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7151354 Magnetic noise reduction method for AC rotary electric machine, and motor control apparatus and AC rotary electric machine apparatus using the same  
The invention provides techniques for reducing or altering the magnetic noise of an AC rotary electric machine. A magnetic noise reducing harmonic current of order n, whose frequency is n times...
7148650 Maximum power point motor control  
A method and apparatus are implemented in software to control motor speed as a function of available power in a DC source-inverter-AC motor system, i.e. to perform maximum power tracking of motor...
7148649 Hybrid-electric vehicle having a matched reactance machine  
A hybrid-electric vehicle including a matched reactance machine power generation system (MRMPGS). The MRMPGS comprises a permanent magnet rotor type machine having a selected back electromotive...
7138773 Multiple inverters for motors  
A non-highway vehicle including an engine, a DC power source driven by the engine and providing DC power via a DC bus, a traction motor, a circuit for connection to the DC bus for providing power...
7133602 Power supply apparatus, motor drive control method using the same and motor vehicle having the same mounted thereon  
A power supply apparatus driving and controlling motor generators (MG1, MG2) includes a battery (10) generating an input voltage (Vb), a converter (110) converting the input voltage into a motor...
7122992 Inverter system for driving induction motor  
An inverter system for driving an induction motor is disclosed. The inverter system for driving an induction motor comprises: a rectifying circuit for rectifying a three-phase AC voltage and...
7119513 Control system and controlling method for motor drive four wheel drive vehicle  
A control system for controlling a vehicle which has an engine for driving at least one of wheels thereof and a motor for driving at least one of the rest of the wheels thereof. The control system...
7119508 Drive control device for direct current motor, rotation drive system for direct current motor and semiconductor integrated circuit for driving coil  
A dc motor drive system with a PWM control system permits a high-accuracy rotation drive control while detecting the currents flowing into the coils without using shunt resistors. The system...
7119530 Motor phase current measurement using a single DC bus shunt sensor  
A method and system for obtaining motor current measurements from a DC bus current of an inverter that drives a pulse width modulated electric machine is disclosed. The method may include sensing...
7112936 Apparatus and method for controlling brushless DC motor  
An apparatus and method for controlling a brushless DC motor, which minimizes a torque ripple thereof, and includes a power converting unit to convert alternating current (AC) power to polyphase...
7112941 System and method for estimating motor temperature for motor overuse protection  
To protect against overuse of a motor, such as may be used to control seat position in an automotive vehicle, an estimated temperature of the motor is determined based on an ambient temperature, a...
7112931 Motor control device and motor control method  
An inverter supply voltage generator comprises an inverter supply voltage computing unit 10, a voltage converter 11 and a battery 12. The inverter supply voltage generator varies inverter supply...
7113414 Inverter control device for driving a motor and an air conditioner  
An inverter control device for driving a motor with small size, light weight and low cost is provided. The inverter control device includes a first motor voltage command corrector that corrects a...
7109681 Parallel inverter motor drive with improved waveform and reduced filter requirements  
An improved motor controller for driving polyphase alternating current dynamoelectric machines from a direct current power source that employs two inverter bridges controlled with a state vector...
7106023 Motor driving apparatus  
The present invention is directed to the provision of a servomotor driving apparatus that feeds energy stored in a power storage part connected with a DC link that connects a rectifier circuit...
7106025 Cancellation of dead time effects for reducing common mode voltages  
Methods and apparatus for canceling dead time effects in the form of common mode voltages produced by a three-phase power conversion device in a rectifier/inverter variable frequency drive (VFD)...
7106018 Method of balancing the rotation of a motor  
A method of balancing the rotation of a motor is provided. Whether or not the motor is in a balanced rotation is determined by detecting whether the variation of a power-factor angle is less than...
7102325 Method for determining rotor flux vector of AC electrical machine  
A method for determining the rotor flux vector of an electrical machine, the method comprising the steps of controlling the electrical machine with an inverter, forming an equation for the...
7102323 High power density/limited DC link voltage synchronous motor drive  
A method and an apparatus optimize performance of a motor drive system. The method according to one embodiment comprises: selecting a property for a rated operation point; selecting inverter...
7102319 Synchronous motor and a rotation control method thereof, as well as, an inverter for use of the synchronous motor  
A rotation control method of a synchronous motor, the motor comprising: a stator having AC windings thereround; and a rotor, being mounted within said stator, rotatably, wherein on an each...
7102320 Half-bridge control circuit  
A circuit is configured to detect an output state of a first half-bridge circuit and to generate a first signal and a second signal based on the output state to reproduce the output state at an...
7100717 Integrated electric power take-off system  
The preferred embodiments of the present invention utilize the internal combustion engine of a hybrid vehicle, coupled with an energy storage device and series of inverters to provide electrical...
7102327 Motor current reconstruction via DC bus current measurement  
A technique for reconstructing phase currents based on measurements of a DC bus current. Non-observable regions of DC bus current samples to reconstruct phase currents are reduced in size by using...
7102322 Motor controller  
A microcomputer includes an actual DUTY value detection section that detects an actual DUTY value γx by measuring the ratio of time in which an output voltage of each phase becomes a power supply...
