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| Number | Title | Issue Date |
| 8416592 | Control method for soft switch circuit in switch power supply The present invention relates to a control method for a soft switch circuit in a switch power supply, which controls first and second main power switch devices to be turned on and turned off constantly to generate an alternating main power filter current, and contro... | 04/09/2013 |
| 8358519 | Switch control circuit limiting the maximum switching frequency of a bridge circuit with a timer A switch control circuit for controlling a bridge circuit comprising: an upper and a lower transistor, connected to a positive and a negative voltage, respectively, and comprising a flywheel diode connected in parallel with each transistor. An LC-circuit filters the... | 01/22/2013 |
| 8339818 | Method and device to compensate for an asymmetrical DC bias current in a power transformer connected to a high voltage converter A method and a device to compensate for an asymmetrical DC bias current in a multi-phase transformer. The transformer is connected between an AC power system and an AC/DC or DC/AC high voltage converter. For each phase of the AC side of the transformer a current qua... | 12/25/2012 |
| 8050063 | Systems and methods for controlling a converter for powering a load Systems and methods for controlling a converter for powering a load are provided. According to one embodiment of the invention, a method for powering a load is provided. A power converter may be provided. At least one gating control signal having a switching pattern... | 11/01/2011 |
| 7965527 | Temperature protection device for electronic converters and related method A device for protecting an electronic converter, e.g. for halogen lamps, includes a comparator having an output as well as non-inverting and inverting inputs for receiving a first input signal indicative of the load applied to the converter and a second input signal... | 06/21/2011 |
| 7859870 | Voltage clamps for energy snubbing A power converter generates direct voltage and includes a phase-shifted PWM bridge with first and second controllable switches connected as a half-bridge with a first tap, for generating AC at the first tap. An output transformer includes a primary winding coupled t... | 12/28/2010 |
| 7764523 | Method of operating a converter circuit A method of operating a converter circuit is disclosed, wherein the converter circuit has a converter unit with a multiplicity of controllable power semiconductor switches and the converter unit is connected at the AC voltage end to an electrical AC voltage network.... | 07/27/2010 |
| 7715214 | Malfunction determining device for drive circuit and drive unit including the same, and method for determining malfunction in drive circuit A device and method for determining whether a malfunction is present in a drive circuit, which drives an electric device that generates counter-electromotive force, when all gates in the switching elements of the drive circuit are blocked. After the gates are blocke... | 05/11/2010 |
| 7643318 | Dual voltage wye-connected H-bridge converter topology for powering a high-speed electric motor A topology for a three-phase, wye-connected H-bridge converter allowing continued operation when one H-bridge phase has failed by bypassing the failed H-bridge, increasing dc-bus voltage to provide the required output load voltage, and decreasing switching frequency... | 01/05/2010 |
| 7529108 | Full-bridge digital power converter controller and method to compensate volt-second imbalance A digital controller for use with a full-bridge power converter which includes an isolation transformer that conducts first and second currents of opposite polarity during respective power-transfer phases. A current transformer senses the currents, and a non-zero cu... | 05/05/2009 |
| 7411797 | Converter including a control device for turning on an auxiliary valve with a time delay and a method for controlling such a converter The invention relates to a converter provided with a resonant circuit (16), which comprises a control device (24) adapted, in connection with a commutation of the phase current (iph) from a semiconductor element of turn-off type of a first c... | 08/12/2008 |
| 7403401 | DC-AC converter and method of supplying AC power A dc-ac converter capable of supplying a finely regulated ac drive voltage to a load is provided. For this purpose, the converter includes, in a primary winding of a transformer, a full-bridge or half-bridge type semiconductor switch circuit whose switches can be co... | 07/22/2008 |
