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| Number | Title | Issue Date |
| 7602620 | Controller for power converter A controller for providing out of phase drive signals to a power converter having at least a first power unit and second power unit. The controller may comprise input circuitry adapted to receive a first signal from a first path and a second signal from a second pat... | 10/13/2009 |
| 7602621 | Half bridge converter A half bridge converter having a pulse width control unit, a level regulating unit, a half bridge switch unit, an electricity converting unit and a feedback unit is disclosed. The level regulating unit receives a first DC electricity and boosting the first DC electr... | 10/13/2009 |
| 7599198 | Resonance converter and synchronous rectification driving method thereof A resonance converter and a synchronous rectification driving method thereof are provided. The resonance converter includes a switch circuit having at least two first switches, a resonance circuit having a resonance frequency, a transformer, and a full-wave rectific... | 10/06/2009 |
| 7589981 | 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... | 09/15/2009 |
| 7589980 | DC-DC converter In a DC-DC converter of the present invention, a converting circuit converts a DC-DC voltage outputted from a DC power supply into an AC voltage, and to output to a series circuit in which a primary winding of a first transformer, a first reactor, and a current reso... | 09/15/2009 |
| 7586760 | Snubber capacitor resetting in a DC-to-DC converter A DC-to-DC converter and associated methods are provided for controlling the discharge of snubber capacitances during a light/no load buck mode of operation. An operating method for a DC-to-DC converter detects conditions corresponding to a light/no load buck mode o... | 09/08/2009 |
| 7580271 | Apparatus and method for suppressing the input current inrush for a voltage converter in a pre-charge stage An apparatus and method are provided for suppressing the input current inrush for a voltage converter in a pre-charge stage. The voltage converter comprises a power input for receiving an input current, a power output for supplying an output voltage for a load, and ... | 08/25/2009 |
| 7567443 | Power converter A power converter is provided which comprises two main MOS-FETs 4, 5 connected in series to a DC power source 1; an oscillator 2 which has two capacitors 3a, 3b connected in parallel to main MOS-FETs 4, 5; a pr... | 07/28/2009 |
| 7561446 | Double-clamped ZVS buck-boost power converter A transformer-coupled buck-boost DC-DC power converter is disclosed. An active clamp circuit is provided to form a resonant circuit with the transformer to control the slew rate of the secondary current and allow the secondary switch to be turned ON at conditions of... | 07/14/2009 |
| 7558080 | Power converter system A power converter system including an LC oscillator circuit, an oscillator drive circuit for driving the LC oscillator circuit, a rectifier circuit coupled to the LC oscillator circuit for providing a DC output, and a switching circuit for controlling the duty cycle... | 07/07/2009 |
| 7554820 | Series resonant DC-DC converter A series resonant Dc-DC converter powers an audio amplifier as a load. The series resonant DC-DC converter may include a power input stage, a switching stage, a series resonant stage, a transformer stage and a power output stage. The series resonant DC-DC converter ... | 06/30/2009 |
| 7518886 | Multiphase soft switched DC/DC converter and active control technique for fuel cell ripple current elimination DC/DC converter has a transformer having primary coils connected to an input side and secondary coils connected to an output side. Each primary coil connects a full-bridge circuit comprising two switches on two legs, the primary coil being connected between the swit... | 04/14/2009 |
| 7502234 | Planar transformer power supply A planar transformer power supply for an electrosurgical device to minimize stray capacitance comprising a step down/step-up isolation transformer and circuitry to limit the effects of a short circuit in the output of the planar transformer power supply on the input... | 03/10/2009 |
| 7499291 | DC power transmission system of voltage source converter using pulse-interleaving auxiliary circuit A DC power transmission system of a voltage source converter using a pulse-interleaving auxiliary circuit is disclosed. The converter system comprises an IGBT converter for converting an AC power to a DC power or the DC power to the AC power; an open Y-Y transformer... | 03/03/2009 |
| 7499290 | Power conversion Components, systems and methods for generating variable frequency AC voltage from a DC power supply are described. The components include a full-bridge (FB) parallel load resonant (PLR) converter which operates in discontinuous conduction mode. The PLR converter inc... | 03/03/2009 |
| 7495933 | Resonance transducer There is provided a resonance transducer including a main bridge linked with an input signal. The resonance transducer includes a transformer assembly across which an output signal can be tapped, a resonance circuit and a control circuit. In this arrangement, the tr... | 02/24/2009 |
| 7489527 | DC transformer with an output inductance integrated on a magnetic core thereof and a DC/DC converter employing the same A DC/DC converter includes an input filter, a half-bridge converter without PWM (Pulse Width Modulation) control function, a synchronous rectifier, an output capacitor, and a DC transformer. The DC transformer includes a magnetic core, a primary winding, a first sec... | 02/10/2009 |
| 7489526 | Power and information signal transfer using micro-transformers A power converter provides power across an isolation barrier, such as through the use of coils. A coil driver has transistors connected in a positive feedback configuration and is coupled to a supply voltage in a controlled manner by measuring the output power and o... | 02/10/2009 |
| 7480155 | Digital generator of phase shift modulation A digital generator of phase shift modulation receives two binary coded numbers (F) and (P), that represent a requested frequency value and a requested phase value, respectively, and generates two pairs of phase-shifted signals a, b and c, d. One pair of the phase-s... | 01/20/2009 |
| 7466566 | DC-AC converter, controller IC therefor, and electronic apparatus utilizing such DC-AC converter An inverter has a semiconductor switch circuit provided in the primary circuit of a transformer. The switch circuit is controlled by a PWM circuit. The switch circuit is operated on the basis of an intermittent-operation signal having an ON state and OFF state to: s... | 12/16/2008 |
