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| Number | Title | Issue Date |
| 7936576 | Power controller A power controller (10) includes a controller (11) and a trigger circuit (12). When the voltage of a power supply received at terminals T1 exceeds a threshold, for example 120 V RMS, reverse-connected Zener diodes Z1 to Z3 c... | 05/03/2011 |
| 7684223 | Automatic power supply converting circuit An automatic power supply converting circuit includes a live input terminal, a neutral input terminal, a relay, a regulator, a voltage divider circuit, an identifying circuit, a switch circuit and a voltage doubling circuit. The live input terminal and the neutral i... | 03/23/2010 |
| 7397680 | Method and apparatus for balancing active capacitor leakage current A circuit that provides a method and apparatus to actively balance capacitor leakage current from series stacked capacitors and disconnects itself when stacked capacitors are configured for doubler operation. In one embodiment, the active circuit includes high volta... | 07/08/2008 |
| 7339485 | Rectifier for supplying double voltage and RFID tag thereof Disclosed is a rectifier for supplying double voltage and an RFID tag thereof. The rectifier includes a charging part for charging an input voltage induced to input ends by a received radio frequency (RF) signal; a power provider for charging a sum voltage correspon... | 03/04/2008 |
| 7333354 | Switch for power factor correction circuits An improved switch for power factor correction circuits includes a six-terminal switch which has a first inductor connecting to a selection line which has a first switch terminal and a second switch terminal, and a second inductor connecting to a conductive line. Wh... | 02/19/2008 |
| 7321483 | Power converter A power converter comprising: a rectifier arrangement (D1-D4) having inputs coupled to AC power supply terminals; a pair of series-connected capacitors (C1, C2) coupled across output terminals of the rectifier arrangement; a switch (S1... | 01/22/2008 |
| 7301755 | 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. Additional... | 11/27/2007 |
| 7245475 | Wide input voltage range relay drive circuit for universal defrost timer A wide input voltage range relay drive circuit allowing a more than 2:1 input voltage variation is provided. The circuit utilizes a scaled and rectified bulk voltage to drive the relay coil. As the monitored bulk voltage increases beyond the relay coil rated voltage... | 07/17/2007 |
| 7236380 | Rectifier system having different rectifier elements A rectifier system, in particular a rectifier bridge for a three-phase generator, includes a plurality of rectifier elements, specifiable rectifier elements being different from the other rectifier elements in at least one property. The rectifier elements are, for e... | 06/26/2007 |
| 7177168 | Power converting apparatus and power generating apparatus AC module makers must prepare two types of AC modules for the 100-V and 200-V outputs only for domestic supply. For foreign countries, the makers must manufacture AC modules compatible with more system voltages. To solve these problems, the control circuit of an AC ... | 02/13/2007 |
| 7133301 | Method and apparatus for balancing active capacitor leakage current A circuit that provides a method and apparatus to actively balance capacitor leakage current from series stacked capacitors and disconnects itself when stacked capacitors are configured for doubler operation. In one embodiment, the active circuit includes high volta... | 11/07/2006 |
| 7103487 | Circuitry and methods for current measurements referred to a precision impedance Circuitry and methods for obtaining accurate measurements of current supplied by an integrated circuit are provided. Current calculations are performed using information from a precision termination resistor and from the ratio relationship of two on-chip resistors. ... | 09/05/2006 |
| 7050916 | Method for power quality summary and trending A system for accumulating and evaluating electromagnetic phenomena of at least one power quality category of a power distribution system, using a circuit monitor or processing system that summarizes and trends electromagnetic phenomena. The system provides for expre... | 05/23/2006 |
| 7035123 | Frequency converter and its control method Method of controlling a voltage controlled PWM (Pulse Width Modulated) frequency converter comprising a single phase rectifier bridge (10) connectable to a sinusoidal single phase supply, a DC intermediate circuit (11) and a controlled inverter bridge ... | 04/25/2006 |
