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8184455 |
Power adapter having power factor correction circuit, switch voltage regulation circuit and voltage stabilization circuit controlled by feedback signal
A power adapter to receive at least one AC input power and transform to DC primary output power includes a power factor correction circuit to receive the AC input power and modulate to become a...
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8174850 |
Method and circuit for avoiding hard switching in half bridge converters
A half bridge switching dc-dc converter an input dc voltage to an output dc voltage. The converter includes a switching circuit for receiving the input dc voltage and generating a periodic square...
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8164925 |
Non-contact power feeder
[Problems] To provide a non-contact power feeder that is high efficient and high power factor and has no load dependence.[Means for Solving Problems]A series capacitor Cs1 is connected to a primary...
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8159847 |
Method and arrangement in connection with a brake chopper
A method of controlling a brake chopper and a control arrangement, the brake chopper being connected between the positive and the negative rails of an intermediate voltage circuit feeding an...
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8159202 |
Quasi-continuous voltage regulator with dual polarity outputs
A controller includes a hysteretic circuit that provides a first ON level pulse when a corresponding first negative regulated voltage rises above a respective first voltage threshold. Similarly, a...
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8154898 |
Current driven bipolar high voltage driver for capacitive loads
A circuit for generating a high voltage alternating current to drive a load has a current source having a first terminal and a second terminal. The circuit further has an output terminal and a...
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8154893 |
Three-phase power converting apparatus
A three-phase inverter circuit including a DC portion including capacitors connected between output terminals of a solar battery and single-phase inverters connected in series with AC output lines...
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8144492 |
Current controlled power converter
A current controlled power converter includes a converting part configured to convert a three-phase ac voltage into a dc voltage or converts a dc voltage into a three-phase ac voltage, ac side...
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8134850 |
Systems and methods for frequency control of a voltage converter
Various embodiments of the present invention provide voltage converters and methods for using such. As one example, a voltage converter is disclosed that includes a transformer, an operational...
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8130524 |
Bi-directional DC to DC power converter having a neutral terminal
A bi-directional DC to DC power converter includes two DC sources, two inductors respectively connected to the two DC sources, a first switch and a second switch respectively connected to the two...
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8120265 |
Lamp driver for operating a gas discharge lamp
A lamp driver circuit for operating a gas discharge lamp (La) is proposed, which comprises a switched mode power supply circuit (SMPS) and a first and a second output terminal (OT1, 0T2) for...
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8120306 |
Voltage source inverter with a voltage offset
Methods and apparatus are provided for operation of a voltage source inverter. A method of operating a voltage source inverter having an output with multiple voltage phases having a DC voltage...
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8116105 |
Systems and methods for uninterruptible power supply control
Systems and methods are provided for distributing power to a load by controlling an uninterruptible power supply that has an inverter and a filter, where the filter has an inductor and a capacitor....
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8111531 |
Interleaved soft switching bridge power converter
An interleaved soft switching bridge power converter comprises switching poles operated in an interleaved manner so as to substantially reduce turn-on switching losses and diode reverse-recovery...
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8107263 |
Series resonant converter
A series resonant converter circuit that reduces power loss is provided that includes an inverter circuit having at least a pair of first and second switching elements that is connected between DC...
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8102142 |
Double ended inverter system for a vehicle having two energy sources that exhibit different operating characteristics
A double ended inverter system for an AC electric traction motor of a vehicle is disclosed. The inverter system serves as an interface between two different energy sources having different...
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8102677 |
Switching power supply device and method for adjusting dead time thereof
A resonant switching power supply device includes: a first switching element and a second switching element which are configured to convert and adjust power. A capacitance of a first/second...
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8094474 |
Drive controller for power conversion circuit
A drive controller is provided, for controlling driving of a power conversion circuit. The power control circuit includes a switching element for increasing/decreasing an absolute value of current...
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8084974 |
Inverter device
There is provided an inverter device capable of simplifying the circuit structure, lowering the cast, and downsizing of the device. The inverter device detects a switching change of an inverter by...
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8081494 |
Fully integrated multi-phase grid-tie inverter
In a grid-tie inverter, the DC input is phase and pulse-width modulated to define multiple phase shifted voltage pulses with the width of each pulse being modulated according to the grid AC...
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8077491 |
Inverter controller
A PWM operation unit includes a modulation-mode selecting unit selecting a two-phase modulation mode signal and a carrier-wave-synchronous-mode select command, a modulation-wave generating unit...
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8059434 |
Power conversion device and control method thereof
A power conversion device is provided for converting a DC voltage to an alternating current corresponding to an AC voltage according to the AC voltage, which includes a power conversion unit and an...
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8054652 |
Systems and methods for off-time control in a voltage converter
Various embodiments of the present invention provide voltage converters and methods for using such. As one example, a voltage converter is disclosed that includes a transformer with a first winding...
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8054651 |
Simple and effective self regulating inductive power transfer system
An inductive power transfer system for coupling a power source to a load across an air gap is provided, including a primary unit and a secondary unit separable from the primary unit and arranged to...
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8054031 |
Converter device, rotating electrical machine control device, and drive device
A converter device includes a converter circuit that includes a reactor connected to a primary side power supply, and a step-up feeding device that has a step-up switching element connected to the...
