Electric power conversion systems inventions 10/06

20060239038 - Dc-ac converter and method of supplying ac power: A dc-ac converter capable of supplying a finely regulated ac drive voltage to a load is provided. For this purpose, the converter includes, in a primary winding of a transformer, a full-bridge or half-bridge type semiconductor switch circuit whose switches can be controlled by pulse-width modulation. Transformer has a secondary...

20060239040 - Dual-mode switching dc-to-dc converter: A transformer has a primary winding connected to a pair of DC input terminals via an active switch, and a secondary winding connected to a pair of DC output terminals via a first rectifying and smoothing circuit. The active switch is driven constantly under normal load, and at intervals under...

20060239039 - Switching power supply circuit: A switching power supply circuit having a power factor improving function that makes it possible to improve power conversion efficiency and reduce size and weight of the circuit. A complex resonant converter is formed by at least combining a current resonant converter of a half-bridge coupling system on a primary...

20060239041 - Switching converter: A switching converter in which an input voltage can be switched by means of at least one controlled switch to at least one primary winding of a transformer, with a control circuit for controlling the switch, to which control circuit a regulating signal in the sense of regulating at least...

20060239042 - 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 transformer. The inverter is capable of deliberately regulating its ac...

20060239043 - Electric power transmission device and electric power transmission method: In an electric power transmission device in which a primary side power transmission coil (L1) and a secondary side power receiving coil (L2) are magnetically coupled, and electric power is transmitted from the primary side power transmission coil (L1) to the secondary side power receiving coil (L2) via a non-contact...

20060239044 - Pulse width modulation (pwm) controlling module and method for adjusting a pwm signal thereof: A pulse width modulation (PWM) controlling module, includes: a PWM controller, a load detector, and an adjusting module. The PWM controller generates a PWM signal that is utilized for controlling a supply voltage applied to an electronic system. The load detector, coupled to the PWM controller, detects a load of...

20060239045 - Sequential soft-start circuit for multiple circuit channels: A first to an n-th current sources supply a first to an n-th charging currents, respectively. A sequence control circuit allows an x-th charging current of the first to the n-th charging currents to charge a capacitor for generating an x-th soft-start signal. The variable x is an integer and...

20060239046 - Active current sharing multiphase dc-dc converter: A converter module for use as a phase in a multiphase DC-DC converter having a data bus for transferring current-sharing information is provided. The converter module comprises a power stage and a controller. The power stage comprises an input for receiving an input voltage and an output for providing an...

20060239047 - Inverter apparatus: A CPU calculates, based on a frequency command value for driving a motor and on a state quantity of the motor, an output-voltage command value in which only the phase advances while amplitude is constant in each calculation period, without reducing the calculation period. An ASIC reflects the output-voltage command...

20060239048 - Circuit and method for reducing the size and cost of switch-mode power supplies: An improved circuit and method for decreasing the size and cost of switch mode power supplies is disclosed. In one illustrative example, a feedback circuit for a switch mode power supply is disclosed that includes two error amplifiers. The input of a first error amplifier is coupled to a voltage...

20060239049 - Circuit arrangement: In an up-converter supplied by the mains supply and operating in the critical mode, the on-time of the switching element (2) is modulated so that it is increased in the vicinity of the zero crossings of the mains supply voltage. As a result the THD is lowered....

20060239050 - Inverter type motor drive unit: An inverter type drive unit for feeding AC electric power of variable parameters to an electric motor comprises an electronic control section (40), a power converting and an output section comprising one or more identical power modules (11a-c), each forming a complete 3-phase output stage and arranged in a side-by-side...

20060239052 - Distributed relocatable voltage regulator: An apparatus comprising an integrated circuit having (i) a number of regions each pre-diffused and configured to be metal-programmed and (ii) a plurality of pins configured to connect the integrated circuit to a socket. A logic portion may be implemented on the integrated circuit (i) configured to implement integrated circuit...

20060239051 - On-die offset reference circuit block: A method and apparatus for an integrated circuit having a offset reference circuit block to receive an external voltage reference and output an offset reference voltage are described herein....

20060233000 - Power converter motor drive btb system and system linking inverter system: The invention provides a bidirectional power converter, that can be connected directly to an AC system without interposing a transformer, that is small in size, light in weight, inexpensive to manufacture, and capable of regenerative operation, and also provides a motor drive equipped with such a power converter and a...

20060233001 - Integrated power supply module for filter: The present invention is a socket of card reader (I) for memory card with connecting terminals following specification of USB, which is a socket of card reader utilizing 4 pin USB (Universal Serial Bus) architecture for reading flash memory card with USB-compatible specification. The said socket of card reader is...

20060227577 - 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-voltage switching, an insulating high-frequency transformer which transmits the converted power,...

20060227576 - Switching power supply circuit: The present invention provides a voltage resonant converter that achieves ZVS over the entire allowable load range. A switching power supply circuit includes a class-E resonant converter as its primary-side switching converter that is supplied with a DC input voltage arising from the rectification and smoothing of a commercial AC...

20060227578 - Power converter system and method: A power converter system for supplying an output voltage is provided. The power converter system is adapted to operate in a normal mode and a fault mode. The system comprises a plurality of bridges and a plurality of transformers. The system further comprises a plurality of dc link capacitors, each...

