Electric power conversion systems inventions 01/06

20060018132 - High efficiency two stage inverter: In a two stage inverter providing power to a load, a first stage component is operable to receive a first voltage input and a first control input to generate a first voltage output, which is higher than the first voltage input. The first control input is indicative of the power...

20060018133 - Switching mode power converter having secondary side bias generating and driving circuit to provide synchronous rectification and active clamp: A switched mode power converter includes a transformer having a primary winding, a secondary winding, and a bias winding. A primary side power switch is coupled to the primary winding and is adapted to periodically apply an input voltage to the primary winding. An output filter is operatively coupled to...

20060018134 - Switching power supply device: A switching power supply includes: a first series circuit, connected to both terminals of a direct current power supply Vdc1, in which a primary winding 5a of a transformer T, a reactor L3 and a first switch Q1 are connected in series; a second series circuit, connected to both terminals...

20060018135 - Pwm controller for synchronous rectifier of flyback power converter: A synchronous rectifier PWM (SR-PWM) controller controls a MOSFET in response to the value of a secondary current and the status of a synchronous signal for both discontinuous and continuous operation mode. The secondary current is generated in a secondary circuit and is detected by two threshold-detection terminals of the...

20060018136 - Switching power supply unit and semiconductor device for switching power supply: Overload protecting operation is performed by controlling the current peak value of a switching device 1 through the use of a comparator 8, a NAND circuit 5, and so on according to variations in feedback current being input to a feedback signal control circuit 11, internally setting the overcurrent protection...

20060018137 - Method and control system employing conduction monitors for detecting unbalanced current condition of alternating current phases: A method controls and monitors a parallel array of a plurality of rectifier bridges each of which is adapted to convert a plurality of alternating current voltages of a plurality of alternating current phases to a voltage. The bridges include a plurality of segments each of which has an element....

20060018138 - Step-up/down voltage chopper: A series circuit of a first main transistor 4 and a first main diode 6 is connected across a DC input voltage source 1, and a filter capacitor 13 and a series circuit of a second main diode 12 and a second main transistor 8 are connected in parallel with...

20060018140 - Single stage pfc and power converter circuit: A power converter provides constant load power while achieving a high power factor in a single stage configuration with reduced component count and ratings. The power converter takes a rectified line input to a switching half-bridge that supplies current to a load. A series combination of shunt switch and capacitor...

20060018139 - Zero-crossing correction in sinusoidally commutated motors: An apparatus and method for controlling sinusoidal currents in inductive loads during zero-crossing to reduce distortion. The apparatus and method utilizes first and second PWM signals during a single PWM cycle to apply opposite voltage signals to obtain a net desired voltage across the inductive load. The voltage applied to...

20060013020 - Dc converter: What is provided is a direct-current converter which improves unstableness of operations owing to an error of a bottom detection circuit and fluctuations of a detection point which are caused by disturbance. The direct-current converter includes a bottom detection circuit 13 which detects a minimum voltage of a main switch...

20060013021 - Direct-current converter: Provided is a direct-current converter which can reduce power consumption at light load by reducing switching losses of a main switch. The direct-current converter is provided with: a first serial circuit which is connected to both ends of a direct current power supply Vdc1 and in which a primary winding...

20060013022 - High efficiency flyback converter: A DC-DC flyback converter that has a controlled synchronous rectifier in its secondary circuit, which is connected to the secondary winding of a main transformer. A main switch (typically a MOSFET) in the primary circuit of the converter is controlled by a first control signal that switches ON and OFF...

20060013023 - Closed-loop digital control system for a dc/dc converter: A closed-loop control system for a DC/DC converter includes a DC/DC converter that receives a first DC voltage and that generates a second DC voltage. The DC/DC converter includes first and second inductances. A control module receives the second DC voltage and generates at least one control signal to one...

20060013024 - Rectifier circuit having a power factor correction: A rectifier circuit having a power factor correction and providing a DC output is disclosed. AC power having an AC oscillation is supplied at two or more AC inputs. The rectifier circuit includes at least two power factor correction stages which are directly coupled to one or more of the...

20060013025 - Temperature monitoring of parallel-connected inverter modules: A method for operating parallel-connected inverter modules, wherein two or more inverter modules (A, B, C) are connected in parallel to feed the same load. Each inverter module has two or more output phases (u, v, w) for supplying electric power into a two or more phase load by determining...

20060013026 - Method for driving a switch in a step-up converter and a drive circuit: The invention relates to a method for provision of a drive signal for a switch which controls the current drawn by an inductive energy storage element in a power factor correction circuit in which a control signal which controls the power consumption is available. One drive cycle of the switch...

20060013027 - Power supply device, power supply module and retrieval power supply device equipped with ac and dc connection structures: A power supply device equipped with AC and DC power supply structures aims to separate an AC connection structure and a DC connection structure of the power supply device of a given size specification to replace the conventional DC and AC connection structures that are coupled on a single connection...

20060007711 - Half-bridge flyback power converter: A half-bridge flyback power converter is provided. The half-bridge flyback power converter comprises a high-side switch and a low-side switch periodically conducting an input voltage to a primary winding of a transformer. When the high-side switch and the low-side switch are switched off, energy stored in the transformer is transmitted...

20060007713 - Method and apparatus for intelligently setting dead time: Apparatus for setting dead time between ON times of two series connected switches of a power converter circuit connected across a supply potential, the apparatus comprising a circuit for monitoring a power converter circuit parameter and providing an output corresponding to the circuit parameter; a memory addressed by a signal...

