Electric power conversion systems inventions 04/06

20060087868 - Flyback converter with synchronous rectifier: Disclosed herein is a flyback converter with a synchronous rectifier which is applied to a power supply of a portable computer such as a notebook PC. The flyback converter is operated in a critical conduction mode to turn on/off a main switch at a zero crossing point of an output...

20060087869 - Dc/dc converter having an input switching stage and a plurality of output channels: A DC/DC converter having an input switching stage on the primary side and a plurality of output channels on the secondary side of the converter, each output channel having a secondary control loop and a monitoring device, the monitoring devices monitoring the operation of the secondary control loops, and a...

20060087870 - Voltage translator circuits using capacitive techniques: A voltage translator circuit and a method for operating the same. The voltage translator circuit includes (a) an input node, an output node, and a ground node; (b) a voltage divider circuit including a first and second resistors coupled in series between the input node and the ground node; (c)...

20060087871 - Programmable power supply with dual mode cross over clamps: A power supply programmable for a constant current mode and a constant voltage mode and selectively operable in either mode. Respective circuits associated with each of a constant voltage loop and a constant current loop track a control voltage of the other loop when the other loop is operating closed...

20060087872 - Power supply including multiple ac receptacles: A power supply comprises a chassis, a plurality of alternating current (AC) power receptacles formed into the chassis, and power supply circuit contained within the chassis and selectively coupled to ones of the plurality of AC power receptacles....

20060083029 - Switching power supply: A switching power supply comprises one or more switching sections which repeat ON/OFF operation, a transformer having a primary winding and a secondary winding, a synchronous rectifier section for rectifying a voltage induced in the secondary winding when an input voltage is applied to the primary winding of the transformer...

20060083030 - Power converter for fuel battery: The present invention relates to a power converter, using input voltage provided by a fuel battery and processing an electrical characteristics transformation on the input voltage to output an output voltage to loading. The power converter comprises: a multiple-phase PWM controller to output multiple PWM control signals in accordance with...

20060083031 - Power converter: A switch-type power converter comprising an FET switch operating in a variable duty cycle mode under the control of a Unitrode 3846 integrated circuit controller. Indications of excess input voltage and reverse battery connections are provided by circuits including an element which permanently changes state. A cooling fan mounted on...

20060083032 - Primary side voltage sense for ac/dc power supplies: In a method and system for providing isolated power, a flyback controller includes a transformer operable to receive a primary voltage input and generate a secondary voltage output. A switch electrically coupled in series with a primary side of the transformer receives a control signal for controlling a duty cycle...

20060083033 - Voltage generator, method of generating voltage, display device having the voltage generator and apparatus for driving the display device: A voltage generator includes a first voltage booster and a second voltage booster. The first voltage booster boosts an input voltage to generate a first boosted voltage applied to a load. The second voltage booster generates a second boosted voltage applied to the load when the first boosted voltage is...

20060083034 - Circuit for reduction of voltage stress between windings: The present invention is a high voltage power converter having primary and secondary winding sets in a single planar layer stacked in increasing voltage and arranged without the use of a conductor. Substantially no AC stress exists between winding sets....

20060083035 - Three phase rectifier circuit with virtual neutral: A rectifier circuit powers three power conversion modules using a three phase AC input without a neutral connection. First, second and third bridge rectifiers are connected to first, second and third phases of the three phase AC input and produce first, second and third rectified waveforms, respectively. A connection between...

20060083036 - Ac/dc inverter: An AC/DC inverter provided for transforming a DC power source into an AC power source, wherein the AC signal is used for driving a fluorescent filament. The inverter comprises a half-bridge switch electrically connected to the DC power source, wherein the half-bridge switch outputs the AC signal, a resonance groove...

20060083037 - Digital pwm controller with efficiency optimization as a function of pwm duty cycle: A method for optimizing the efficiency of a digital power supply having at least one switch for connecting an input voltage to an input node for driving an inductive storage element connected to an out put node tp provide a regulated output voltage, and a second switch for shunting the...

