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9018871 Power conversion apparatus  
A carrier generating unit applies a carrier that monotonically decreases to a switching control unit during either one of a first period that is a period immediately following a period in which a...
9018890 Electric motor having a pulse width modulator  
The invention relates to an electric motor having a stator and a rotor. The electric motor also comprises a controller, wherein the controller is connected to the stator and/or rotor, and is...
9000705 Power 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...
8982587 Compensating ripple on pulse with modulator outputs  
A ripple compensation apparatus comprises a ripple detection unit to detect a ripple on a dual DC bus, a waveform generation unit to generate a modulated waveform based on a base waveform and the...
8975847 Power conversion device  
A power conversion device includes a first capacitor connected in parallel to a direct-current power supply, plural power converters that drive plural synchronous machines, a second capacitor...
8971067 Output current distortion compensating apparatus in inverter  
An output current distortion compensating apparatus in an inverter is disclosed, the inverter including an inverter controller generating a PWM signal for controlling a PWM voltage generator,...
8971065 System for providing an alternating current, and control apparatus and method thereof  
A system for providing, from a direct current (DC) voltage source, an alternating current (AC) to an electrical grid outputting a grid voltage, the system including: a transformer for coupling to...
8963479 Power conversion device for a rotary electric machine  
A power conversion device includes an inverter unit and a control unit. The inverter unit includes high SWs and low SWs for each phase of coils of a motor. The control unit, in a case that the...
8964424 Power converter, control method thereof, and direct matrix converter  
A voltage control rate of an inverter has a DC component and an AC component. This AC component has a frequency which is six times a fundamental frequency of an AC voltage outputted by the...
8958219 Non-isolated inverter and related control manner thereof and application using the same  
A non-isolated inverter including a DC input-side, a capacitor connected in parallel with the DC input-side, an AC output-side connected in parallel with a load, and first and second bridge-arm...
8958222 Modulation of switching signals in power converters  
There is provided a method and control system for reducing noise in a power converter by controlling a switching device in the power converter according to a modulation scheme. The switching...
8937820 Switched-mode power supply apparatus and method  
The present invention relates to a switched-mode power supply apparatus and a corresponding method. For an effective compensation of non-linearities caused by dead-time and voltage drops in the...
8912767 Reactive energy compensator and associated method for balancing half-bus voltages  
A reactive energy compensator that can be electrically connected to an AC electrical network, including at least one input direct voltage bus, at least one voltage inverter including switches and...
8907604 PWM frequency pattern optimization for NVH  
An optimized pseudo-random period pattern can reduce audible noise in a system that includes an inverter circuit configured to provide power to an electric machine. A system can include a PWM...
8885368 Power converting apparatus suppressing switching noise by controlling switching operation  
A power converter for effectively reducing switching noise is provided. The power converter comprises a capacitor 111; switching devices Q11a and Q11b connected to the capacitor 111 in parallel;...
8878622 System and method for generating a pulse-width modulated signal  
In an embodiment, a method of generating a pulse-width modulated signal from an input signal includes calculating a finite number of basis functions of a first pulse-width modulated signal based...
8866435 Control device and control method for power control unit  
A control device controls an inverter controlling an output of a motor by PWM control. The control device calculates a reference frequency based on a torque and a rotation speed of the motor,...
8848402 Power factor correction apparatus  
A power factor correction apparatus is applied to an alternating-current voltage apparatus and a rear end circuit. The power factor correction apparatus includes a power factor correction unit, a...
8824169 Multiple inverter and active power filter system  
A multiple inverter with neutral line inductor and an active power filter system are disclosed. In the disclosure, the multiple inverter comprises at least two inverter units connected in...
8793034 Feature recognition for configuring a vehicle console and associated devices  
Methods and systems for a complete vehicle ecosystem are provided. Specifically, systems that when taken alone, or together, provide an individual or group of individuals with an intuitive and...
8787055 Inverter device  
An inverter device includes a DC positive input line and a DC negative input line, a main bridge which includes a pair of series-connected switching elements with diodes being connected in reverse...
8780595 Methods and systems for controlling a power converter  
A controller for controlling a power converter is described. The controller includes an input configured to receive at least one grid feedback signal, a filter, and an output. The filter is...
8750009 Controller of a power converter that uses pulse width modulation  
A controller of a power converter including an inverter that includes plural semiconductor switching elements. The controller suppresses an error between a voltage command and an inverter output...
8743571 Distributed power supply system with harmonic signal generation for stabilization  
A distributed power supply system in which no simultaneous disconnection from the system occurs when a system voltage momentarily drops is provided. It includes an inverter circuit that converts a...
8736142 Polarity switching circuit  
A polarity switching circuit includes: a first current-limiting resistor and a second current-limiting resistor connected to a DC high voltage; a first transistor switch, a second transistor...
8736102 Multifunctional power converter  
The multifunctional power converter apparatus and method includes an input power stage configured to receive a DC input voltage from a DC power source and convert the DC input voltage to an AC or...
