Electric power conversion systems inventions 06/06

20060139965 - Power supply device and single photo-coupler control circuit thereof: A power supply device and a single photo-coupler control circuit thereof are provided. The power supply device includes a single photo-coupler control circuit, a main converter and an auxiliary converter. The main converter connects to an output load. The auxiliary converter connects in parallel with the main converter. The single...

20060139966 - Tft display with low loss construction of power supply: This present invention relates to a TFT display with low loss construction of power supply to be used in a monitor. The invention includes two independent transformer rectifier circuits, thus when the monitor is in its power-saving mode, it requires only one transformer rectifier circuit to provide the required voltage...

20060139968 - Dc conversion apparatus: A DC conversion apparatus includes a switch converting a DC voltage of a DC power source to a high-frequency voltage by being turned ON/OFF via a primary winding of a transformer, a series circuit of a switch and a clamp capacitor being connected to both ends of the primary winding,...

20060139969 - Dc conversion apparatus: A DC conversion apparatus includes a switch that converts a DC voltage of a DC power source to a high-frequency voltage by being turned ON/OFF via a primary winding of a transformer, a synchronous rectifying circuit that performs synchronous rectification of a high-frequency voltage generated at a secondary winding, a...

20060139967 - Synchronous rectifier drive circuit for low output voltage active clamp forward converter: A drive circuit for a synchronous rectifier has a transformer having a main secondary winding and an auxiliary secondary winding. A first switch and a second switch each have a pair of terminals, a terminal of the first switch being connected to the first end of the main winding, a...

20060139970 - Method of operating a resonant push-pull converter in an above resonant frequency mode: A method is disclosed for operating a push-pull converter in an above resonant frequency operating mode, where the above resonant frequency operating mode produces a switching frequency that is higher than the natural operating resonant frequency of the converter circuit. This in turn means that the resonant period is longer...

20060139971 - Noise suppressor: A noise suppressor capable of achieving reduction in size and weight of devices is provided. The noise suppressor is a circuit for suppressing normal mode noise which is transmitted through a first current-carrying wire and a second current-carrying wire, and causes a potential difference between the current-carrying wires, and the...

20060139972 - Device and method for control of an electric power converter 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 DC voltage supply lines, an inverter connected between said lines and outputs. The control device comprises a processing unit to supply modulation signals of control signals of said inverter legs....

20060139973 - Semiconductor device: A semiconductor device has a semiconductor element connected to an input/output terminal and a reference voltage terminal, a first rectifier element connected between the input/output terminal and the reference voltage terminal, which performs rectifier operation to prevent a voltage of the input/output terminal from becoming higher than a voltage of...

20060139975 - Backup power supply with parallel ac power source and dc power source: Provided is a backup power supply comprising at least one DC/DC power electrically connected to a DC power source for taking DC current therefrom prior to providing regulated DC current, at least one AC/DC power electrically connected to an AC power source for taking AC current therefrom prior to providing...

20060139976 - Common sharing bus control circuit for signal regulation modules: The control circuit is for a current sharing bus integrated in signal regulator modules, particularly voltage regulator modules (VRM), the circuit being of the Average Program (AP) type. The circuit includes a voltage regulator module, including an operational transconductance amplifier, a first current generator, connected to a first input terminal...

20060139974 - Power device: The invention relates to a power device (100), comprising at least a first and a second DC-DC-converter (110, 120, 130), each converter having respective input and output voltages, and respective input and output currents, each converter (110, 120, 130) converting an input DC-voltage level to an output DC-voltage level, each...

20060139977 - High voltage pulse generator: A high voltage pulse generator utilizes an even number of Marx cells using L-C inversion topology. Each Marx cell is associated with an individual inverter transformer having a primary winding connected to the output of an ac power supply such as a series resonant inverter. The secondary of each inverter...

20060139978 - Switching power supply with clamping circuit: A switching power supply with clamping circuit includes a clamping circuit between a slave output terminal and a master output terminal thereof, to prevent voltage drift at the slave output terminal. The clamping circuit includes a switching circuit connected between the slave output terminal and the master output terminal, and...

20060139979 - System and method for controlling bidirectional three-phase dc/dc converter: Disclosed are an apparatus and method for controlling a Direct Current (DC)/DC converter which controls energy flow between a first DC source and a second DC source to eliminate a high-frequency resonance. The apparatus for controlling the DC/DC converter includes a voltage controller, one or more subtractors, one or more...

20060133115 - Adaptive blanking of transformer primary-side feedback winding signals: A method of regulating a power converter using a transformer primary-side feedback winding to provide a feedback signal. The feedback signal is selectively blanked based on a signal indicative of a duty cycle of a switch controlling the converter. The converter is regulated based on the selectively blanked feedback signal....

20060133116 - Synchronous rectifier gate drive shutdown circuit: A power converter is disclosed. According to various embodiments, the power converter includes a transformer, a bridge input circuit, a self-driven synchronous rectifier circuit, a gate drive circuit, and a gate drive shutdown circuit. The transformer includes a primary winding connected to the bridge input circuit, a first secondary winding,...

20060133117 - Simple switched-mode power supply with current and voltage limitation: This invention relates to a primary-controlled switched-mode power supply of the type of a free-running flyback converter, which comprises a transformer with a primary-side winding, a secondary-side winding and at least one auxiliary winding. The switched-mode power supply comprises a primary-side switch, which is connected to the primary-side winding, in...