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8050064 |
Semiconductor power conversion device
A surge voltage target setting unit obtains a main circuit power supply voltage of a semiconductor power conversion device based on an inter-terminal voltage of a semiconductor switching element...
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8040695 |
Method for portioning output current of a DC-DC converter
At least some aspects of the invention are directed to methods and apparatus for controlling an uninterruptible power supply and subsystems of a UPS. A first aspect of the invention is directed to...
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8036000 |
Resonant converter system and controlling method thereof having relatively better efficiency
The configurations of a resonant converter system and a controlling method thereof are provided. The proposed resonant converter system includes a resonant converter and a hybrid control apparatus...
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8030601 |
Heating device for an inductive cooking device
A heating device for an inductive cooking device is provided and includes a first resonant circuit, with at least one first and one second inductor, for the transmission of heat energy to a heating...
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8031497 |
Three-leg power converter apparatus
A three-leg power converter apparatus including first, second and third input/output ports, a three-leg bridge converter, a filter circuit, a decoupling circuit and a controller is presented. The...
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8026684 |
Electronic control system
The invention relates to an electronic control system for controlling a voltage across a load, in particular across a fan motor of a motor vehicle, as a function of a control signal, comprising: a...
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8027183 |
3-phase inverter module, motor driving apparatus using the same, and inverter integrated circuit package
A 3-phase inverter module is provided, which includes first and second U-phase switching elements connected in series to each other to constitute a U-phase inverter, first and second V-phase...
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8027180 |
Power generating apparatus
A power generating apparatus including an AC generator that supplies electric power to a load including a voltage accumulating means, an inverter that applies AC control voltage to armature winding...
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8027181 |
Load drive device and vehicle equipped with the same
A surge voltage generated by the switching operation of an IGBT element and voltage variation generated in an equivalent series resistance of a capacitor are superimposed on an input voltage of an...
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8027179 |
Inverter circuit and method for operating the inverter circuit
An inverter circuit having a primary circuit with a first choke for periodically connecting a primary winding to a DC voltage present at an input of the inverter circuit, a secondary circuit with a...
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8026691 |
Double ended inverter system with a cross-linked ultracapacitor network
A double ended inverter system for an AC traction motor of a vehicle includes a fuel cell configured to provide a DC voltage, an impedance source inverter subsystem coupled to the fuel cell, a DC...
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8014177 |
Switching power supply with pulse frequency modulation control
A switching power supply exhibits high conversion efficiency and facilitates reducing the size thereof. The switching power supply includes a half-bridge circuit including a first series circuit...
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8009443 |
DC/DC converter and AC/DC converter
A DC/DC converter (1) having a plurality n of two-pole inverters (2a, 2b) connected in parallel or in series, n transformers (Ta, Tb) and n two-pole rectifiers (3a, 3b) connected in parallel or in...
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7999527 |
Switching controller having programmable feedback circuit for power converters
A switching controller for a boost power converter includes a switching-control circuit and a programmable feedback circuit. The programmable feedback circuit is coupled to an output of the boost...
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7990745 |
Apparatus for controlling H-bridge DC-AC inverter
The present invention discloses an apparatus for controlling an H-bridge DC-AC inverter, comprising an H-bridge DC-DC converting circuit capable of converting unstable DC power into stable DC power...
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7986535 |
Methods and apparatus for a cascade converter using series resonant cells with zero voltage switching
A method of providing power to a load is provided. A first series resonant converter is provided. A second SRC is operably coupled to the first SRC in a cascade connected arrangement. First and...
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7983059 |
High frequency power converter based on transformers
A transformer-based power conversion system includes a primary coil is provided in a current path that includes a single energy switch. An oscillator is coupled to a control input of the energy...
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7974106 |
Ripple cancellation
Systems, methods and devices for power generation systems are described. In particular, embodiments of the invention relate to the architecture of power conditioning systems for use with fuel cells...
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7974113 |
Electric power unit for induction heating
Reverse conducting type semiconductor switches are arranged in a bride from, an energy storage capacitor is connected with its DC terminal to obtain a magnetic energy regeneration switch, and then...
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7973491 |
Multi-lamp backlight apparatus
A multi-lamp backlight apparatus is disclosed. The multi-lamp backlight apparatus includes 2N lamps, N balancing transformers, and a high-voltage power source. N is a positive integer and k is an...
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7973492 |
Power supply for plasma display panel, plasma display device including the same, and associated methods
A power supply of a plasma display device includes a power source unit configured to convert a direct current source into an alternating current source, a transformer including a primary side...
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7969757 |
Apparatus providing bias to solar cells
Solar panels of certain technologies may experience a degradation of their efficiency as a result of exposure to sunlight, either prior to installation or during normal operation. A direct current...
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7957167 |
Semiconductor element drive device with level shift circuit and apparatus including the same
A high-reliability IGBT drive device in which the high- and low-voltage side IGBTs are complementarily ON/OFF controlled before and after dead time. A reset pulse that turns OFF the high-voltage...
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7952900 |
H-bridge buck-boost converter
An H-bridge buck-boost converter includes a first half-bridge portion having at least one first transistor, an inductor portion connected to the first half-bridge portion at a first connection, a...
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7948194 |
Waveform current monitor using RDSon of low-side bridge FET
An apparatus for monitoring current for a motor drive including at least high-side and low-side switching transistors includes a driver circuit for driving a gate of the low-side switching...
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