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| Number | Title | Issue Date |
| 7382636 | System and method for powering a load A power supply for inductively powering a remote device has an inverter operating at an operating frequency and a primary coil. A phase comparator compares the phase of the voltage or current delivered by the power supply. If the phase relationship detected by the c... | 06/03/2008 |
| 7375993 | High-voltage X-ray generator A power supply for a device which has a load, comprising a first resonant generator and a second resonant generator, coupled in parallel, each generator having a phase output. The power supply further comprises a control circuit coupled to the first and second gener... | 05/20/2008 |
| 7372397 | Energy storage in a radar level gauge A radar level gauge using microwaves for measuring a level of a surface of a product in a container, comprising a microwave unit, processing circuitry connected to said microwave unit, an interface for connecting said radar level gauge externally thereof, and a powe... | 05/13/2008 |
| 7372709 | Power conditioning system for energy sources Apparatus for conditioning power generated by an energy source includes an inverter for converting a DC input voltage from the energy source to a square wave AC output voltage, and a converter for converting the AC output voltage from the inverter to a sine wave AC ... | 05/13/2008 |
| 7368879 | Pendulum resonant converter and method A resonant switching converter comprising a first pair of series connected switches comprising a high side switch and a low side switch coupled across a DC input voltage, there being a first switched node between the switches; a second pair of series connected switc... | 05/06/2008 |
| 7369421 | Full bridge driver A full bridge driver includes a control chip outputting a first control signal and a second control signal, a full bridge switch assembly with four N-MOSs coupled to a DC power, a first side of a transformer, and two drivers. Moreover, one of the two drivers include... | 05/06/2008 |
| 7368691 | Induction heating apparatus Apparatus for providing electrical power to at least one inductor wherein the at least one inductor is disposed to inductively couple the electrical power to an electrically conductive object to heat the electrically conductive object by inducing electrical current ... | 05/06/2008 |
| 7365500 | Display device having lamp control circuit A driving device is provided, which includes: a switching unit directly connected to a first voltage from a source external to the driving device; a transforming unit indirectly connected to the switching unit for transforming the first voltage into a second voltage... | 04/29/2008 |
| 7365995 | Power converter A power converter may include a transformer having a primary winding and a secondary winding. A first high side switch and a first low side switch may be coupled in series along a first path of a full bridge circuit, having a first node between the first high side s... | 04/29/2008 |
| 7366000 | Half bridge inverter A half bridge inverter includes a push/pull control chip outputting a first control signal and a second control signal. Each duty cycle of the two control signals is smaller than 50%. Moreover, both a first buffer circuit and a second buffer circuit are coupled to t... | 04/29/2008 |
| 7362557 | Method, apparatus and article for bi-directional DC/DC power conversion A controller implements a state machine for operating the bi-directional power converter with a flexible load pattern while maintaining a thermal condition of the power converter within acceptable limits. The state machine implements a wait loop in response to selec... | 04/22/2008 |
| 7362594 | Adaptive resonant switching power system A resonant switching power system operates with two resonant frequencies. A first frequency depends on the secondary leakage inductance of an output transformer and capacitor. The first frequency varies with changes in the load because load changes alter the leakage... | 04/22/2008 |
| 7362077 | Pre-charge method for isolated boost converter A boost control module operates semiconductor switches of a boost converter circuit in an avalanche mode to precharge a boost output capacitor. The boost control module comprises a switching module that complementarily transitions a first semiconductor switch and a ... | 04/22/2008 |
| 7362601 | Power supply device A power supply device includes two input ports, two output ports, a transformer having primary and secondary windings, a switch device, and a controller. The switch device includes a switching element connected in series with the primary winding, and a capacitor. Th... | 04/22/2008 |
| 7358696 | Method and apparatus for PWM drive During PWM control in which an actuator (9) is connected between the output terminals of a bridge circuit made up of switching elements (121, 122, 221, 222) and power is applied to the actuator (9) with signals G1U, G1L, G2U... | 04/15/2008 |
| 7358627 | Electronic control systems and methods An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collec... | 04/15/2008 |
| 7355869 | Voltage conversion device and computer-readable recording medium having program recorded thereon for computer to control voltage conversion In a case where the deviation between a target voltage (Vdc_com1) and an output voltage (Vm) is larger than a specified value (A), a voltage command (Vdc_com2) of a voltage step-up converter (12) is calculated by adding the specified value (A) t... | 04/08/2008 |
| 7352598 | Inverter units with duty cycle control based on the detected, high and low output voltage An inverter unit includes a DC power source, an inverter circuit having two or more pairs of switching elements which are connected in parallel to the DC power source, so that a DC voltage of the DC power source is converted into a pulse train-like, pseudo-AC voltag... | 04/01/2008 |
| 7352549 | Method of automatically recognizing an electrical system The subject matter of the present invention is a method of automatically recognizing an electrical system by which both the voltage of an electrical system (2) and the phase angle between phases of the system are monitored so that human technical failure upon... | 04/01/2008 |
| 7352216 | High speed ramp generator A high speed ramp generator is presented. The high speed ramp generator is advantageous over the prior art because it provides a ramp response without the delay incident with a simple integrator approach. A closed loop system generates a continuous ramp and, in an o... | 04/01/2008 |