7095208 Inverter controller for driving motor and air conditioner using inverter controller  
A reactor having a predetermined small capacity is connected to a rectifier, and a capacitor having a predetermined small capacity is connected between DC bus lines of the inverter, so that a...
7091690 Power conversion device  
A power conversion device is constituted by: a power converter that receives AC power and uses this to drive an AC motor; a control section for controlling an inverter section of the power...
7088073 Inverter drive system  
Systems and methods are provided for dynamically changing configurations of multi-inverter drive systems. By changing configurations during operation, a multi-inverter system of the present...
7088069 Load monitoring method for motor-driven injection molding machine  
Load of each motor-driven drive section of an injection molding machine is monitored in order to obtain an average load level of the drive section for each molding cycle. A cycle extending time or...
7084590 Booster and motor controller  
A voltage sensor (101) is connected to output terminals (P, N) of a booster. The voltage sensor (101) detects a boosted voltage, and outputs the detected voltage to a first drive controller (102)....
7081728 Apparatus for controlling heat generation and recovery in an induction motor  
An induction motor system comprising an induction motor, equipped with a heat recovery and water pumping apparatus and an apparatus for controlling the electrical efficiency and resulting heat...
7081734 Ride-through method and system for HVACandR chillers  
A method of providing ride-through capability in a chiller/refrigeration system employs a variable speed drive with an active converter stage, a DC link stage and an inverter stage for providing...
7075265 High phase order electrical rotating machine with distributed windings  
A rotating induction machine, containing five or more different phases, having windings distributed according to a sinc function with a cutoff frequency allowing low-order spatial harmonics but...
7071639 Electric motor control apparatus  
An electric motor control apparatus suppressing power loss caused by driving an electric motor acting as a motor with a generated output of an electric motor acting as a generator. The electric...
7071651 Position-of-magnetic-pole detecting device and method  
A high-frequency voltage whose amplitude is small is applied as a d-phase command voltage, and an excitation phase is changed to a predetermined degree at predetermined intervals, whereby a motor...
7064514 Motor drive system for AC motors  
A motor drive system without any portion for directly detecting the rotor position, rotation speed and motor phase currents, capable of realizing a high-performance variable speed drive even at...
7064515 Power converter  
In a power converter, an overvoltage suppression function of low cost and high reliability is provided. The power converter has a power conversion circuit, when driving a motor, for converting...
7061134 Method and system for improved thermal management of a voltage source inverter operating at low output frequency utilizing a zero vector modulation technique  
The present invention includes a method for thermal management in a voltage source inverter. The method includes sensing a low output frequency condition, determining a zero vector modulation...
7062369 Method and device for determination of a wheel brake parameter  
A method and a device for determining a characteristic value of a wheel brake are described. The characteristic value here is the brake characteristic value, which representing the relationship...
7053587 Apparatus for controlling three-phase AC motor on two-phase modulation technique  
An apparatus is provided to control a three-phase AC motor and comprises an inverter and a controller. The inverter powers the motor in response to a three-phase PWM command. The control circuit...
7049787 Converter circuit with short-circuit current protection  
A converter circuit with short-circuit current protection having a DC voltage circuit (1) is proposed, which DC voltage circuit (1) is formed by a DC voltage circuit subsystem (2.1), the DC...
7043377 Power-saving effect display device in an inverter device  
A power-saving effect displaying unit includes a power-consumption computing unit that calculates power consumption based on a voltage obtained by an output-voltage computing unit and a current...
7042178 Motor driving apparatus  
A motor driving apparatus including a regeneration control function and a power storage device for accumulating a regenerative current and for supplying an inverter section with electric power...
7042193 Control apparatus for rotating machine  
In a control apparatus for a rotating machine, an integration unit integrates a primary angular frequency based on an angular velocity command and computes phase, a power converting unit applies...
7042191 Current detection unit of inverter  
A current detection unit of an inverter outputs currents to a load, such as a motor includes a device for measuring a DC current flowing in the inverter. The current detection unit also includes a...
7042175 Apparatus and method for controlling drive of plural actuators  
An apparatus for controlling drive of a plurality of actuators is provided. The apparatus comprises a plurality of drive circuits respectively driving the actuators and respectively mounted on a...
7038405 Control of parallel operation of frequency converters or inverters  
A method and a system for controlling parallel-connected frequency converters or inverter units feeding an alternating-current motor (MOTOR1) provided with parallel windings or separate parallel...
7034478 Digital spindle control architecture  
A three-phase spindle motor has three terminals each driven with pulse width modulated signals. Rotation of the motor is controlled by iteratively measuring an electrical period of the motor,...
7030589 Driving systems of AC motor  
An AC motor control apparatus that is applicable to commonly used PM motors and capable of detecting the magnetic pole position with simple algorithm. The AC motor control apparatus comprises an...
7023166 Method for torque control of an induction motor using a voltage controller  
A method of controlling the torque of a multiphase induction motor includes the step of energizing the stator windings of the motor from a power converter using thyristors, inserted between a...
7023152 Driving control device for actuator  
A driving control device for an actuator comprises a driving device to drive an actuator having an electric motor (30) and a driving control device (50) to control the rotation of the electric...