20060007712 - Power conversion apparatus: A power conversion apparatus includes serially connected arms U and X, serially connected arms V and Y, serially connected arms W and Z, and a capacitor, the pairs of serially connected arms and the capacitor all connected in parallel to one another. The input-side arms U and X and the...

20060007714 - Dual mode over-current protection for switching mode power converter: A control circuit for a switched mode power converter is adapted to receive a current sense signal reflecting the output current of the power converter and a feedback signal reflecting the output voltage of the power converter. The control circuit includes a first over-current protection circuit adapted to shut off...

20060007715 - Ac/dc power converter: A dual input AC/DC power converter (10) having dual inputs (12, 14) adapted to receive both an AC and DC input and provide a selectable DC voltage output (16) and a second DC output (18). The dual input AC/DC power converter (10) comprises a power converter circuit (20) having an...

20060007716 - Power supply circuit: A power supply circuit comprises a bridge circuit that has four rectifier elements connected and produces a rectified voltage between a positive side output terminal and a negative side output terminal of the power supply circuit, two of the four rectifier elements being connected to the negative side output terminal,...

20060007718 - Power supply apparatus providing medium voltage direct current: A power supply apparatus capable of providing medium voltage direct current to provide medium voltage and low voltage direct current includes a power supply input unit, a rectification unit and a conversion unit. The power supply input unit delivers AC voltage to the rectification unit which rectifies and outputs medium...

20060007717 - Switching power supply with direct conversion off ac power source: A power supply circuit, comprising a first reverse blocking transistor coupled to an AC power line; a second reverse blocking transistor coupled to the AC power line; a first inductor provided between the first reverse blocking transistor and the AC power line and configured to store energy; a first diode...

20060007719 - Method and apparatus for controlling a discharge lamp in a backlighted display: The described DC to AC inverter efficiently controls the amount of electrical power used to drive a cold cathode fluorescent lamp (CCFL). The output is a fairly pure sine wave which is proportional to an input control voltage. The output waveform purity is ensured by driving a symmetrical rectangular waveform...

20060007720 - Compact liquid converter assembly: An electronic converter assembly including a liquid cooled heat sink member having a sink length dimension, at least one mounting surface and first and second oppositely facing lateral surfaces, the mounting surface and first and second lateral surfaces forming first and second lateral edges, respectively, the sink member also forming...

20060007721 - Architecture for power modules such as power inverters: Power converters such as power modules configured as inverters employ modularized approaches. In some aspects, semiconductor devices are thermally coupled directly to thermally conductive substrates without intervening dielectric or insulative structures. Additionally, or alternatively, semiconductor devices are thermally coupled to thermally conductive substrates with relatively large surface areas before heat...

20060002154 - Power conversion device with efficient output current sensing: A power conversion device contains an electronic circuit for sensing an output current characteristic of an output drive device. The characteristic of the current through the output drive device is sensed and communicated to a switching device for controlling a sensing current. The switching device is coupled to the output...

20060002155 - 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 electrical power from the power source to the load,...

20060002156 - Dc converter circuit with overshoot protection: A DC-DC converter comprises an input circuit that stores inductive energy that includes a first switch that releases the stored inductive energy. A transformer includes a primary winding that communicates with the input circuit and a secondary winding. An output circuit communicates with the secondary winding and that includes first...

20060002157 - Frequency control and power balancing in disturbed power inverter system and method thereof: A system and method are disclosed for controlling DC to AC power converters (inverters) that are operated as voltage sources and are paralleled on the AC side. This method allows for controlling frequency while sharing real power. The disclosed method requires no communication between inverters for proper load sharing, thus...

20060002158 - Method and apparatus for dissipative clamping of an electrical circuit: Dissipative clamping apparatuses and methods for electrical circuits. In one aspect of the invention, In one aspect of the invention, a method includes switching a power supply input on an energy transfer element, regulating a power supply output by switching the power supply input on the energy transfer element, clamping...

20060002159 - Circuit and method for implementing a multi-function pin on a pwm controller chip in a voltage converter: For a PWM controller chip in a voltage converter to switch a pair of high side and low side switches connected with a phase node therebetween, a circuit comprises a sense resistor connected between a multi-function pin on the PWM controller chip and the phase node, and an enable arrangement,...

20060002160 - Secondary side synchronous rectifier driver integrated circuits with adaptive turn-off for transformer coupled power supplies: Secondary side synchronous rectifier driver circuits with adaptive turn-off of each of a pair of synchronous rectifiers in the secondary circuit of isolated and non-isolated transformer coupled power supplies having a continuous inductor current. When a respective turnoff signal is received from the controller, each synchronous rectifier driver senses the...

20060002161 - Temperature and voltage controlled integrated circuit processes: The present application relates to apparatus and methods for burn-in and other diagnostics performed on integrated circuits. In one embodiment, the invention includes a plurality of sockets, each to hold an integrated circuit (IC), and coupling power to the respective IC from a remote power supply, a plurality of voltage...

20060002162 - Single inductor capacitor charger: A capacitor charger comprises an inductor connected between an input voltage and an output capacitor, a taper drawn from the inductor to separate the inductor to two segments, and a switch connected to the taper, and switches the switch to produce a current to charge the output capacitor to produce...