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| Number | Title | Issue Date |
| 8089790 | Power supply input device A power supply input device including a first resistance of a discharge resistance conversion unit connected in parallel to a discharge resistance unit; and a switching unit of the discharge resistance conversion unit connected to the first resistance and performing... | 01/03/2012 |
| 8009450 | Method and apparatus for phase current balance in active converter with unbalanced AC line voltage source Active power converters and methods are presented for converting input electrical power to output electrical power with converter switching control in which the individual phase voltage command values are compensated according to phase line voltage imbalances to com... | 08/30/2011 |
| 7848127 | Direct-current power supply apparatus with improved power factor First and second rectification circuits are connected to a commercial AC power supply by a reactor. A load is connected between the output terminal on the positive side of the first rectification circuit and the output terminal on the negative side of the second rec... | 12/07/2010 |
| 7791913 | Secondary side switch-off timing adjusting method, apparatus, and system using same The present invention discloses a secondary side switch-off timing adjusting method for a switching power conversion, comprising: detecting the falling edge of the voltage across a secondary side transistor according to a first reference voltage to generate a first ... | 09/07/2010 |
| 7733677 | Output power switching vector scaling system and method A power converter control system and method is provided to maximize the power output of the converter where an overload condition is present. A controller calculates a command voltage and command power factor. The command voltage and command power factor are used to... | 06/08/2010 |
| 7561451 | Power converter apparatus and methods using a phase reference derived from a DC bus voltage In a power converter apparatus, such as an uninterruptible power supply, a phase reference signal is generated responsive to a DC voltage on a DC bus. A magnitude reference signal may be generated responsive to a phase current of an AC bus and/or the DC voltage on t... | 07/14/2009 |
| 7542315 | Active rectifier A voltage signal rectifier produces a rectified voltage signal from an input offset voltage signal. The voltage signal rectifier includes input offset, output, and reference nodes, two actively controlled current regulation elements (ACCREs), and two controllers. Th... | 06/02/2009 |
| 7495940 | Method and device for producing rectifier gating signals using a peak detector A device that includes an active rectifier (14) having control gates controllable to produce an output voltage on a DC bus (20), a gate control circuit (16) for producing gate control signals for controlling the active rectifier control gates, a... | 02/24/2009 |
| 7375989 | AC/DC converter and method of modulation thereof A method and apparatus for modulating a discontinuous conduction mode (DCM) Boost Rectifier having a switchable booster section is disclosed. A modulation signal is defined according to the equation, TON(φ)=f1(φ)+f2(φ)+f3(φ). Here, φ defines a phase ... | 05/20/2008 |
| 7355867 | Power supply for an electric meter having a high-voltage regulator that limits the voltage applied to certain components below the normal operating input voltage Disclosed is an invention relating to a power supply for use in an apparatus for measuring electrical energy, comprising, in one embodiment, a first switching device, a device for storing electrical charge in electrical connection with the first switching device, a ... | 04/08/2008 |
| 7336509 | Method and apparatus for estimating line inductance for PWM rectifier control A rectifier includes a switching circuit and a controller. The switching circuit is coupled between positive and negative buses and a plurality of input voltage sources. The switching circuit includes a plurality of pairs of switching devices. Each pair is associate... | 02/26/2008 |
| 7330364 | 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... | 02/12/2008 |
| 7315150 | Method of power conversion and apparatus which achieves high power factor correction using ripple current mode control A ripple current mode power converter comprised of a magnetic energy storage element, and a method of determining magnetic storage element charge duration based on periodic magnetic storage element current samples. In the preferred embodiment a controller processes ... | 01/01/2008 |
| 7310250 | Output voltage circuit of power supply An output voltage circuit for power supply aims to arrange output DC power according to component voltage and equalizing current. The power supply has a voltage transformation circuit which consists of transformers each has at least one high voltage power and one lo... | 12/18/2007 |
| 7276859 | Three-phase electronic ballast with improved three-phase EMI filter A ballast (20) for powering at least one gas discharge lamp (52) from a three-phase AC voltage source (30) comprises a three-phase rectifier circuit (200), a high frequency filter capacitor (300), a high frequency inverter (400 | 10/02/2007 |
| 7274579 | Converter circuit and motor driving apparatus A converter circuit for converting an output voltage from an AC power supply includes a rectifier circuit for rectifying the output voltage of the AC power supply; first and second capacitors connected in series, for smoothing the output of the rectifier circuit; an... | 09/25/2007 |
| 7272023 | High efficiency power converter A power converter nearly losslessly delivers energy and recovers energy from capacitors associated with controlled rectifiers in a secondary winding circuit, each controlled rectifier having a parallel uncontrolled rectifier. First and second primary switches in ser... | 09/18/2007 |
| 7259971 | Encapsulated electronic power converter with embedded AC components A self-contained and encapsulated AC to Voltage supplying module containing a complete set of AC circuitry components therein and directly connecting the components to the AC voltage source, an inrush protection circuit, a DC-DC converter and power control circuits ... | 08/21/2007 |
| 7257010 | 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 ... | 08/14/2007 |
| 7254000 | Over voltage protection scheme for synchronous buck converter An over voltage protection circuit for single phase and multiphase buck converters. According to one embodiment, upon the occurrence of an over voltage condition, the high side switch is turned Off and the low side switch is On. As the output voltage drops below a l... | 08/07/2007 |
| 7224592 | Multi-period cycle-alternative switching mode power supply control device and its control method The present invention relates to a multi-period cycle-alternative switching mode power supply control device and its control method, and the device comprises: a power transfer control unit, a dimming bias control, a burst timing control, and a steering logic; and th... | 05/29/2007 |