| 7352544 | Method and apparatus for providing a remedial strategy for an electrical circuit A method and electrical circuit for dynamic reconfiguration of a DC-to-AC inverter comprising first and second power rails where each the rails has a power source. The method comprises monitoring the first and second power rails for short-circuit failure; and upon f... | 04/01/2008 |
| 7348755 | Time sliced DSP operation for very high frequency pulse width modulated controllers Methods and apparatus are provided for frequency scaling the PWM signal output of a controller/driver for an electrical device such as a BLDC motor. The apparatus comprises a number of multiple half-bridge assemblies, with each multiple half-bridge assembly connecte... | 03/25/2008 |
| 7313003 | Switching power supply unit The present invention provides a switching power supply unit capable of suppressing a surge voltage generated in a rectifier element more effectively. A first resonance circuit is constructed by capacitors in a surge voltage suppressing circuit and an inductor, and ... | 12/25/2007 |
| 7301788 | Power transform device and electronic device for reaching low acoustic noise A low acoustic noise solution for snubber circuits is utilized for relieving spike noise under a low-load mode of a snubber circuit, and for avoiding electromagnetic interference under a high-load mode of said snubber circuit. A power transform device utilizing the ... | 11/27/2007 |
| RE39926 | Arc-machining power supply with switching loss reducing element A power supply for performing arc-machining operation includes a primary rectifier connected to the commercial AC power source and an inverter coupled to the rectifier. A switching device is provided between the rectifier and the inverter. By controlling the power s... | 11/27/2007 |
| 7301755 | Architecture for power modules such as power inverters Power converters such as power modules configured as inverters employ modularized approaches. In some aspects, semiconductor devices are thermally coupled directly to thermally conductive substrates without intervening dielectric or insulative structures. Additional... | 11/27/2007 |
| 7292451 | Architecture for power modules such as power inverters Power converters such as power modules configured as inverters employ modularized approaches. In some aspects, semiconductor devices are thermally coupled directly to thermally conductive substrates without intervening dielectric or insulative structures. Additional... | 11/06/2007 |
| 7292463 | DC-AC converter and controller IC therefor A semiconductor switch circuit is connected to a primary winding of a transformer having a secondary winding connected to a load. The semiconductor switch circuit has switches controlled by PWM to provide a controlled constant current. In the inventive inverter, con... | 11/06/2007 |
| 7289343 | Architecture for power modules such as power inverters Power converters such as power modules configured as inverters employ modularized approaches. In some aspects, semiconductor devices are thermally coupled directly to thermally conductive substrates without intervening dielectric or insulative structures. Additional... | 10/30/2007 |
| 7286375 | Dead-time compensation method for electric drives Methods and apparatus are provided for compensating for a deviation in voltage output of a phase leg inverter when dead-time periods are inserted to prevent shoot-through failures. The method includes determining a pulse width for an input signal to the inverter suc... | 10/23/2007 |
| 7272020 | Isolated, current-fed, pulse width modulation, DC-DC converter A current-fed DC-DC converter has a topology that improves converter performance and operates an input inductor in continuous conduction mode. The configuration and operation of the converter produces reduced requirements for circuit component ratings and leads to f... | 09/18/2007 |
| 7272022 | DC-AC converter and method of supplying AC power A dc-ac converter capable of supplying a finely regulated ac drive voltage to a load is provided. For this purpose, the converter includes, in a primary winding of a transformer, a full-bridge or half-bridge type semiconductor switch circuit whose switches can be co... | 09/18/2007 |
| 7251741 | Method of controlling signal generator A method of controlling a semiconductor device using a microcomputer having a timer is provided. An interrupting step interrupts the semiconductor device using the timer, by generating a control signal for controlling a timing of turning on/off the semiconductor dev... | 07/31/2007 |
| 7245017 | Liquid discharge head and manufacturing method thereof The liquid discharge head has a three-dimensional structure which defines a space including a pressure chamber filled with liquid and a flow channel for supplying the liquid to the pressure chamber, the three-dimensional structure being formed by depositing a compos... | 07/17/2007 |
