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7348758 Audible noise reduction for single current shunt platform  
A method and system for reducing audible motor noise in a system for reconstructing motor phase current from a DC bus current comprising current pulses on a DC bus in a PWM inverter motor drive...
7342380 System and method for adjustable carrier waveform generator  
A system and method for controlling an inverter of a motor control unit includes a controller having a user interface configured to allow user selection of a waveform increment value or a waveform...
7339345 Power converter topologies for better traction drive packaging  
At least three alternative stiff current supply power converter topologies provide fixed current to a respective electric load such as a motor, or a non-inductive electric load using either a...
7336052 Device for powering a variable speed drive  
Variable speed drive comprising a main rectifier module (10) including thyristors (K1, K2, K3) to power a main continuous bus (15) from an external power network (5), an inverter module (30)...
7332882 Motor drive device that combined charge controller  
A voltage detector is connected to a connection terminal connected to one phase of an AC output of an inverter through a diode. A removable charge power supply is connected to said connection...
7332888 Driving apparatus for a motor  
A motor driving apparatus includes: a current instruction calculator, for calculating a current instruction value based on a deviation between a speed instruction value and an estimated speed...
7330010 Method for operating a rotating electrical machine and apparatus for carrying out the method  
A method is specified for operating a rotating electrical machine (1), which machine (1) has at least two sets of stator windings (A, B), in each case one associated converter unit (2) being...
7330011 Motor driving apparatus  
A motor driving apparatus includes an inverter circuit for converting an output of a rectifier circuit connected to a single-phase AC power supply into a driving voltage, and outputting the...
7327105 Mesh connected electrical rotating machine with span changing  
An electrical rotating apparatus is provided that has variable impedance. This is achieved by connecting one of the polyphase components of the apparatus in a mesh connection. The spanning value,...
7327118 Electric machine and method of operating the electric machine  
A method of and apparatus for controlling an electric machine. The method can include using a controller to detect whether power is present at a first node of the controller, detect whether power...
7327113 Electric starter generator system employing bidirectional buck-boost power converters, and methods therefor  
A bidirectional buck-boost power converter 13 including a pair of inverter modules 14, 15 disposed at an output of a machine, and an inductor Lo connected between the pair of inverter modules 14,...
7317295 Electric motor driving system, electric four-wheel drive vehicle, and hybrid vehicle  
An electric four-wheel drive vehicle includes: an internal combustion engine; a generator for outputting DC electrical power; an inverter for converting DC electrical power, output from the...
7313005 PWM circuit control method  
In the PWM circuit of the present invention, a PWM counter counts clock signals. A reference value setting register sets a comparative reference value for determining a duty ratio of a PWM signal....
7307399 Systems for managing electrical power  
Certain exemplary embodiments comprise a system comprising a plurality of Active Front End units adapted to be electrically coupled to a direct current (DC) bus. Each of the plurality of Active...
7307400 Inverter operation with over-modulation  
A variable frequency drive including a plurality of power cells that are configured as three phases of series-connected cells to deliver power to a load. The drive is operated to increase the...
7304451 Motor control apparatus and method for generating modulation wave instruction of PWM inverter of the same motor control apparatus  
A motor control apparatus capable of expanding a voltage output and a modulating wave signal generating method for a PWM inverter apparatus of the motor control apparatus, which is controlled by a...
7301736 Method and device for shutting down a drive with a matrix converter during a power outage  
A method and a device for shutting down a drive during a power outage are disclosed. The method and device include a matrix converter, several commutation capacitors on the power line side, a...
7301301 Electric car control apparatus  
In an electric car control apparatus for driving an induction motor, detection accuracy of a DC voltage is improved. A DC power supply device is provided which has a maximum potential terminal A,...
7279865 Method and apparatus for monitoring motor status using induced motor voltage  
A motor drive unit includes a controller, a voltage inverter, and a speed estimator. The controller is operable to generate at least one command signal for controlling a motor associated with the...
7279855 Electric drive device for vehicle and hybrid engine/motor-type four wheel drive device  
A vehicle electric drive system and a hybrid engine-motor type vehicle drive system realizing simplification and miniaturization of electric parts and, moreover, reduction in cost while...
7271566 Method and system for managing the voltage on the DC bus of a speed controller for an AC motor  
A method and system for managing the voltage of a DC bus of a speed controller for an AC electric motor linked to a current distribution network. The method includes comparing a value of the...
7272302 PSC motor system for use in HVAC applications with field adjustment and fail-safe capabilities  
A field-adjustable motor control system includes a motor, an inverter coupled to provide energization to the motor, a controller coupled to the inverter, and a field adjustment circuit that...
7268515 Three-in-one AC servo drive  
A three-in-one AC servo drive includes a main console, a control module, a power module and a plurality of servo motors. A single drive can be connected to a plurality of motors. The power module...
7253577 Independent safety processor for disabling the operation of high power devices  
A drive for delivering a high-power signal to a load includes a power circuit and a drive circuit. The power circuit is operable to provide a high power signal to the load in response to a control...
7250733 Circuit arrangement and method for controlling a brushless, permanently excited direct current motor  
The invention relates to a circuit arrangement for self-commuting control of a brushless, permanently excited direct current motor. Said circuit arrangement determines the commutation interval by...