20060083038 - Device for converting high voltage alternating current (ac) to low voltage direct current (dc) and method therefor: A method and circuit for converting high voltage AC to low voltage DC using a switched power supply and rising edge conduction has an alternating current (AC) power source. A rectifier is coupled to the AC power source. A switching device is coupled to the rectifier. The switching device is...

20060083039 - Power supply system with single phase or multiple phase inverters operating in parallel: A power supply system composed by inverters (105, 110, 115) connected in parallel, applicable mainly in uninterruptible power suppliers (UPS). The parallelism provides the capacity of increasing power through the connection of new inverters to the system; and reliability, once defective inverters can be removed of the system without interrupting...

20060077694 - Pulse transition time modulation power converter: A PTTM (Pulse Transition Time Modulation) power converter includes an input terminal supplied by a PWM (Pulse Width Modulated) signal, a PWM to PTTM converter, a controlled capacitance proportional to the pulse transition time, a pulse amplifier driving a power transformer, a gate drive transformer, and synchronous rectification means. The...

20060077695 - Method for controlling a full bridge converter with a current-doubler: A method controls a Full Bridge converter with a Current-Doubler of the type including at least a first and a second half-bridges of diodes connected to respective control transistors. The method includes detecting a reference value, comparing, instant by instant, the reference value with an output voltage value of the...

20060077696 - 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....

20060077697 - Primary-side-control power converter having a switching controller using frequency hopping and voltage and current control loops: A power converter includes a switch and a controller. The switch switches electrical power in the power converter. The controller generates a switching signal to control the switch in response to a first feedback signal associated with a voltage control loop and a second feedback signal associated with a current...

20060077698 - Switching power supply device: A novel switching power supply device no more in need of a stand-by signal for turning on/off a switching element is provided. The switching power supply device is configured as having a main switching element Q1, wherein the switching power supply circuit is connected with a pulse oscillation circuit IC1...

20060077699 - Output sensor circuit for power supply: A sense circuit is provided connected to a control loop of a circuit having an output. The sense circuit receives a signal derived from the output of the circuit and provides a controlling signal to the control loop. In one embodiment, the sense circuit is connected to the output of...

20060077700 - High-efficiency adaptive dc/ac converter: A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted...

20060077701 - Electric power converter control device and process and converter comprising such a device: The control device of an electric power converter comprises a control device controlling turn-on of semi-conductor legs. The converter comprises a rectifier to supply a DC voltage on intermediate lines, a voltage filter connected on the intermediate lines, an inverter connected between said intermediate lines and an output, and a...

20060072348 - Method and apparatus for substantially reducing electrical displacement current flow between input and output circuits coupled to input and output windings of an energy transfer element: An energy transfer element with substantially reduced electrical displacement current flow between an input circuit coupled to the energy transfer element input winding and an output circuit coupled to the energy transfer element output winding. In one aspect, an energy transfer element includes an input winding, an output winding, an...

20060072349 - Forward converter with synchronous rectifier and reverse current control: A control circuit for use in a power converter having a synchronous rectifier for producing substantially direct current including a sensor for sensing a characteristic of the power converter, detection circuitry capable of using the characteristic to develop a control signal for controlling the power converter, and synchronous rectifier control...

20060072350 - Method for using a programmable operating frequency for a dc-to-dc converter for use with embedded wireless products: A method for determining the switching frequency of a DC-to-DC power supply for a portable radio transceiver (300) includes determining a first group of switching frequencies (301) and then determining the switching harmonics based on that group of switching frequencies (305). These switching harmonics are then compared to a group...

20060072351 - Inverter and inverter driving method for enabling soft start of a load: An inverter and inverter driving method for enabling slow start of a load by slowly increasing the lamp current within a range less than a predetermined maximum level thereby preventing the inverter from operating in a wrong way is disclosed. The inverter according to the present invention includes a transformer...

20060072352 - System and method for power conversion: A power converter system is provided for supplying power to an electrical load. The power converter system includes a power converter circuit adapted to perform an AC to DC power conversion and an active clamp circuit coupled to the power converter circuit for regulating DC bus voltage overshoots. The power...

20060072353 - 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 discontinuous current to an ac-ac power converter. The ac-ac power...