| 7190143 | Pulse width modulation (PWM) rectifier with variable switching frequency A method for controlling a device including a plurality of switching devices operated in accordance with a pulse width modulation technique includes receiving a reference voltage signal associated with a first pair of the switching devices. A switching signal is gen... | 03/13/2007 |
| 7187158 | Process device with switching power supply A process field device for coupling to a two wire process control loop includes a field device circuitry and a switching regulator to power the circuitry. A series regulator provides a regulated supply voltage to the switching regulator. A noise filter reduces the a... | 03/06/2007 |
| 7180762 | Cascoded rectifier A high voltage rectifier device exhibiting low forward resistance and fast switching time formed of a high voltage structure connected in a cascode configuration with a low voltage structure. The high voltage structure is a bidirectional normally on semiconductor sw... | 02/20/2007 |
| 7164590 | Power transfer system with reduced component ratings A power inverter control adjusts input power to track with output power to reduce energy handling requirements for an inverter DC bus. Input power to the power inverter circuit is measured and compared with a measurement of inverter output power. The comparison resu... | 01/16/2007 |
| 7158012 | Non-invasive powerline communications system A non-invasive powerline communications system includes: means for generating communication signals at a first location for transmission on a powerline; means for reactively coupling the communication signals to the powerline; and means for receiving said communicat... | 01/02/2007 |
| 7129677 | Vector controller, a polyphase synchronous rectifier, and a method of vector-controlling thereof A vector controller for a polyphase synchronous rectifier, a method of vector-controlling a polyphase synchronous rectifier, and a synchronous rectifier incorporating the vector controller or the method. In one embodiment, the vector controller includes: (1) an inpu... | 10/31/2006 |
| 7123494 | Power factor correction circuit and method of varying switching frequency A power factor correction (PFC) circuit (10) includes a pulse width modulator (31) operating in response to a clock signal (CLK) for switching a coil current (ICOIL) over a charging period (TCHG) to correct a power factor at a node (32). The coi... | 10/17/2006 |
| 7110895 | Leakage current or resistance measurement method, and monitoring apparatus and monitoring system of the same A method for measuring the resistance component current included in the leakage current is provided. In a monitoring apparatus and system for measurement the signal waveform of at least one AC cycle is sampled. The resistance component leakage current is measured by... | 09/19/2006 |
| 7105949 | Emergent power supply system and method of achieving input current balance in such system An emergent power supply system capable of automatically balancing the input currents of a multiplicity of backup power supply modules therein is addressed. The emergent power supply system according to the present invention includes a multiplicity of backup power s... | 09/12/2006 |
| 7068524 | Generator An abnormality of a generator provided with a plurality of power supply units is easily detected. Each of the power supply units includes each of output windings L1 to L4, which are wound independently of each other around the single iron core, and eac... | 06/27/2006 |
| 7068523 | Parallel feed-forward compensating type power factor correction circuit for a three-phase power source A parallel feed-forward compensation type three-phase power factor correction circuit for a three-phase power supply comprises a primary rectifying circuit I, and a feed-forward compensation circuit II which is in parallel with the primary rectifying circuit I. The ... | 06/27/2006 |
| 7054771 | Bus line current calibration Disclosed herein is a method and system for calibrating line drive currents in systems that generate data signals by varying line drive currents and that interpret the data signals by comparing them to one or more reference voltages. The calibration includes varying... | 05/30/2006 |
| 7047110 | Method and apparatus for controlling a power supply A method for controlling a power supply, the method comprising: forming a front-end to the power supply, the front-end comprising a plurality of digital-to-analog circuits under control of a controller; and programming the controller to control the digital-to-analog... | 05/16/2006 |
| 7023102 | Power generation controller for AC generator A power generation controller for an AC generator detects the state of a battery and an electric load to control the output of the AC generator. A current detector detects a current to be used by an electric load on the vehicle. The controller includes a field curre... | 04/04/2006 |
| 7019993 | Piezoelectric transformer and modular connections for high power and high voltage power supplies A modular design for combining piezoelectric transformers is provided for high voltage and high power conversion applications. The input portions of individual piezoelectric transformers are driven for a single power supply. This created the vibration and the conver... | 03/28/2006 |
| 7012824 | Voltage converting method and voltage converting apparatus using large electrolytic condenser A voltage converting method and a voltage converting apparatus using a large electrolytic condenser are provided. In the method according to an embodiment of the invention, when the level of an input alternating voltage is equal to or greater than a first predetermi... | 03/14/2006 |
| 7005829 | System for precharging a DC link in a variable speed drive A variable speed drive with a converter that is controllable to precharge a DC link is provided. The variable speed drive also includes an inverter. The converter converts a fixed line frequency, fixed line voltage AC power from an AC power source into DC power. The... | 02/28/2006 |
| 6980449 | Voltage detecting circuit and power converter having the same A voltage detecting circuit including an impedance converter, an energy storage element, a current source and a comparing circuit is disclosed. The impedance converter is used for converting a high impedance voltage signal into a low impedance voltage signal. The en... | 12/27/2005 |
| 6952357 | Power supply control apparatus An electric power supply control apparatus, which starts an interruption process upon detecting a voltage lower than a predetermined voltage, then detecting the electric power supply voltage again and, in case the predetermined voltage is recovered, does not execute... | 10/04/2005 |