7250794 Voltage source converter  
A voltage source converter with a line-side diode rectifier, a load-side inverter with an electronic circuit, a power supply for the electronic circuit, and a slim DC link with a DC link capacitor...
7250740 Method and apparatus for generating pulse-width modulated waveform  
In a method of generating pulse-width modulated waveform, the cycle of a carrier wave for the waveform is determined together with a first dead time value and a second dead time value both of...
7242163 System and method for clamp current regulation in field-weakening operation of permanent magnet (PM) machines  
A device to regulate current produced by a permanent magnet machine responsive to a plurality of phase current signals. The motor produces torque for application on a shaft. A processing and drive...
7243006 Predictive control system and method  
A control system and method selects a switch configuration for a power circuit having N binary switches, based in part on a finite state machine. The control system includes an embedded simulator,...
7235948 Forklift and method for controlling induction motor applied to the same  
A forklift having a cargo apparatus, the responsiveness of which to the operation by a user is improved. The forklift has: a DSP which generates a frequency instruction f* in response to the...
7233125 System and method for controlling an induction motor  
A system controls an induction motor driven by a power inverter circuit. An operational amplifier circuit is operatively connected to the power inverter circuit and operative therewith for sensing...
7233124 Motor drive inverter control apparatus  
A motor drive inverter control apparatus includes a rectifier circuit for rectifying an AC power supply, an inverter circuit driven by an output from the rectifier circuit, a motor driven by an...
7230403 System and method for elimination of DC offset feedback in AC drives  
A DC offset compensation system and method significantly reduce a DC offset voltage in the voltage feedback loop of an AC motor drive control system. A control voltage error signal is demodulated...
7227330 Overvoltage suppression technique for variable frequency drives operating reciprocating loads  
A motor control for a reciprocating load includes overvoltage suppression. The motor control comprises a variable frequency drive (VFD) operatively connected to a power source for operating a...
7221122 Inverter control device  
An inverter control device controls the operation of an inverter connected to an electric motor. A switching vector SV is determined as an output switching vector SVo to be supplied to the...
7218540 Power semiconductor device  
Inverter circuits are connected to a P electrode and an N electrode, and control the U, V and W phases, respectively, of a three-phase motor. The inverter circuits are connected to the three-phase...
7215055 Vehicle  
A rotating electric machine comprises a stator having stator salient poles, three-phase windings wound around said stator salient poles, a rotor rotatable held inside the said stator, and...
7193383 Enhanced floating reference frame controller for sensorless control of synchronous machines  
A method and system for controlling a power converter coupled to a polyphase power line. The method includes measuring at least two motor phase currents, obtaining a floating reference frame for...
7187152 AC servo drive without current sensor  
An AC servo drive without current sensor includes a PI (proportional integration) controller, at least two first-order controllers (polar point and zero point), a decoupling compensator, a...
7187155 Leakage inductance saturation compensation for a slip control technique of a motor drive  
An electronic drive for vector control of an induction motor controls slip and operating frequency in response to changes in stator voltage. The drive includes a torque control loop, a flux...
7183740 Motor drive apparatus, vehicle having the same mounted therein, and computer readable storage medium having a program stored therein to cause computer to control voltage conversion  
A control device receives a power supply current from a current sensor and a reactor current from a current sensor and detects a maximum value and a minimum value from the reactor current and from...
7180259 Driving apparatus for driving multiple induction motors  
The driving apparatus according to the invention includes an inverter that drives multiple induction motors connected in parallel, and a secondary current calculating circuit that calculates the...
7176651 Fault detection system for inverter  
An inverter fault detection system of the present invention is provided with: bus voltage monitor means for monitoring the bus voltage of a three-phase inverter; output voltage monitor means for...
7176652 Motor control apparatus  
An object of the present invention is to provide a motor control apparatus having excellent harmonic current control performance, that can simplify circuit configuration and circuit processing...
7176653 Electric motor drive  
The invention relates to an electric motor drive for operating an alternating-current motor. The electric motor drive comprises a frequency converter for controlling the motor, which frequency...
7173394 Apparatus and method for controlling inverter  
An apparatus and method for controlling an inverter are disclosed to allow an inverter to provide a stable output voltage to a motor regardless of a change in a DC input voltage. A difference...
7164242 Variable speed drive for multiple loads  
A variable speed drive is provided having a converter to convert an AC voltage to a DC voltage, a DC link to filter and store energy from the converter, and a plurality of inverters, wherein each...
7164254 Modulation methods and apparatus for reducing common mode voltages  
Methods and apparatus for reducing the common mode voltage generated by eliminating zero-voltage vectors in a rectifier/inverter variable frequency drive (VFD) system includes comparing three...
7164253 Motor drive control apparatus  
On end of a reactor (L1) is connected to a positive electrode of a battery (B1) and the other end is connected to a power line via a transistor (Q1) and to the ground via a transistor (Q2). By PWM...
7161323 Motor drive apparatus, electric actuator and electric power steering apparatus  
The disclosure concerns a a motor drive apparatus, an electric actuator and an electric power steering apparatus capable of continuous torque control up to the high drive speed and high torque...