20060133118 - Multiple-sampling circuit for measuring reflected voltage and discharge time of a transformer: A multiple-sampling circuit is proposed for measuring a voltage signal and a discharge time of a transformer. Sampling signals are used for generating hold voltages by alternately sampling the reflected voltage from the transformer. A buffer amplifier generates a buffer voltage from the higher voltage of hold voltages. A sampling...

20060133119 - Electric power unit: There is no period of time when any of switching elements and switching elements is turned on in a certain switching frequency, any one switching element is turned on in a period of time except for a dead time period for the zero voltage switching, the switching elements and the...

20060133120 - Three-phase ac-to-dc-to-ac converter: A non-outage power supply system comprises three-phase ac input terminals and three-phase ac output terminals, between which there are sequentially connected a three-phase ac-to-dc converter circuit, a capacitor, and a three-phase dc-to-ac converter circuit. A bypass switch is connected between a preselected one of the three-phase ac input terminals and...

20060133121 - Control system for a voltage converter: The invention relates to a control system for a voltage converter, said control system comprising:—a set of switches (T1-T2-T3-T4) intended to be connected via output terminals (N1-N2-N3) to a first type of voltage converter or to a second type of voltage converter,—detection means (DET) to generate a detection signal (DS)...

20060126363 - Power system with redundant power supply apparatus: A power system (100) includes power conversion apparatus (110) coupled to load apparatus (120) having at least one load circuit (122,124). The power conversion apparatus includes: a first input (102) for receiving an AC signal; a second input (104) for receiving a DC signal; and a first number of power...

20060126364 - Switching power supply circuit: A switching power supply circuit which can achieve enhancement of the power conversion efficiency is disclosed. In a composite resonance converter wherein a current resonance type converter constructed on the primary side and a primary side partial voltage resonance circuit are combined, a primary side DC input rectification circuit is...

20060126365 - Method for controlling power supply in a buffered modulation mode: A method for controlling power supply in a buffered modulation mode is to control an inverter to perform energy transformation so that the inverter and a load in the rear end can function in a reliable characteristic range and prevent the load from aging too quickly. The method includes entering...

20060126366 - Method and apparatus for output voltage regulation in primary control switched mode power supplies: A voltage sense circuit and power supply regulation technique. In one aspect, a voltage sense circuit utilized in a power supply regulator includes a transformer including a sense winding and an output winding. A first diode is coupled to the sense winding, a first resistor is coupled to the first...

20060126367 - Power supply adaptive feedforward control circuit: There is provided by this invention a system for supply power utilizing a power supply having an adaptive feedforward circuit that uses a gating circuit to periodically apply a feedback signal to an integrator circuit in order to develop an optimal level of a scaled feedforward signal that is used...

20060126368 - Switching power supply with capacitor input for a wide range of ac input voltages: A switching power supply includes a bridge rectifier, a switching device, and a controller. The bridge rectifier is operatively coupled to an alternating current (ac) signal, and outputs a rectified signal. The switching device is electrically connected in parallel with the bridge rectifier. The controller is responsive to the rectified...

20060114696 - System linking apparatus for generated electric power: A system linking apparatus for generated electric power which may be made smaller and more efficient. The system linking apparatus is intended for connecting an electric power system to an output of a power generator through a linking inverter (PWM inverter). The system linking apparatus includes a magnetic energy regenerating...

20060114697 - Switching power supply circuit: In a switching power supply circuit in which, in order to both provide high power conversion efficiency of a complex resonant converter having a synchronous rectifier circuit and reduce a circuit scale and cost by simplifying the circuit, a synchronous rectifier circuit of a winding voltage detection system is provided...

20060114698 - Switching power supply unit: A first side circuit connected to a primary coil of a transformer includes a main switching element driving the primary coil, and a control circuit which detects an output voltage to feedback and drives and controls the main switching element so as to keep constant the output voltage by acquiring...

20060114699 - Switching power supply device: If an intermittent oscillation pulse in a case in which the power consumption in the standby state is reduced at the maximum is supplied to a connection point from an output port of a microcomputer through a capacitor and a resistor, a DC component of the intermittent oscillation pulse is...

20060114700 - Method for controlling the transient response of a power converter powering a load, transient response controller and power converter: A method for controlling the transient response of a power converter powering a load, said power converter comprising a power switch, a synchronous rectifier and a capacitor coupled between an input and an output of the power converter, said method comprising the step of—disabling said synchronous rectifier in response to...

20060114701 - Dc-dc converter for a display: A DC-DC converter for a display. The DC-DC converter comprises a negative voltage generator, a level sifter and a DC-DC sub-converter. The negative generator generates a negative voltage. The level shifter, coupled to the negative voltage generator, generates complementary switch control signals. The DC-DC sub-converter coupled to the level shifter...

20060114703 - Frequency feedforward for constant light output in backlight inverters: In a method and system for an improved inverter providing power to a load, the inverter receives a direct current (DC) input. A plurality of switches included in the inverter are controlled by a plurality of control signals to generate an alternating current (AC) output in response to the DC...

20060114702 - Voltage conversion device and computer-readable recording medium with program recorded thereon for computer to execute control of voltage conversion by voltage conversion device: A control device calculates a voltage command value of a voltage step-up converter based on a torque command value and a motor revolution number and calculates the on-duty of an NPN transistor based on the calculated voltage command value and a DC voltage from a voltage sensor. Under the conditions...

20060114704 - Insulating arrangement for dc/ac inverter: A DC-to-AC inverter includes an inverter housing, a power conversion module, and an interference insulating arrangement which includes a DC inlet and an insulating member. The inverter housing has a receiving compartment defining an interference zone within which electromagnetic interference occurs, and a free zone free of electromagnetic interference. The...