8724351 Controller for load drive system  
A controller for a load drive system which can reduce a ripple current which flows in a smoothing capacitor even when an inverter is PWM controlled with a two-phase modulation includes a converter...
8710781 Power conversion device and method for controlling thereof  
In a power conversion device that includes a PWM converting means for generating a PWM pulse by comparing three-phase voltage commands with a triangular wave carrier signal, a power converter for...
8711586 Power converter and method including noise suppression by controlling phase shifting of converter cells  
The noise generated from a power converter is suppressed by increasing the noise frequency to a level not lower than the maximum frequency of the human audible range. To obtain the frequency of an...
8693221 Electric power converter apparatus  
An electric power converter apparatus includes an inverter circuit having a plurality of upper arm elements and a plurality of lower arm elements, a feedback controlling module calculating a...
8687383 Inverter and active power filter system utlizing an auxiliary capacitor module  
An inverter and an active power filter system have been disclosed in the invention, so that the application range of the inverter under the occasions of different capacitor requirement can be...
8686801 Power supply and DC-DC-conversion  
In an embodiment of a converter, a first oscillator provides switching signals for switching between charging and discharging of a capacitor, and a second oscillator is configured to add an offset...
8680916 High efficiency variable voltage supply  
There is disclosed a power supply stage, comprising: generating means for generating a power supply voltage from a high efficiency variable voltage supply in dependence on a reference signal;...
8670260 Multiple inverter and active power filter system  
A multiple inverter and an active power filter system are disclosed in the invention, said multiple inverter can decrease the volume and harmonics, increase the efficiency and decrease the cost,...
8669733 Engine power supply circuit, and flight control member provided with such a circuit  
A power supply circuit for an electric motor, the circuit comprising a plurality of inverter bridge arms, each having means for connection to a respective winding of the motor, each inverter...
8665003 Dead-time generating circuit and motor control apparatus  
A dead-time generating circuit includes a constant current circuit; a current generating circuit generating a capacitor-charge current; and a control circuit receiving a dead time control signal...
8659918 Method of controlling power conversion device  
A correction-term adder 1 compares a maximum value max(V*) with an absolute value of a minimum value min(V*). The correction-term adder 1 selects a signal 1−max(V*) when the maximum value max(V*)...
8653781 Variable frequency drive and rotation speed searching apparatus for an induction motor  
Provided is a variable frequency drive and a rotation speed searching apparatus for an induction motor incorporated therein. The rotation speed searching apparatus is featured by scanning the...
8653783 AC motor drive device  
A circuit switching element is provided that switches a step-up/step-down bidirectional chopper circuit, arranged between a DC bus and a power storage element, to a first chopper circuit or to a...
8649189 Power supply with single stage converter for performing power factor correction and resonant conversion  
A power supply has a single stage converter for performing power factor correction to reduce high-frequency harmonics in the input current and performs resonant conversion to achieve zero-voltage...
8625315 Inverter modulator with variable switching frequency  
An inverter control is used to control the output of a distributed power generating station, such as a photovoltaic (PV) solar power station, connected to a power grid. The power station is...
8624543 Switching strategy for switched reluctance machine  
A method of controlling a motor is provided. The method may determine a speed of the motor, and engage a soft chopping routine on a first switch and a second switch of each phase if the motor...
8625307 DC to AC power converting apparatus  
A neutral point clamped three-phase three-level inverter is connected to a first DC power supply and single-phase inverters are connected in series with AC output lines of individual phases of the...
8618681 Inverter generator control apparatus  
In a control apparatus for an inverter generator having a generator unit driven by an engine, a converter connected to the generator unit to convert an alternating current from the generator unit...
8605463 Resonant switching power supply device to reduce a frequency increase in light loads  
Provided is a resonant switching power supply device that can reduce a common mode noise as well as an increase in frequency when a load is light. A resonant switching power supply device 1...
8605461 Phase current detection device and power conversion device using the same  
A control section which repeats inverter control in units of an inverter control period having a predetermined length is provided. In the control section, a phase current detection period in which...
8598445 Solar home electrification with grid connection  
A means of providing solar powered electricity for day and nighttime use supported in part by power from the grid to allow a small generator to electrify the home or business with a small...
8587976 DC/DC converter with auxiliary converter for earth current compensation  
A DC/DC converter for converting an input DC voltage between input lines into an output DC voltage between output lines includes: an AC current forward path connected via switching electric...
8582324 Pulse width modulation controller and method for output ripple reduction of a jittering frequency switching power supply  
A pulse width modulation controller and method for output ripple reduction of a jittering frequency switching power supply detect the current of a power switch of the switching power supply to...
8558497 Reduced electromagnetic interference for pulse-width modulation  
A method and apparatus to drive a load using a pulse-width modulated (PWM) signal and spread a spectrum of the PWM signal across a plurality of frequencies while maintaining a constant duty cycle...