Electric power conversion systems inventions 08/06

20060193152 - Current-mode resonant inverter circuit: A high conversion efficiency inverter circuit by providing the current-mode resonant type efficient in using a power source. A current-mode resonant inverter circuit comprises a step-up transformer; the secondary winding side of the step-up transformer is composed of a resonant circuit between leakage inductance of the step-up transformer secondary winding...

20060193153 - Power supply: A power supply, including a step-up converter, a resonant converter, and control unit. The step-up converter is connected to the resonant converter; the step-up converter and the resonant converter are each connected to the primary control unit....

20060193154 - Power supply device: A power supply device includes two input ports, two output ports, a transformer having primary and secondary windings, switching means, and a controller. The switching means includes a switching element connected in series with the primary winding, and a capacitor. The controller switches the switching element to energize the transformer...

20060193155 - Dc converter: A DC converter has a transformer with loosely coupled primary and secondary windings, a main switch connected in series with the primary winding of the transformer, and a series circuit connected to ends of one of the primary winding and main switch. The series circuit includes a clamp capacitor and...

20060193156 - Charge pump dc/dc converter circuit: A charge pump DC/DC converter circuit of the present invention includes: a monitor circuit that detects a potential difference between terminals of a semiconductor switch that turns on during a first period, so as to output a determining signal corresponding to the potential difference; and each of drive circuits that...

20060193157 - Thermal compensation method for cmos digital-integrated circuits using temperature-adaptive digital dc/dc converter: A device and method of enhancing the reliability and performance of integrated circuits, e.g., complementary metal-oxide semiconductor integrated circuits (“IC”) is described. The device is an IC (e.g., digital, analog, and mixed-signal circuits) comprising a digital voltage control system (“VCS”) having a temperature-adaptive digital DC-to-DC voltage converter. In one embodiment,...

20060193158 - Inverter type ac generator: An inverter type AC generator includes an inverter circuit converting a DC output into AC output of a predetermined frequency and supplying the AC output to a load via a load line in order to improve the quality of an AC output waveform at least in parallel operations. The inverter...

20060187683 - Method of detecting phase-loss state of three-phase power supply: The disclosure relates to a method of detecting the phase-loss state of the three-phase power supply. When the phase-loss condition occurs in the input three-phase power supply of the power converter, it is determined whether the three-phase power source is in the phase-loss state through the characteristic of the frequency...

20060187684 - 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 first switch coupled to one of...

20060187685 - Power supply device: A power supply device has first and second terminals, a transformer, a switching element, and auxiliary power supply means. The first and second terminals receive input power having an input voltage. The transformer has a primary winding and a secondary winding. The primary winding has a pair of winding terminals....

20060187686 - Llc series resonant converter and the driving method for the synchronous rectification power switches thereof: An LLC series resonant converter and a driving method for the synchronous rectification power switches thereof are provided. The LLC series resonant converter includes a bridge circuit, a resonant network, a transformer, a rectification circuit, and a frequency adjustment controller. The bridge circuit includes at least one pair of power...

20060187687 - Switching power supply circuit: An abnormal operation in which a current flows through a switching device before the end of an off period of the switching device at medium load is eliminated by setting the coupling coefficient of an isolated converter transformer to about 0.7 or lower. A primary side parallel resonance frequency and...

20060187688 - Switching power supply apparatus: A switching power source apparatus can reduce the size of a transformer and realize the zero-voltage switching of a switch. The apparatus is compact, highly efficient, and low in noise. The apparatus has a series circuit connected to each end of a DC power source (Vdc1) and including a primary...

20060187689 - Parallel powering of portable electrical devices: A portable electrical device may include a DC to DC converter coupled to a common node, a load coupled to the common node, and a controller configured to control the DC to DC converter. The DC to DC converter may be configured to provide a charging current to a rechargeable...

20060187691 - 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 generators controlling the first and second phase...

20060187690 - Parallel operating system of dc-ac converters and controller ic therefor: A multiplicity of synchronized inverters for driving a multiplicity of loads such as CCFLs that require high ac voltages are arranged in close proximity of the respective loads and controlled in phase. A frequency determination capacitor and a frequency determination resistor are connected to one of the inverters to generate...

20060187692 - Output voltage control of a synchronous rectifier: The trend towards more digital signal processing in mains-powered devices causes an increasing variety of supply voltages at ever decreasing levels and at higher currents. At present, the secondary side architecture provides a separate ac-dc conversion and dc-dc down-conversion stages in order to obtain stabilized voltages at those low levels....

20060187693 - Power factor correction apparatus: A power factor correction (PFC) apparatus is disclosed. The apparatus comprises a DC rectification circuit and a PFC auxiliary circuit. In this apparatus, the PFC auxiliary circuit is coupled between the input and output terminals of the DC rectification circuit. According, not only can the conduction time be increased, but...

20060187694 - Device and method for controlling a converter and electric converter comprising one such device: The control device of an electric power converter comprises a control device controlling turn-on of semi-conductor legs. The converter comprises DC voltage power supply lines on three levels with two filtering capacitors. The control device supplies modulation signals of control signals of said legs. The control device comprises a regulating...

20060187695 - Arrangement and method for cooling a power semiconductor: In an arrangement and a method for cooling a power semiconductor in which at least one power semiconductor is electrically and thermally conductively connected to at least one passive electric component. Further, a cooling element is thermally conductively connected to at least a part of the surface of the passive...

20060187696 - Cradle for receiving an adapter: A cradle casing has a DC/DC adapter to receive DC power from a DC power source and generate a first DC power signal. A sleeve accepts an AC/DC adapter, and guides movement of the AC/DC adapter when the AC/DC adapter is inserted into the cradle casing. The AC/DC adapter is...

