Class / Patent application number | Description | Number of patent applications / Date published |
318722000 | Having electronic power conversion circuit | 36 |
20080284369 | Power converters - The present invention is directed to a power converter that can be used to interface a motor | 11-20-2008 |
20090027000 | LINEARITY FOR FIELD WEAKENING IN AN INTERIOR PERMANENT MAGNET MACHINE - Systems and methods are disclosed to provide torque linearity in the field-weakening region for an IPM machine. The systems and methods adjust the q-axis and the d-axis components of the stator current commands of the IPM machine using a flux weakening and a torque linearity control loop respectively. Thereby, torque linearity is maintained during the field weakening region of operation of the IPM machine. | 01-29-2009 |
20090058350 | JUNCTION TEMPERATURE REDUCTION FOR THREE PHASE INVERTERS MODULES - Provided is a motor controller and method of controlling a motor with an improved maximum junction temperature rating. In accordance with one aspect of the present invention, a motor is controlled by varying a common mode voltage duty ratio for a plurality of solid state switching devices in a power inverter, generating drive signals for the solid state switching devices based at least in part upon the common mode voltage duty ratio, and changing states of the solid state switching devices based upon the drive signals. | 03-05-2009 |
20090230913 | DC BUS DISCHARGE IN AN ELECTRIC MOTOR SYSTEM - Methods and apparatus are provided for improved discharge of a DC bus which provides power to an inverter. An electric motor system provided with the improved discharge method for discharge of the DC bus includes an electric motor, the inverter which provides electric control for the permanent magnet electric motor, the direct current (DC) bus which provides power to the inverter, and a processor. The processor generates operational control signals and provides such operational control signals to the inverter. In response to detecting a predetermined discharge signal, the processor generates operational control signals for generating a ripple current in motor windings of the electric motor to dissipate energy from the DC bus through a passive load, the passive load including the motor windings of the electric motor. | 09-17-2009 |
20090309535 | Motor control apparatus and motor control method - A first duty ratio of a drive command signal is computed by comparing a level of the drive command signal with a first threshold value at a motor controller of a blower motor apparatus. A second duty ratio of the drive command signal is computed by comparing the level of the drive command signal with a second threshold value at the motor controller. A control signal is generated based on the first duty ratio and the second duty ratio in the motor controller and is used to drive a blower motor of the blower motor apparatus. | 12-17-2009 |
20100026231 | SINGLE-PHASE AC SYNCHRONOUS MOTOR - An inexpensive, productivity-enhanced single-phase AC synchronous motor in which stabilized synchronous pull-in can be carried out by suppressing generation of counter torque during a starting operation. Starting operation is performed while the energizing range of motor current is suppressed such that the energizing direction of motor current waveform lagging in a phase behind the output waveform from a detection sensor ( | 02-04-2010 |
20100085005 | ELECTRIC MOTOR - A multi-phase electric motor comprises a stator comprising a plurality of wire coils surrounding a non-magnetizable core; a rotor with permanent magnets embedded therein, the rotor being disposed adjacent to the stator, the rotor being mounted on a rotatable drive shaft; a power source; a position sensor operably connected to the rotor; and a control circuit operably connected to the power source, the position sensor, and the wire coils, for controlling distribution of electrical energy to the wire coils. In this motor the control mechanism transfers electrical charge from a first coil to a second coil. | 04-08-2010 |
20100109596 | POWER SUPPLY APPLIANCE OF A TRANSPORT SYSTEM - The invention relates to a power supply appliance ( | 05-06-2010 |
20100188038 | ELECTRIC COMPRESSOR CONTROL DEVICE - An electric compressor control device includes: an inverter for electric compressor motor; a communication microcontroller arranged in a low-voltage region for transmission of an instruction signal via a high-speed communication bus; and a control microcontroller arranged in a high-voltage region and connected to the communication microcontroller via an insulation element for transmitting the instruction signal from the communication microcomputer as an inverter control signal to the inverter. The power voltage of the communication microcomputer is supplied from a low-voltage power source. The voltage from the low-voltage power source is transformed via a transformer and supplied as a power voltage of the control microcontroller. Thus, it is possible to use the existing insulation element at an insulation boundary between the low-voltage region and the high-voltage region so as to surely supply a predetermined power voltage to the microcontroller for controlling the inverter, thereby improving the communication reliability of the entire control device. | 07-29-2010 |