| 7466567 | Half-bridge CCFL driving apparatus A half-bridge CCFL driving apparatus uses a bridge rectifier to convert AC into a DC voltage and stores the DC voltage in a capacitor unit. The capacitor unit averages the DC voltage into two voltages that are equal for outputting. Then, the primary winding of the t... | 12/16/2008 |
| 7457136 | Overcurrent protective device for switching element An overcurrent protective device has a current detecting section and a control section. The current detecting section detects the amount of a current flowing through switching elements of an inverter device. The control section determines whether the inverter device... | 11/25/2008 |
| 7443698 | Converter circuit for switching of a multiplicity of switching voltage levels A converter circuit is disclosed for switching of a multiplicity of switching voltage levels, which have n first switching groups for each phase (R, S, T), with the n-th first switching group being formed by a first drivable bidirectional power semiconductor switch ... | 10/28/2008 |
| 7440301 | High frequency excitation system A power module is adapted to be connected to a voltage source and to supply power to a load. The power module includes a switching bridge that includes a first power transistor and a second power transistor, a first gate controller for driving the first power transi... | 10/21/2008 |
| 7436684 | DC/DC-rectifier with reduced losses A DC/DC-rectifier includes a transformer and a primary side bridge. The primary side bridge comprises a first pair of switches and a second pair of switches, and a secondary side bridge also comprises a first pair of switches and a second pair of switches. The switc... | 10/14/2008 |
| 7433211 | System and method for input current shaping in a power converter A power converter delivers electrical power from an electrical power source to a load according to a plurality of operation modes, where at least one of the operation modes is a peak current switching mode. Under the peak current switching mode, a switch controller ... | 10/07/2008 |
| 7433207 | Bi-directional isolated DC/DC converter A bi-directional converter for converting voltage bi-directionally between a high voltage bus and a low voltage bus, having a switching converter connected across the high voltage bus, the switching converter having first and second switching modules connected in se... | 10/07/2008 |
| 7426124 | DC-AC converter A DC-AC converter has two half-bridge circuits using an input feedback signal and an input clock signal together with time delay circuits, wherein one of the half-bridge circuits drives one pair of corresponding FETs and the other half-bridge circuit drives the othe... | 09/16/2008 |
| 7417875 | Power converter employing integrated magnetics with a current multiplier rectifier and method of operating the same A power converter having input and output nodes and a method of operating the same. In one embodiment, the power converter includes a switching circuit including first, second and third active phase legs. Each of the first, second and third active legs includes a fi... | 08/26/2008 |
| 7412766 | Method of fabricating coil-embedded inductor A method of fabricating a coil-embedded inductor provides steps for obtaining uniform density of coil-embedded inductor. The cavity of a first die is filled with dust before being flipped, and then filled with dust a second time. The dust in the cavity is pressed on... | 08/19/2008 |
| 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 |
| 7408794 | Triple voltage dc-to-dc converter and method A circuit and method of providing three dc voltage buses and transforming power between a low voltage dc converter and a high voltage dc converter, by coupling a primary dc power circuit and a secondary dc power circuit through an isolation transformer; providing th... | 08/05/2008 |
| 7405955 | Switching power supply unit and voltage converting method The present invention provides a switching power supply unit and a voltage converting method capable of suppressing a surge voltage applied to an output rectifier element more effectively. Energy in the direction of suppressing reverse voltages (surge voltages) appl... | 07/29/2008 |
| 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 |
| 7403400 | Series interleaved boost converter power factor correcting power supply A power factor correcting power supply includes an input stage power converter and an output stage power converter. The input stage power converter includes a plurality of series connected boost switches and a power factor correction controller. The power factor cor... | 07/22/2008 |
| 7388761 | High efficiency parallel post regulator for wide range input DC/DC converter Apparatus, methods, system and devices for providing a high efficiency parallel post regulator for a wide range input DC/DC converter. The wide input range DC/DC converter achieves zero-voltage-switching in the primary side switches in full range load due to 0.5 dut... | 06/17/2008 |
| 7388760 | Switching power supply circuit A wide-range compatible switching power supply circuit employs switching frequency varying control and allows enhancement of its AC to DC power conversion efficiency when a large AC input voltage is used. A coupled resonant circuit employing electromagnetic coupling... | 06/17/2008 |
| 7379309 | High-frequency DC-DC converter control A high-frequency DC-DC converter. The high-frequency DC-DC converter comprises a resonant power stage and a controller to operate the resonant power stage. The resonant power stage is controlled by the controller with at least one of a variable frequency mode and a ... | 05/27/2008 |
| 7375985 | High efficiency single stage bidirectional converter The present invention focuses on the development of a high-efficiency single-stage bidirectional converter with multi-input power sources. In the present invention, it takes a three-winding coupled inductor as the main component of energy transmission, and utilizes ... | 05/20/2008 |
| 7375986 | Method and device for producing an electric heating current, particularly for inductive heating of a workpiece A heating current used to inductively heat a metallic or magnetic work-piece is generated by an inverter supplied by a supply voltage. The inverter includes four switching elements arranged in an H-bridge circuit having two parallel longitudinal branches and a trans... | 05/20/2008 |