20060181904 - Driving apparatus of display device and dc-dc converter: A DC-DC converter is provided, which includes a transformer including a primary coil and a secondary coil, a boost converter connected to the primary coil of the transformer and generating a first voltage, and a flyback converter connected to the secondary coil of the transformer and generating a second voltage....

20060181905 - Radiation tolerant electrical component with non-radiation hardened fet: A radiation tolerant electrical component is provided without a radiation hardened material FET. A p-channel MOSFET provides switching capabilities in radiated environments because its gate voltage starts at a negative value and becomes more negative with exposure to radiation. Therefore, the gate is still controllable when exposed to radiation....

20060181906 - Alternated duty cycle control method for half-bridge dc-dc converter: Apparatus, methods system and devices for using alternated duty cycle control to achieve soft-switching for at least one switch of the two half-bridge switches. When soft-switching can be only achieved for one switch, alternated duty cycle control alternates the soft-switching between the two switches so that each switch is soft-switched...

20060181907 - Method and inverter for supplying alternating current to a network: A method for supplying alternating current to a network (NET), according to which a direct current is converted to an alternating current with a line frequency, with the aid of an inverter (WER) and the output of the inverter is connected to the network. The terminal voltage (u(t)) is measured...

20060176714 - Switching power supply circuit: A voltage resonant converter is provided with a secondary side parallel resonant circuit, and an isolated converter transformer PIT is set in a state of loose coupling at a coupling coefficient k=about 0.7 or lower. Thus a steep unimodal characteristic is obtained as a constant-voltage control characteristic to reduce a...

20060176715 - Switching power supply device: A switching power supply apparatus includes a first inductor that is serially connected to a primary winding of a transformer, and a second inductor that is arranged so as to apply a voltage of a capacitor with sine waves obtained by rectifying an AC input voltage for an on-period of...

20060176716 - Method and apparatus for maintaining a constant load current with line voltage in a switch mode power supply: A power supply including a regulation circuit that maintains an approximately constant load current with line voltage. An example circuit includes a switch including first, second and third terminals. The first terminal is coupled or decoupled to the second terminal in response to a control signal received at the third...

20060176717 - Analog control asic apparatus for high voltage power supply in image forming apparatus and method for controlling high voltage power supply: An analog control application specific integrated circuit (ASIC) apparatus for a high voltage power supply (HVPS) in an image for apparatus, and a method for controlling the HVPS are provided. The HVPS includes a transformer transforming an AC signal to a high voltage signal and a voltage doubler outputting a...

20060176718 - Charge pump circuit and power supply circuit: A charge pump circuit is provided for generating a voltage (1+1/n) times as high as a supply voltage. The charge pump circuit eliminates the need for diodes for preventing a current from flowing back from a high potential side of capacitors to prevent a reduction in the voltage due to...

20060176719 - Soft switching dc-dc converter: The present invention relates to a soft switching DC-DC converter. A soft switching DC-DC converter comprises a first switching element having a first terminal connected to an input side and having a control terminal for controlling a main electric current; a first diode having a first terminal connected to a...

20060176720 - Rotating rectifier with strap and diode assembly: The present invention is a rectifier assembly having three phase straps with two diodes mounted to each phase strap. The rectifier assembly also includes a first support and a second support, which are received within a housing. The phase straps are assembled together with the first and second supports. The...

20060171174 - Data communication over a power line: Data signals are communicated between a power line and a computer, wherein the power line provides power to the computer via a distribution transformer and the computer is in communication with a wireless communication path. A first data signal is communicated with the power line. A conversion is made between...

20060171175 - Adaptive multi-level threshold system and method for power converter protection: System and method for protecting a power converter. The system includes a compensation system configured to receive an input signal and generate a control signal, a cycle threshold generator configured to receive the control signal and generate a cycle threshold, and a comparator configured to receive the cycle threshold and...

20060171176 - Power source: A flyback power source, comprising a transformer (T1) provided with a primary winding (N1) and at least one secondary winding (N2), a semiconductor switch (V1) in the primary circuit for connecting a supply voltage (u1) to the primary winding, said secondary circuit being provided with a filter capacitor arrangement, a...

20060171177 - Direct current converting a apparatus: A DC converter alternately turns on and off a main switch Q1 connected in series with a primary winding P1 of a transformer T and a sub-switch Q2 contained in a series circuit connected to each end of the primary winding P1 of the transformer T or to each end...

20060171178 - Compensated droop method for paralleling of power supplies (c-droop method): A power supply has multiple power supply modules connected in parallel. Each power supply module has a power conversion circuit having an input coupled for receiving an input voltage. A resistor is serially coupled in an output of the power conversion circuit. A current limit amplifier has first and second...

20060171179 - Low audible noise power supply method and controller therefor: A power controller forms drive pulses that reduces audible noise under light load conditions....

20060171180 - Switching-mode power supply having a synchronous rectifier: A DC-to-DC converter incorporates a transformer having a primary winding connected to a pair of DC input terminals via an active switch, which turns on and off under the control of a feedback circuit, and a secondary winding connected to a pair of DC output terminals via a synchronous rectifier...

20060171181 - Sinewave inverter using hybrid regulator: A sinewave inverter for converting unstable DC voltage from a variable source such as batteries, fuel cells, wind mills and the like into a distortionless sinusoidal AC voltage of constant amplitude and constant frequency is provided. This pure sinewave inverter with line and load regulated voltage is obtained by using...

20060171182 - Solar array inverter with maximum power tracking: An inverter for use in connecting a DC power source to the utility grid includes a single DC-DC conversion stage, maximum (source) power tracking, and current control based on feed-forward compensation as a function of an input power commanding voltage, rectified utility line voltage, and either a scaled and squared...