20110101906 | SYNCHRONOUS ELECTRIC MOTOR SYSTEM - The present invention aims to provide a synchronous motor drive system that is capable of suppressing ripples in current while reducing switching loss. The system includes three-phase inverters | 05-05-2011 |
20110163708 | MOTOR DRIVE APPARATUS AND ELECTRIC POWER STEERING APPARATUS USING THE SAME - A motor drive apparatus drives a motor by a first motor drive part and a second motor drive part. The first motor drive part includes a first inverter for supplying current to a first winding set. The second motor drive part includes a second inverter for supplying current to a second winding set. A control unit starts to supply currents to the first winding set and the second winding set at the same time after waiting for completion of all failure detection processing with respect to each of the first motor drive part and the second motor drive part. | 07-07-2011 |
20120086381 | BRUSHLESS SYNCHRONOUS MACHINE UTILIZING THIRD HARMONIC EXCITATION - A brushless, synchronous machine is provided. A brushless, synchronous motor includes a rotor, a stator extending around at least a portion of the rotor and separated from the rotor by an air gap, a first stator winding, a second stator winding, a third stator winding, a drive circuit, a first rotor winding, a second rotor winding, and a diode bridge. The first stator winding, the second stator winding, and the third stator winding are mounted to the stator to generate square waves. The drive circuit is configured to provide a current to the first stator winding, the second stator winding, and the third stator winding, wherein the current includes an alternating current (AC) component and a direct current (DC) component. The first rotor winding is mounted to the rotor to form a plurality of third harmonic coils. The second rotor winding is mounted to the rotor. The generated square waves induce a voltage in the first rotor winding that is applied to the second rotor winding to create a brushless, synchronous motor. The diode bridge is mounted to the rotor to rectify the voltage induced in the first rotor winding and to apply the resulting DC voltage to the second rotor winding. | 04-12-2012 |
20120104988 | HIGH POWER DENSITY SRMs - A power converter having a first switch and a first unidirectional current device that conducts current unidirectionally. The first switch and first unidirectional current device are interconnected such that when interconnected with a dc voltage supply, battery, and first phase winding of an electrical machine: (1) a first operational state exists in which a conductive state of the first switch causes the dc voltage supply to conduct current through the first switch and first phase winding, so as to store energy within the first phase winding and (2) a second operational state exists in which a non-conductive state of the first switch causes the first phase winding to discharge its stored energy by conducting current through the first unidirectional current device and battery, so as to store energy in the battery. | 05-03-2012 |
20120187893 | ELECTRIC MOTOR SYSTEM - An electric motor system including: a rotor ( | 07-26-2012 |
20120235622 | SYSTEMS AND METHODS FOR MONITORING CURRENT IN AN ELECTRIC MOTOR - Systems and methods are provided for monitoring current in an electric motor. An electrical system includes a (DC) interface, an electric motor, an inverter module coupled between the DC interface and the electric motor, a first current sensor between a first phase leg of the inverter module and a first phase of the electric motor to measure a first current flowing through the first phase of the electric motor, a second current sensor between the first phase leg and the DC interface to measure a second current flowing through the first phase leg, and a control module coupled to the first current sensor and the second current sensor. The control module is configured to initiate remedial action based at least in part on a difference between the first current measured by the first current sensor and the second current measured by the second current sensor. | 09-20-2012 |
20120249043 | COMMON MODE HYSTERESIS FOR PULSE-WIDTH MODULATION DRIVES - In an aspect, in general, a method for pulse width modulation control of a multiple phase drive includes identifying a set of at least one phase from the plurality of phases for the drive as eligible for clamping to one of a plurality of extreme power supply voltages, including excluding from the set of eligible phases those phases with intermediate control signal levels and excluding phases according to a proximity criterion on the control signal levels. A phase is selected from the set of eligible phases. A first offset signal is determined as a difference between a control signal level for the selected phase and an extreme control signal level associated with one of the plurality of extreme power supply voltages. A modified control signal is determined for each of the phases for the drive, by forming a combination of the first offset signal and a control signal level for each phase to determine the modified control signal for each phase. | 10-04-2012 |
