, and includes: an output section configured to be transmitted thereto a rotation of a motor directly or through a decelerator; a voltage measurement section that measures a battery voltage; a storage means that stores, as a reference voltage, a voltage value of the battery voltage measured preliminarily when a motor-lock is occurring; and a control means that controls a driving of the motor. The control means is configured to decide that the motor is being locked and then stop or decelerate the motor upon detecting that the battery voltage measured through the voltage measurement section is maintained lower than or equal to the reference voltage stored in the storage means for a predetermined period of time during the driving of the motor.08-01-2013
20130200824METHOD FOR CONTROLLING THE POWER SUPPLY OF AN ELECTRIC MOTOR - A method and electrical system for controlling the power supply of an electric motor, in particular the electric motor of a vehicle that can be electrically driven, includes a control device that controls the power supply of the electric motor by an energy store. The energy store comprises a plurality of modules that are exposed to stress due to repeated charging and/or discharging and undergo an aging process as a result of said stress. In order to decouple the service life of the energy store from the service life of a vehicle, for example, the control device controls the charging and/or discharging of at least two modules differently such that said modules exhibit a stress difference so as to selectively reduce the aging process of the module being exposed to less stress.08-08-2013
20120074878METHOD AND SYSTEM FOR PREVENTION OF MOTOR REVERSAL - A power tool includes a brushless DC motor housed inside a tool housing, an input unit, and a control unit. The motor includes a rotor, a stator, and at least one sensor positioned to sense a state of the rotational position of the rotor inside the stator. A control unit controls commutation of the motor through a series of power switches coupled to the power supply. The control unit receives a current sensor state from the sensor and a user-selected speed from the input unit and determines whether the motor has reversed direction using the user-selected speed and the current sensor state. The control unit disables commutation of the motor if the motor has reversed direction until a proper current sensor state is received from the sensor.03-29-2012
20120086369PROPULSION CONTROL APPARATUS FOR ELECTRIC MOTOR CAR - A propulsion control apparatus for an electric motor car includes: an inverter apparatus connected to a DC power supply; a motor connected to an output of the inverter apparatus; a converter apparatus connected to an input of the inverter apparatus; and a power storage apparatus connected to an output of the converter apparatus, is configured to charge/discharge a part of power running power or regenerative power of the motor to/from the power storage apparatus. The converter apparatus includes a converter control unit that generates, based on a regeneration state signal as a signal indicating a suppression state of the regenerative power or regenerative torque or regenerative current equivalent to the regenerative power, a charging current command value, generates a charging and discharging current command value of the converter apparatus based on the charging current command value, and performs control.04-12-2012
20120086368LITHIUM-ION BATTERY CONTROLLING APPARATUS AND ELECTRIC VEHICLE - A lithium-ion battery controlling apparatus includes a controller. The controller is configured to raise an upper-limit voltage in response to capacity degradation of a lithium-ion battery which is configured to supply power to a load and receive power from the load.04-12-2012

Patent applications in class BATTERY-FED MOTOR SYSTEMS