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| Number | Title | Issue Date |
| 8130520 | Power supply apparatus and semiconductor integrated circuit device The present invention is directed to largely improve the efficiency at the time of light load of a power supply apparatus using a power factor correction (PFC) controller. A PFC controller is provided with a voltage-current converter. The voltage-current converter c... | 03/06/2012 |
| 7924584 | Power supply switching circuit for a halogen lamp A power supply and methods are provided. The power supply includes a bi-forward converter and a feed forward circuit. The bi-forward converter is operable to convert an input voltage into an output voltage. The feed forward circuit is operable to detect a peak volta... | 04/12/2011 |
| 7656691 | Charge mode control of a serial resonance converter The present invention relates to an apparatus and a method for converting power from a power input to a DC output current or voltage, where a first feedback circuit a traditional feedback. The converter type is a resonant DC-DC converter. The scope of the invention ... | 02/02/2010 |
| 7616464 | Reverse current control system for a power converter A reverse current control system for first power converter having a synchronous rectifier and an output inductance includes a reverse current module. The reverse current module monitors a first voltage that is based on an output voltage of the output inductance and ... | 11/10/2009 |
| 7432473 | Electrofusion machine with improved functions A portable electrofusion machine includes: a power supply circuit having a triac configured to have a proper regulation for dropping a commercial voltage to a voltage adapted for a fitting; and a printer unit integrated with the electrofusion unit, for printing info... | 10/07/2008 |
| 7391631 | Switching power source device A switching power source device is provided which comprises a drive controller 40 connected between an error amplifier 26 and changeover circuit 37. A second comparator 52 of drive controller 40 compares an output voltage or an equ... | 06/24/2008 |
| 7365997 | Synchronous switching control circuit for power converters The present invention provides a synchronous switching control circuit for variable switching frequency power converters. It comprises a first circuit to generate a first signal in response to an input synchronous signal of a power converter. A second circuit is cou... | 04/29/2008 |
| 7358712 | Power supply control circuit and control method thereof A power supply control circuit includes: a conducting part configured to be controllable in its a conducting amount for conducting a power supply current to a load circuit; a current change ratio detecting part detecting a change rate of the power supply curr... | 04/15/2008 |
| 7355368 | Efficient in-rush current limiting circuit with dual gated bidirectional hemts A boost converter in accordance with an embodiment of the present application includes an input rectifying bridge adapted to rectify an input AC voltage, a first inductor connected to the input rectifying bridge, a output capacitor coupled to first inductor for conn... | 04/08/2008 |
| 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 |
| 7340158 | Method and circuit configuration for controlling a polyphase brushless electric motor A method is specified for controlling a polyphase brushless electric motor, wherein the motor phase currents which are associated with the phases are produced by clocked variation of the respectively applied electrical potential. In this case, the motor phase curren... | 03/04/2008 |
| 7336511 | Power supply control loop with multiple leveling modes A method and apparatus for controlling a power supply. The system includes a power supply and a controller for outputting a command signal to regulate the operation of the power supply. The controller determines the command signal based on at least one error signal ... | 02/26/2008 |
| 7312962 | Intelligent overcurrent protection for power supplies The present invention is a method and system for preventing an output of current greater than a desired amount for a redundant power supply system. In an embodiment of the present invention, redundant power supplies may be shut down when the sum of the output curren... | 12/25/2007 |
| 7309850 | Measurement of current-voltage characteristic curves of solar cells and solar modules A solar cell or solar module is measured during a short pulse of light in such a way that the resulting data for current and voltage at each light intensity is the same as would be measured under steady-state illumination conditions and therefore predictive of the a... | 12/18/2007 |
| 7276863 | LED array driving apparatus and backlight driving apparatus using the same The present invention relates to an LED array driving apparatus and a backlight driving apparatus using the same which enables regulation of analogue and PWM dimming for each channel and LED of a backlight, thereby allowing uniform luminance and color in all regions... | 10/02/2007 |
| 7257193 | X-ray source assembly having enhanced output stability using tube power adjustments and remote calibration An x-ray source assembly includes an anode having a spot upon which electrons impinge based on power level supplied to the assembly, and an optic coupled to receive divergent x-rays generated at the spot and transmit output x-rays from the assembly. A control system... | 08/14/2007 |
| 7215100 | Generator transient regulator An apparatus for regulating a transient response of an output signal of an electrical generator. The apparatus comprises a tapped output winding means for providing a first AC signal and a second AC signal. The first and second AC signals have respective RMS values.... | 05/08/2007 |
| 7209545 | X-ray source assembly having enhanced output stability, and fluid stream analysis applications thereof An x-ray source assembly (2700) and method of operation are provided having enhanced output stability. The assembly includes an anode (2125) having a source spot upon which electrons (2120) impinge and a control system (2715/2720) for con... | 04/24/2007 |
| 7193871 | DC-DC converter circuit Provided is a DC-DC converter circuit which is stably operated without being affected by a size of an output capacitor (111) and a cost thereof. When a switching element is turned on so that a charge current that was flowing into an output capacitor flows int... | 03/20/2007 |
| 7180761 | Constant voltage control apparatus capable of reducing feedback lines Provided is a constant voltage control apparatus capable of reducing feedback lines. In the constant voltage control apparatus, a first amplifier amplifies an output voltage applied to a pair of output terminals. A second amplifier amplifies a voltage drop between o... | 02/20/2007 |