20120249044 | INVERTER FOR DRIVING AN ELECTRIC MOTOR COMPRISING AN INTEGRATED REGULATOR - A driving inverter for a multi-phase electric motor includes an alternating current (AC) generator, at least one AC sensor, a power supply line, a current sensor, an input, and a controller. The AC delivers current to a terminal block that is connectable to the phases of the electric motor. The at least one AC sensor is arranged on a certain phase or certain phases powering the electric motor. The current sensor is arranged on the power supply line and senses a current thereon. The input receives information that includes a torque demand setpoint and at least one limit current value of a power source. The controller drives phase currents of the electric motor according to the torque demand setpoint and by keeping the current of the power supply line at an acceptable value according to the at least one limit current value of the power source. With the arrangement of the driving inverter, a maximum current can always be imposed on the power source with no risk of degrading it. | 10-04-2012 |
20120286717 | POWER CONVERSION APPARATUS PROVIDED WITH SUBSTRATE HAVING INSULATING AREA - A power conversion apparatus includes: a high-voltage circuit; a low-voltage circuit operating with an operating voltage lower than that of the high-voltage circuit; and a substrate. The substrate includes an edge section, portions corresponding to the low-voltage circuit and the high-voltage circuit formed thereon and a voltage conversion circuit converting a voltage range of the high-voltage to be capable of operating by the low-voltage circuit. The substrate is provided with an insulating area in a periphery of the high-voltage circuit, and the voltage conversion circuit being provided with an insulating area in a periphery thereof. The insulating area provided in the periphery of the voltage conversion circuit shares an area with at least either of the insulating area provided in the periphery of the high-voltage circuit and the edge section of the substrate. | 11-15-2012 |
20120293106 | METHOD FOR IMPROVING EFFICIENCY IN A MULTIPHASE MOTOR, AND MOTOR FOR IMPLEMENTING SUCH A METHOD - An electric motor ( | 11-22-2012 |
20130002186 | POWER CONVERTER - Provided is a power converter that is capable of ensuring a conduction current without expanding the configuration of a DC voltage conversion circuit such as a DC chopper. Power can be supplied from both a DC chopper and a voltage source rectifier converting AC power into DC power, to a voltage source inverter. The voltage source rectifier has an upper arm part and a lower arm part having switching elements. The voltage source rectifier converts AC power obtained from an alternator into DC power, performs a DC chopper operation using the upper and lower arms thereof and a winding wire of the alternator, and supplies power of a DC power source to the voltage source inverter. | 01-03-2013 |
20130063069 | APPARATUS AND METHOD OF DRIVING MOTOR WITH INITIAL COMPENSATION - There are provided an apparatus and a method for driving a motor with initial compensation. The apparatus for driving a motor includes a current detecting part detecting a voltage of a driving current flowing in the motor through an inverter supplying the driving current to the motor; a peak value detecting part detecting a peak value of the voltage detected by the current detecting part; an A/D converting part converting the voltage from the peak value detecting part into a digital signal; and a driving controlling part driving the motor for a predetermined initial driving period to compensate for an offset in the driving current based on the digital signal from the A/D converting part. | 03-14-2013 |
20130147417 | SYSTEM AND METHOD FOR CONTROLLING MOTOR OF ELECTRIC VEHICLE - Disclosed are a system and a method for controlling a motor of an electric vehicle. In particular, an output voltage from a battery used to provide power to a motor of an electric vehicle, a speed and a torque of the motor are used to generate a magnetic flux based current control map. A current control command is then generated using the magnetic flux based current control map. | 06-13-2013 |
20130147418 | Electric Motor - A multi-phase electric motor comprises a stator comprising a plurality of wire coils surrounding a non-magnetizable core; a rotor with permanent magnets embedded therein, the rotor being disposed adjacent to the stator, the rotor being mounted on a rotatable drive shaft; a power source; a position sensor operably connected to the rotor; and a control circuit operably connected to the power source, the position sensor, and the wire coils, for controlling distribution of electrical energy to the wire coils. In this motor the control mechanism transfers electrical charge from a first coil to a second coil. | 06-13-2013 |