| 7352600 | Electric power unit There is no period of time when any of switching elements and switching elements is turned on in a certain switching frequency, any one switching element is turned on in a period of time except for a dead time period for the zero voltage switching, the switching ele... | 04/01/2008 |
| 7352599 | Switching power source apparatus A power-factor improving circuit applicable to a switching power source apparatus includes a rectifier having a diode bridge, a step-up reactor, a switching element, an output diode, a smoothing capacitor, a controller, and a variable reference voltage generator. If... | 04/01/2008 |
| 7348739 | Motor driving apparatus A motor driving apparatus makes a carrier signal of an inverter be synchronized with a carrier signal of a DC/DC converter, and determines a phase difference between both the carrier signals based on a ratio of an input voltage inputted to the DC/DC converter and an... | 03/25/2008 |
| 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 |
| 7342362 | Full-bridge soft switching inverter and driving method thereof A full-bridge soft switching inverter and a driving method thereof, using zero-voltage switching and conducting a circular current in a circuit including two n-channel MOSFET's so as to drive at least one load such as a cold cathode fluorescent lamp (CCFL) and a sig... | 03/11/2008 |
| 7342813 | Half bridge inverter with dual N-MOS A half bridge inverter with dual N-MOS includes a push/pull control chip outputting a first control signal with a duty cycle greater than 50% and a second control signal with a duty cycle greater than 50%. Moreover, both a first buffer circuit and a second buffer ci... | 03/11/2008 |
| 7342262 | Split-gate power module for suppressing oscillation therein The invention involves a method of packaging and interconnecting four power transistor dies to operate at a first frequency without oscillation at a second frequency higher than the first frequency but lower than a cutoff frequency of the transistors. The dies are m... | 03/11/2008 |
| 7342326 | Circuit arrangement for momentarily maintaining an internal operating direct current voltage in the event of an interruption in the vehicle electrical system power supply voltage A circuit arrangement, to which the vehicle electric system supply voltage is applied and which for briefly maintaining at least one internal normal d.c. voltage in the event of failure of the vehicle electric system supply voltage, includes a reserve energy accumul... | 03/11/2008 |
| 7342764 | Electronic control systems and methods An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collec... | 03/11/2008 |
| 7339802 | DC-AC converter and controller IC therefor An inventive inverter has a semiconductor switch circuit connected to the primary winding of a transformer. The semiconductor switch circuit is respectively controlled by PWM to supply a constant current to the load connected to a secondary winding of the transforme... | 03/04/2008 |
| 7339321 | Discharge-lamp ballast in particular for a vehicle headlight Ballast comprising input terminals receiving a DC voltage coming from a supply source on the vehicle, a chopping supply circuit functioning at a predetermined chopping frequency in order to supply as an output a voltage supplying the discharge lamp, and a filtering ... | 03/04/2008 |
| 7336513 | Method of compensating output voltage distortion of half-bridge inverter and device based on the method A method of compensating output voltage distortion of a half-bridge inverter and a device based on the method discloses that the method includes the steps of measuring the voltage of the capacitor of the half-bridge inverter and then detecting the output voltage of ... | 02/26/2008 |
| 7336059 | System and method for charging and discharging a superconducting coil A system and method for charging and discharging a superconducting coil. The system comprising a boost converter coupled between a low-voltage bus and a high voltage bus, and a buck converter coupled between the high-voltage bus and the coil. The system being config... | 02/26/2008 |
| 7336004 | Topologies for using multiple energy sources for power conversions A boost converter and a buck-boost converter supply power to a load from a series connection between a first and a second power source. ... | 02/26/2008 |
| 7336510 | Method and system for increasing load start-up capability of a DC-to-AC converter A power system for increasing a load start-up capability of a DC/AC converter includes a DC/AC converter, a processor coupled to the DC/AC converter and a memory subsystem coupled to the processor. The memory subsystem stores code that when executed by the processor... | 02/26/2008 |
| 7333348 | DC-DC converter There is provided a high-efficiency DC-DC converter which comprises a voltage resonance circuit to which electric power from a low-voltage direct-current power supply, including a household fuel cell and a solar cell, is input and performs DC-AC conversion by zero-v... | 02/19/2008 |
| 7333331 | Power unit device and power converter device A power unit device which can be made small, with which special measures of plant and labor at the time of assembly are unnecessary, and of which assembly is easy and universality in its manufacturing aspect is excellent. The power unit device has a heat sink having... | 02/19/2008 |
| 7327589 | Full-bridge circuit A full-bridge circuit for a heat dissipation system. The heat dissipation system further includes a fan and a control circuit. The control circuit outputs a first control signal and a second control signal. The full-bridge circuit includes a first control line havin... | 02/05/2008 |
| 7327545 | Electric generation control device of electric generator for vehicle An electric generation control device detects the occurrence of a failure such as a short circuit failure and an open failure in one of a pair of power transistors, which form a H bridge circuit composed of excitation switching elements and regeneration switching el... | 02/05/2008 |
| 7327587 | System and method for power conversion An ac-ac power converter system is provided for supplying power to an electrical load. The ac-ac power converter system provides an output voltage having variable amplitude and/or frequency. The ac-ac power converter system includes a boost inductor for applying a d... | 02/05/2008 |