20060227579 - Power supply arrangement: A power supply arrangement (1) has a first input for connecting to a first power source, at least one second input for connecting to at least one second power source and an output for connecting to a load. The arrangement (1) comprises at least two paralleled inverter modules (11, 12,...

20060227580 - Programmable power supply: A progammable power supply for providing a regulated DC output power is disclosed. The power supply provides the output power to any one of a plurality of electronic devices adapted for receiving the output power at an operational voltage or an operational current. The power supply receives a programming signal...

20060227581 - Power supply and related systems and methods: A power supply includes a power source having first and second terminals. A circuit is coupled to the source and is operable to maintain a first quantity between the terminals within a predetermined range of values until a second quantity between the terminals has a predetermined value. Such a power...

20060227582 - Rectifier for reducing current harmonics from unbalanced source: A rectifier includes a transformer, a rectifying bridge, a link capacitor, and at least a first resonance loop. The transformer is operable to receive three phase input signals having a source frequency and generate a plurality of transformer phase signals. The rectifying bridge has a number of stages corresponding to...

20060227583 - Electric power converter: By reduction in loss and noise of a three-phase reactor on the AC side of an electric power converter, compactness and reduction in weight of the reactor are realized, and countermeasures for heat and noise are reduced, and a specific frequency component is reduced, thus cost reduction and conversion efficiency...

20060227584 - Zero-voltage-switching electric converter: The present zero-voltage-switching electric converter has a power source, an inverter electrically connected to the power source and a resonant load electrically connected to the power source and the inverter. The resonant load includes a first capacitor, a first inductor connected in series to the first capacitor and a load...

20060221646 - System and method for controlling variations of switching frequency: System and method for providing frequency control to a power converter. The system includes a pseudorandom signal generator configured to generate a digital signal. The digital signal is associated with at least an N-bit datum, and N is a positive integer. Additionally, the system includes a digital-to-analog converter configured to...

20060221647 - Converter having a plurality of channels: A converter having a plurality of channels comprises a transformer having a primary winding and at least one secondary winding. First switch means connected to the primary winding serve to chop a substantially DC voltage in compliance with a first squarewave periodic signal in order to form an input signal,...

20060221648 - Modified high-efficiency phase shift modulation method: Disclosed is a high-efficiency phase shift modulation method suitable for use in a traditional DC/AC single-phase full-bridge inverter. In this method, phase-shifted signal timing is used to modulate a duty cycle so that a power transistor is operated in a zero voltage switching state. As such, noises and switching loss...

20060221649 - Multi-output type dc/dc converter with a constant on time interval in a steady state: In a multi-output type DC/DC converter, a controller controls, in accordance with first and second output voltages, turning on/off of a switch circuit and selection in an output selection circuit. The controller controls an ON time interval in each time slot of the switch circuit so as to always constant...

20060221650 - Dc-dc converter: A DC-DC converter is provided with a control circuit 6 which comprises a drive signal generator 11 for producing on-off signals to a control terminal of a MOS-FET 3 in synchronization with pulse signals VOSC from an oscillator 10; an intermittent controller 12 for producing a control signal VC1 to...

20060221651 - Solid state switching circuit: A solid state switching circuit utilizes a transformer in series with the circuit's switching device by which energy initially stored in the primary of the transformer is recovered in resonant circuitry connected to the secondary of the transformer for transfer of the energy to the load when the switching device...

20060221652 - Dc voltage converter with soft switching: The present invention relates to a DC/DC converter of half-bridge type with soft switching comprising a transformer. The primary of the converter is of the type with half-bridge arrangement and is linked to an input voltage source by way of two switches and the secondary is of half-wave type and...

20060221653 - Multilevel converter based intelligent universal transformer: A multilevel converter-based, intelligent, universal transformer includes back-to-back, interconnected, multi-level converters coupled to a switched inverter circuit via a high-frequency transformer. The input of the universal transformer can be coupled to a high-voltage distribution system and the output of the universal transformer can be coupled to low-voltage applications. The universal...

20060221654 - Switching device and related operating method: A switching device and a method of operating a switching power element are disclosed for generating a train of drive pulses (D1 to D32) in a basic pattern for a repetition cycle time (T to TF) having leading time intervals (Th1 to Th3, Th1′ to Th3′), associated with leading edges...

20060221655 - Filter circuit and power supply unit: The present invention provides a filter circuit realizing reduction in the number of magnetic cores on a circuit board and a space occupied by the magnetic cores, and a power supply unit using the filter circuit. A filter circuit includes a first filter part and a second filter part which...

20060221656 - Electric power converter: By reduction in loss and noise of a three-phase reactor on the AC side of an electric power converter, compactness and reduction in weight of the reactor are realized, and countermeasures for heat and noise are reduced, and a specific frequency component is reduced, thus cost reduction and conversion efficiency...

20060221657 - Ac-dc converting device, and electrical apparatus provided with ac-dc converting function: An AC adaptor has a switching regulator for converting alternate current to direct current. Filters are provided to filter conducted noise, and a filter switcher switches to the filter to be used in the AC adaptor. A detector detects power consumption state of an electrical apparatus. A state-filter relations storage...