20130147419 | LEAKAGE CURRENT REDUCING APPARATUS - In a system supplying power from an AC power supply to a three-phase motor via a converter and an inverter, a leakage current reducing apparatus is connected to a connection line between the AC power supply and the converter. A common mode transformer detects, as common mode voltage, common mode current flowing from the AC power supply to the connection line. The common mode voltage is inputted to a voltage amplifier via a filter apparatus. Output voltage obtained by voltage amplification passes through a capacitor and then is applied as an AC component to a neutral point of capacitors connected in a Y-connection fashion, so as to have the same phase as that of the common mode voltage. Thus, current having the same phase as that of the common mode current is supplied via the capacitors to the converter through the connection line, thereby reducing the common mode current. | 06-13-2013 |
20130278200 | SYSTEM FOR CONTROLLING CONTROLLED VARIABLE OF ROTARY MACHINE - In a system for controlling a controlled variable of a rotary machine having plural-phase input terminals of the rotary machine in which plural-phase AC power is applied from an AC power applying module to the input terminals, a command-voltage setting module sets, based on a request value for the controlled variable, plural-phase AC command voltages for the plural-phase AC power as a feedforward manipulated variable. A current obtaining module obtains plural-phase AC currents flowing in the respective plural-phase input terminals of the rotary machine. An amplitude correcting module corrects the amplitude of at least one of the plural-phase AC command voltages based on the magnitudes of the plural-phase AC currents. | 10-24-2013 |
20130307461 | METHOD FOR OPERATING A POWER CONVERTER, AND POWER CONVERTER CONTROL UNIT - A method for operating a power converter having at least one power converter half-bridge, in which a controllable switching element and a freewheeling diode connected parallel thereto and in the blocking direction are provided respectively between a first direct voltage terminal and an alternating voltage terminal as well as between the alternating voltage terminal and a second direct voltage terminal. The switching elements of the at least one half-bridge are controlled in alternating fashion and in each case interrupted by controlling pauses. The duration of the controlling pauses is set on the basis of a determined voltage drop at at least one of the freewheeling diodes. | 11-21-2013 |
20140028239 | Control System And Method - Embodiments of the present invention relate to an a method, apparatus and computer program product for controlling the operation of a drive unit comprising a plurality of switching modules arranged to receive a DC electricity supply and generate an AC electricity supply for driving a load from the received DC electricity supply, the AC electricity supply being generated by the switching of the plurality of switching modules between a conducting state and a non-conducting state. The method comprises receiving one or more characteristics associated with each of the switching modules, comparing, for each switching module of the plurality of switching modules, a characteristic of the switching module with an equivalent characteristic associated with one or more other switching modules of the plurality of switching modules, and controlling a time period during which one or more of the plurality of switching modules are in the conducting state in accordance with a result of the comparison. | 01-30-2014 |
20140117920 | MOTOR DRIVING DEVICE AND METHOD - There are provided a motor driving device and method. The motor driving device includes: an operation controlling unit generating a pulse width modulation (PWM) signal for controlling an operation of a motor; a driving controlling unit generating a short pulse signal using the PWM signal transferred from the operation controlling unit; and a power supplying unit supplying power to the motor using the short pulse signal, wherein the driving controlling unit controls the PWM signal depending on a control signal provided from the outside to generate the short pulse signal. | 05-01-2014 |
