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6819077 Method and apparatus for reducing sampling related errors in a modulating waveform generator used with a PWM controller  
A method and apparatus for use with a controller that samples a command frequency and provides modulating waveforms to a PWM inverter as a function of the sampled command frequency, the inverter...
6815925 Systems and methods for electric motor control  
Systems and methods for controlling and/or calculating the torque for a field oriented induction motor operating at a given stator frequency. The systems and methods include calculating the torque...
6777901 Gear motor with inverter suitable for reducing size and cost  
In a gear motor with an inverter, the inverter comprises a communication circuit for communicating with a controller to control the speed of the motor under the control of the controller and a CPU...
6777906 Method of controlling induction motor  
A control device for an induction motor controlling torque generation of the induction motor with high precision includes a rotation speed detector which detects the rotation speed of the...
6777907 Current ripple reduction by harmonic current regulation  
A method and apparatus for regulating a harmonic current component of an inverter fed motor drive system comprises measuring a phase current of the motor, substantially eliminating the fundamental...
6774591 Motor/generator  
A motor/generator comprises a stator (2) having plural coils (C1-C14), and plural rotors (3, 4) disposed coaxially with the above-mentioned stator and driven by a compound current. The phase...
6771040 Control apparatus and control method of on-vehicle dynamo-electric machine  
A control apparatus and a control method of an on-vehicle dynamo-electric machine 1 are provided for efficiently controlling functions as a starter-motor and as a charging generator. In case that...
6763622 Amplitude detection method and apparatus for high frequency impedance tracking sensorless algorithm  
A control system for an electric motor including an inverter for providing power to the electric motor, a controller for controlling the inverter, a first motor speed control block in the...
6762581 Control system of electric motor  
A control system of an electric motor powered by a battery comprises an inverter circuit that inverts a direct current fed from the battery to an alternating current fed to the electric motor; and...
6756763 Sensorless induction motor control  
A method for controlling an induction motor using an equivalent circuit model, the equivalent circuit having a real component and an imaginary component, is disclosed. The method instead of...
6753670 Universal energy regulating controller circuit  
A power controller for applying power to an induction motor or similar AC load has a variable drive circuit for staring and switching a portion of the AC input line power. In one mode, the input...
6750633 Electrical circuit for generating a three-phase alternating current  
An electrical circuit for producing a three-phase AC current from a low-power generator (10 kW to 5 MW) and for feeding the current into a power grid has a forward mode where energy flows from the...
6751105 Method for controlling pwm pulse  
For an interval in which an Op-vector and a b-vector are successively output among intervals of output voltage vectors of each phase within a PWM cycle, the output times of each vector are divided...
6750629 Inverter control apparatus and motor driving system  
A motor driving system for driving an induction motor with a rotation frequency detector. The induction motor drives a load, and the rotation frequency detector detects a rotation frequency of the...
6741062 Circuit configuration for supplying an electric motor  
A circuit configuration supplies an electric motor with a stator and a rotor. The stator has a large number of electromagnets, arranged in particular in the form of a ring, and the rotor has a...
6735284 System for controlling motor and method for the same  
The present invention relates to a system and a method for controlling a motor. A rotation/fixed coordinates converter converts a reference magnetic flux voltage and a reference torque voltage of...
6724169 Controller for power device and drive controller for motor  
A controller for controlling a power device in response to an input signal includes a first signal generator for generating a first signal in response to the input signal; a level shifter for...
6710564 Methods and apparatus for controlling brushless motors  
A method or apparatus for controlling a brushless motor having an inverter. The inverter comprises a first and a second plurality of switching elements at a first and second phase sides,...
6710568 Motor drive device  
A motor drive device of the invention has means for producing a pulse signal having a fixed amplitude by comparing a drive signal that is a sinusoidal signal synchronous with the rotation of a...
6710573 Method of controlling pulsed AC power  
PWM AC power is supplied to an induction motor or other AC load. The frequency and magnitude of the waveforms is controlled by detecting the peak voltage or width of the reverse EMF pulses at the...
6707401 Calculation processing device of resolver signal  
In a calculation processing device of a resolver signal, a processing speed of the resolver signal is increased, and a noise-proof characteristic thereof and also reliability thereof are improved,...
6708134 Method to estimate motor speed for stabilized motor control  
A method to estimate motor speed for extended stabilized rotational control of an induction motor at all speeds including slow speeds. The speed estimator supplies real-time time motor control...
6700347 Speed varying device  
This invention is to provide a variable speed apparatus capable of equalizing a moving distance at the time of deceleration from deceleration start to deceleration completion in the case that a...
6693405 Electrical steering system  
An electrical steering system for a vehicle includes an electrically supplied steering motor arrangement which is connected with an inverter arrangement, whose output voltage is influenced by a...
6690593 Power inverter designed to minimize switching loss  
A power inverter for a polyphase load such as an AC motor is provided which is designed to minimize an on-off switching loss of transistors installed in the inverter. The inverter works to...
6686719 Electric golf car with low-speed regenerative braking  
A control system for an electric vehicle, such as a golf car, that includes a plurality of power MOSFETs. The vehicle includes a shunt wound motor including an armature coil and a field coil. One...