| 7180279 | Method for driving pulse-width-controlled inductive loads, and a drive circuit for this purpose When a switch (20) that is in series with the inductive load (10) is turned on, the rise behavior of the current (I) is first of all detected until a nominal value (Iref) is reached, and a pulse duty factor (Te/Ta) of a pulse width modulator device ( | 02/20/2007 |
| 7176658 | Controller for permanent magnet alternator The invention is a control system that, among other things, controls a permanent magnet alternator and provides relatively accurate voltage regulation. The control system may include one or more of the following: (1) a rectification system to rectify and regulate th... | 02/13/2007 |
| 7173834 | Half-controlled silicon-controlled rectifying system and method thereof A half-controlled silicon control rectifying system and method thereof are provided. In this case, the first detection unit detects the zero cross phase of the triphase AC in input port thereof. The second detection unit detects the voltage of the DC bus. Then the c... | 02/06/2007 |
| 7170261 | Generator with dual cycloconverter for 120/240 VAC operation A generator system has two modes of operation, such as 120 VAC and 240/120 VAC. The generator system has a permanent magnet generator with two independent sets of windings that each generate a three phase AC voltage. One three phase AC voltage is coupled to a first ... | 01/30/2007 |
| 7161816 | 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 corresponding to different levels of input voltage or output current. The power converter comprises a power stage for delivering the ele... | 01/09/2007 |
| 7151394 | Phase shifting and PWM driving circuits and methods The present invention provides an inverter controller comprising a drive circuit that generates a plurality of switch drive signals for inverter applications. In some exemplary embodiments, the drive circuit operates by reversing the command level of an error signal... | 12/19/2006 |
| 7151360 | Power supply for power factor correction and driving method thereof A power supply for power factor correction and a driving method thereof wherein a ripple current of a power factor correction circuit (PFC) can be reduced to enhance a power factor and an efficiency. In the power supply, a power factor correction circuit corrects a ... | 12/19/2006 |
| 7141894 | Apparatus for providing high quality power The system disclosed herein is primarily utilized in the 23–48 volt DC telco, data center and industrial production industry. It will effectively replace today's requirement of purchasing, installing, maintaining and replacing chemical storage batteries. The solut... | 11/28/2006 |
| 7126294 | Method and device for controlling photovoltaic inverter, and feed water device A photovoltaic inverter control method includes steps of monitoring a variation in output voltage of a solar battery by a power and voltage monitoring circuit (51) and, when the variation occurs, accelerating or decelerating an electric motor (3) to ma... | 10/24/2006 |
| 7116003 | Aircraft starter/generator electrical system with mixed power architecture A starter/generator electrical system for gas turbine powered aircraft with mixed power architecture to combine advantages of each. The mixed power architecture may be selected from constant frequency (CF), adjustable variable frequency (AVF) and narrow range variab... | 10/03/2006 |
| 7116010 | Control of small distributed energy resources A power electronics interface in a microsource controller allows efficient connection in a power system of small, low cost and reliable distributed generators such as microturbines, fuel cells and photovoltaic. Power electronics provide the control and flexibility t... | 10/03/2006 |
| 7108528 | Power supply connector A power supply connector including a spring loaded member that allows a connector to engage various power receptacles. This engagement of the connector and the power receptacle may reduce a contact resistance between the two components and heat dissipation associate... | 09/19/2006 |
| 7102331 | Generator with dual cycloconverter for 120/240 VAC operation A generator system in accordance with the invention has two modes of operation, such as 120 VAC and 240/120 VAC modes of operation. The generator system has a permanent magnet generator with two independent sets of windings that each generate a three phase AC voltag... | 09/05/2006 |
| 7092267 | Auxiliary power generation in a motor transformer A power supply generates alternating current and direct current from a constant-voltage source. A multi-phase pulse width modulation voltage source inverter is connected across the source to output multi-phase alternating current. At least one waveform generator is ... | 08/15/2006 |
| 7085114 | Current direction detection An electrical circuit is provided for detecting direction of a current flowing on a line, in particular of a bus of a test equipment. The circuit comprises a sense resistor coupled within the line. A first comparator is connected with its positive input to the line ... | 08/01/2006 |
| 7058484 | Software for configuring and delivering power Software (101 and 800) which interacts with either embedded (100) or external (400) hardware assemblies, for processes (330 to 356) such as acquiring power-related values (342), principally by the use of a connector (... | 06/06/2006 |
| 7049546 | Method and apparatus for receiving a universal input voltage in a welding power source A method and apparatus for providing a welding current is disclosed. The power source is capable of receiving any input voltage over a wide range of input voltages and includes an input rectifier that rectifies the ac input into a dc signal. A dc voltage stage conve... | 05/23/2006 |
| 7042195 | Method of controlling photovoltaic power generation system A conventional hill climbing method is not capable of tracking a maximum power when a shadow covers a part of a solar cell panel and a plurality of maximal values is thereby developed. The invention provides a photovoltaic power generation system control method that... | 05/09/2006 |
| 7016468 | X-ray tube preheat control A current feedback circuit in a dental imaging apparatus, which measures the x-ray tube current produced by the x-ray filament. During preheat, when the tube current is sensed to be appropriate for production of a constant rate of electrons, preheat is stopped, and ... | 03/21/2006 |
| 6979771 | Photovoltaic module, photovoltaic module array, photovoltaic system, and method of detecting failure of photovoltaic module The present invention provides a photovoltaic module comprising a photovoltaics and a signal generation means for generating a signal by application of a voltage, wherein the photovoltaics and the signal generating means are connected in parallel and the voltage is ... | 12/27/2005 |