20140232318 | POWER CONVERSION CONTROL DEVICE, POWER CONVERSION CONTROL METHOD, ELECTRIC MOTOR, AND VEHICLE DRIVING SYSTEM - A power conversion control device includes a modulation-wave generating unit generating a modulation wave based on output voltage phase angle command and modulation factor, a carrier-wave generating unit that, in a case of non-overmodulation state, generates a triangular wave or saw-tooth wave as the carrier wave, and, in a case of overmodulation state, generates, as the carrier wave, a signal fixed to −1 in a first section that is a predetermined range centering on timing corresponding to a peak position of the modulation wave, generates, as the carrier wave, a signal fixed to +1 in a second section obtained by shifting the first section by a half cycle of the modulation wave, and generates, as the carrier wave, a triangular wave or saw-tooth wave in remaining third section, and a comparing unit that compares the carrier wave and the modulation wave and generates a switching signal. | 08-21-2014 |
20150077034 | PERMANENT MAGNET-TYPE ROTARY ELECTRIC MACHINE AND VEHICLE DRIVE SYSTEM - A rotor core includes magnet insertion holes embedding permanent magnets and arranged in a substantially U-shape, facing an outer circumferential surface of a rotor, and includes hollow portions formed at both side surface portions in a direction orthogonal to a magnetization direction of the permanent magnets embedded in the magnet insertion holes. A permanent magnet group for each pole having the plurality of permanent magnets includes vent holes passing through the rotor core in a direction of a rotating shaft, between one of the magnet insertion holes in which the permanent magnets are embedded and adjacent one of the magnet insertion holes or between the one of the magnet insertion holes and outer circumferential portions of the rotor core. The vent holes are arranged at positions to form the substantially U-shape together with the magnet insertion holes. | 03-19-2015 |
20150108938 | ENGINE CONTROL FOR A SYNCHRONOUS MOTOR - The invention relates to an engine control for a synchronous motor having a number of N stator coils set off in regard to each other, which are arranged around a rotor of the synchronous motor, wherein there may be impressed upon the stator coils by the engine control a coil voltage and wherein there is formed a coil current having a direct current component in a co-ordinate system rotating proportionally with the number of revolutions performed by the synchronous motor as well as a cross current component, wherein the cross current component effects a tangential force activating the rotor in the direction of rotation and wherein the direct current component effects a force acting perpendicularly to the rotor surface on the rotor, wherein the engine control has a direct current generator for generating a direct current component periodically alternating in the rotating co-ordinate system, in order to neutralise oscillations of the synchronous motor activated by the engine control by means of the force generated perpendicularly to the rotor surface, wherein the direct current generator is formed for evaluating at least one angle information and an operating cross current. | 04-23-2015 |
20150123592 | MOTOR CONTROLLER - A motor controller is configured to control a driving of an AC motor. The motor controller includes a voltage calculation part, a voltage limit value generation part, and a d-axis current adjustment part. The voltage calculation part is configured to calculate a voltage instruction value. The voltage limit value generation part is configured to generate a first voltage limit value at which a power conversion efficiency becomes substantially the maximum corresponding to a drive characteristic of the motor. The d-axis current adjustment part is configured to adjust a d-axis current on the basis of a deviation between the first voltage limit value and the voltage instruction value. | 05-07-2015 |
20150130391 | MOTOR DRIVE CONTROLLER AND MOTOR DRIVE CONTROL METHOD, AND MOTOR SYSTEM USING THE SAME - A motor drive controller may include: a current detecting unit detecting current values corresponding to a plurality of phases of a motor using a plurality of resistor elements; a correcting unit correcting an error in the detected current values caused by an error in the plurality of resistor elements; and a controlling unit controlling driving of the motor using an output of the correcting unit. | 05-14-2015 |
20150130392 | POWER SOURCE CONTROL APPARATUS FOR ROTATING ELECTRICAL MACHINE - A power source control apparatus for a rotating electrical machine includes a TRC optimum voltage output portion ( | 05-14-2015 |
20150372632 | ELECTRIC VEHICLE - An electric vehicle includes an electric motor, a transmission, a drive unit, a converter, and an electronic control unit. The transmission is provided in a power transmission path between a rotary shaft of the electric motor and drive wheels of the electric vehicle. The drive unit is configured to drive the electric motor. The converter is configured to regulate a voltage supplied to the drive unit. The electronic control unit is configured to control the converter, and determine the voltage regulated by the converter, based on a first quantity of state associated with torque of an output shaft of the transmission, and a second quantity of state associated with a rotational speed of the output shaft. | 12-24-2015 |
20160197570 | HIGH SPEED RATIO PERMANENT MAGNET MOTOR | 07-07-2016 |