| 7245508 | Power conversion apparatus A power conversion apparatus includes serially connected arms U and X, serially connected arms V and Y, serially connected arms W and Z, and a capacitor, the pairs of serially connected arms and the capacitor all connected in parallel to one another. The input-side ... | 07/17/2007 |
| 7239098 | Digital adaptive sensorless commutational drive controller for a brushless DC motor Various embodiments of an electrical motor, a brushless DC motor controller, and applications thereof. In one embodiment, a fluid-moving device is provided with a brushless DC motor and a motor controller. The controller may include a set of comparators and a clocke... | 07/03/2007 |
| 7230503 | Imbalanced differential circuit control A differential circuit includes first and second side circuits which are coupled to receive control signals in such a way as to introduce an intentional imbalance in the differential circuit for certain benefits discussed herein. An exemplary pseudo-differential LC ... | 06/12/2007 |
| 7227259 | Low-inductance circuit arrangement for power semiconductor modules A circuit arrangement for a power semiconductor module provides low parasitic inductances and low loss. An electrically insulating substrate supports metallic ribbon connectors which in turn power attached semiconductor components. DC port conducts are positioned in... | 06/05/2007 |
| 7227763 | Power supply apparatus using half-bridge circuit Disclosed is a power supply apparatus using a half-bridge type driving circuit, which is intended for the purpose of the compensation of a power factor, the achievement of a low crest factor and the maintenance of a constant output. The power supply apparatus using ... | 06/05/2007 |
| 7214934 | Radio frequency power generator A RF power generator for exciting inductively coupled plasma for spectrometry includes an induction coil for exciting the plasma as part of its load circuit. The load circuit also comprises a capacitor connected in parallel with the induction coil. The RF power gene... | 05/08/2007 |
| 7211981 | Electric motor movement controlling method, an electric motor movement controlling system and a compressor The present invention provides an electric motor movement controlling method, where the electric motor is fed by a total voltage proportional to the network voltage. The method comprises steps of making a first measurement of level of the network voltage at a first ... | 05/01/2007 |
| 7212036 | Driving apparatus of H bridge circuit and protection method of the same In order to protect semiconductor switching-devices employed in an H bridge circuit against an over-voltage without using a special protection circuit, a control circuit outputs a control signal to a driving circuit for driving the H bridge circuit in order to turn ... | 05/01/2007 |
| 7184286 | Bridge for driving a direct-current or alternating current load A DC/DC bridge having a power stage provided with controllable semiconductor switches controls a direct currently load, and comprises two bridge sections, one of which bridge sections conducts direct currently while the other bridge section is controlled via pulse w... | 02/27/2007 |
| 7184279 | Solid state switching circuit A solid state switching circuit utilizes a transformer in series with the circuit's switching device by which energy initially stored in the primary of the transformer is recovered in resonant circuitry connected to the secondary of the transformer for transfer of t... | 02/27/2007 |
| 7180758 | Class E amplifier with inductive clamp A power supply including an inverter receiving a DC input signal from a DC input source (11). The inverter is implemented as a single-ended inverter. Each inverter is driven by a signal source (13A, 13B), which outputs an AC signal. The output f... | 02/20/2007 |
| 7138846 | Field effect transistor switch circuit A field effect transistor switch circuit may include: (1) first, second, and third switch terminals; (2) a first field effect transistor, a pair of the main electrodes of which are connected respectively to the first switch terminal and the second swit... | 11/21/2006 |
| 7116012 | Stable power conversion circuits A power conversion circuit includes a current section, a transformer, and a voltage section. The current section includes inductors configured to produce a boosted output voltage from a voltage sourse when then current section is operating in a forward direction. Th... | 10/03/2006 |
| 7115922 | H-bridge drive utilizing a pair of high and low side MOSFET's in a common insulation housing A fully protected H-bridge for a d-c motor consists of two high side MOSFETs and a control and logic IC on a first conductive heat sink all within a first package and two discrete low side MOSFETs. The entire bridge is controlled by the IC. Shoot thru protection is ... | 10/03/2006 |