6686718 Control loop and method for variable speed drive ride-through capability improvement  
A variable speed drive (VSD) having a rectifier, an inverter, an inverter modulator, an inverter controller, and a control loop, for controlling a motor load, wherein the control loop reduces an...
6683437 Current controlled motor amplifier system  
Aspects of a current controlled motor amplifier system are provided. These aspects include a current source motor amplifier comprising current source means on each leg of a top half of the H...
6683435 Electrical machine drive method and system  
An electrical machine drive system (100) includes a DC power source (102), an inverter (104) and a three-phase electrical machine (106). In response to a fault condition, power switches (122, 124)...
6680599 System for limitation of the output current from a speed controller  
This invention relates to a system for limitation of the output current from a speed controller for three-phase asynchronous electric motors, comprising a PWM type converter in which the...
6676400 Control unit of a motor for an injection molding machine  
First and second three-phase inverters having self-diagnosing circuits are connected to three-phase windings of a three-phase double-winding type motor, respectively, and first and second servo...
6674258 Motor driver and motor drive method  
A motor driver having output circuits each including upper and lower side switching elements connected in series. The motor driver includes: a current detection resistance connected in series with...
6670785 Electrical machine drive system and method  
An electrical machine drive system is simulated with a circuit simulator to model normal operation, fault modes and control strategies for electric motor based vehicles. The electrical machine...
6667597 Method of extending the operating speed range of a rotor flux based MRAS speed observer in a three phase AC induction motor  
A method of AC induction motor speed control employing a rotor flux based MRAS (Model Reference Adaptive System) speed observer. Rotor flux-based MRAS speed observers develop two independent rotor...
6661190 Controller and associated drive assembly controlling a brushless direct current motor  
A controller for controlling a BLDC motor controller includes a drive assembly, and a processing element. The processing element is in electrical communication with the drive assembly and the BLDC...
6653812 Space vector modulation methods and structures for electric-motor control  
Space vector modulation methods and structures are provided that reduce feedback errors which degrade motor control performance. In particular, the rotation of a reference voltage vector Vref is...
6646412 Method and system for controlling torque in a powertrain that includes an induction motor  
A method and system for estimating slip gain for use in the control of torque in a multi-phase induction machine. The slip gain estimate is based on a transient response of the induction machine...
6646394 Control device for plurality of rotating electrical machines  
A control device for a rotating electrical machine system having a plurality of rotating electrical machines is provided with a single current control circuit and a controller. The controller sets...
6646411 Control method of compressor motor and inverter equipped with the same method  
A control device for a compressor motor and an inverter according to the present invention monitors the amplitude of a phase current of a three-phase DC motor. As the amplitude of the phase...
6636013 Method of rapidly starting an asynchronous motor  
In order to accelerate an asynchronous motor with a squirrel-cage rotor even under load extremely quickly, and in particular within the time of an electromagnetic rotor time constant, in order to...
6633151 Electric vehicle drive system  
An electric drive system is provided to generate varying amounts of output torque supplied to a driven member over a wide range of constant revolutions per minute speeds to reduce power...
6633149 Method for digital control of a universal motor, in particular for electrical household appliances  
The invention concerns a method for digital control of a universal motor, in particular for electrical household appliance, comprising steps which consist on: measuring said engine (21) rotation...
6626002 Controller for PWM/PAM motor, air conditioner, and method of motor control  
In a motor driving unit controlled by switching to/from PWM control from/to PAM control so that the maximum limit of motor speed can be increased and, at the same time, the unit can be operated at...
6628893 DC motor rotation control apparatus  
A direct current motor rotation control apparatus, a method and device for controlling a rotational speed of a direct current motor, and an apparatus having the direct current motor rotation...
6624601 Control device for plurality of rotating electrical machines  
A control device for a plurality of rotating electrical machines has a single current control device with an inverter, gate driver, and a motor controller, which supplies a control current to each...
6617821 Method and apparatus for compensating for device dynamics by adjusting inverter carrier frequency  
A method and apparatus for reducing parasitic distortion in terminal voltages connected to a PWM inverter, the method comprising the steps of receiving each of a command operating frequency and a...
6617820 Auxiliary power conversion by phase-controlled rectification  
A method of generating low voltage auxiliary power forms for electric or hybrid vehicle use by tapping power from the traction motor primary winding with a secondary winding and rectifier.
6617819 Method of controlling preheating power and mechanism for providing preheating  
The present invention relates to a motor and especially to a technique for maintaining constant power consumption in preheating a compressor motor in an air conditioner. An object thereof is to...
6614991 Inverter-fed three-phase motor for household appliance, especially for the direct drive of washing machines  
An inverter-fed three-phase electrical motor (1) for a household appliance is grounded through a protective conductor (8), with the motor being particularly provided for the direct drive of...
6611124 Control apparatus of induction motor  
An induction motor control apparatus includes a first constant correction unit for correcting primary resistance based on quantity obtained by multiplying quantity of a voltage command from a...