| 6980451 | Method and apparatus for balancing active capacitor leakage current A circuit that provides a method and apparatus to actively balance capacitor leakage current from series stacked capacitors and disconnects itself when stacked capacitors are configured for doubler operation. In one embodiment, the active circuit includes high volta... | 12/27/2005 |
| 6944556 | Circuits and methods for current measurements referred to a precision impedance Circuitry and methods for obtaining accurate measurements of current supplied by an integrated circuit are provided. Current calculations are performed using information from a precision termination resistor and from the ratio relationship of two on-chip resistors. ... | 09/13/2005 |
| 6738277 | Method and apparatus for balancing active capacitor leakage current A circuit that provides a method and apparatus to actively balance capacitor leakage current from series stacked capacitors and disconnects itself when stacked capacitors are configured for doubler operation. In one embodiment, the active circuit includes high volta... | 05/18/2004 |
| 6515379 | Power supply apparatus, method, and electronic apparatus When a relay (21) is controlled, an AC voltage (1) may be rectified in a full-wave rectification fashion. In a voltage-doubler rectification fashion, and a rectified output supplied to a main converter (6) or the AC voltage (1) may be rectified in a half-... | 02/04/2003 |
| 6434005 | Power converter packaging A power converter includes a housing, heat generating circuitry in the housing, and a heat conducting metal sheath on the outside of the housing. The housing has an elongated-box shape including two relatively smaller ends and four relatively larger sides... | 08/13/2002 |
| 6407936 | Capacitive boost for line harmonic improvement in power converters AC line harmonics are reduced in an AC-powered DC power supply by providing a boost circuit which, during the positive half-cycle of the AC input, adds the charge of a boost capacitor to the AC input voltage so as to initiate current flow through the harm... | 06/18/2002 |
| 6310901 | Automated AC filament universal laser power controller in a gas ion laser system and method A power supply is provided for use in a laser system including a gas ion laser tube which requires a filament voltage provided by an output section of the power supply. The filament voltage provided should not exceed a maximum AC filament voltage specifie... | 10/30/2001 |
| 6236584 | Automatic voltage conversion module Automatic voltage conversion module including a rectifier for receiving and rectifying a utility AC power, a smoother for smoothing a voltage rectified at the rectifier, a voltage sensor for sensing the voltage from the smoother to determine an amplitude ... | 05/22/2001 |
| 6147888 | Voltage converting circuit The present invention relates to a voltage converting circuit adapted to being supplied by at least two rectified A.C. voltages of different levels, including at least two capacitors and a switching circuit to organize a parallel discharge of the capacito... | 11/14/2000 |
| 6147882 | Single-stage input current shaping technique with voltage-doubler rectifier front-end A single-stage input-current-shaping (S2 ICS) converter of the present invention integrates a voltage-doubler-rectifier front-end with a DC/DC output stage. Two families of voltage-doubler S2 ICS converters are disclosed. In one fami... | 11/14/2000 |
| 6137700 | Converter with a high power factor using a DC center point voltage Switching control is remarkably simplified and a DC voltage is boosted, and then, an input power factor is sufficiently improved and harmonics are reduced by connecting a full-wave rectifier circuit to an AC power source through a reactor, and connecting ... | 10/24/2000 |
| 6134134 | Thermostat voltage adapter The present invention is a voltage adapter for a low voltage thermostat which permits the following input voltage ranges: 100-132 VAC/50 or 60 Hz, 200-264 VAC/50 or 60 Hz, and 265-330 VAC/50 or 60 Hz maintaining an output of at or just effectively about 24 VAC.... | 10/17/2000 |
| 6104737 | Universal laser power controller in a gas ion laser system A multi-mode/universal laser power controller is disclosed for use in an overall laser system. An associated method is also disclosed. The controller may drive one of at least two different laser tubes which require different particular sets of drive volt... | 08/15/2000 |
| 6046922 | Multistandard rectified power supply circuit A multistandard rectified supply circuit comprises, across a full wave rectifying bridge, at least one storing element associated with a charge path comprising first unidirectional conductive elements of a first polarity and with a discharge path comprisi... | 04/04/2000 |
| 5995400 | Uninterruptible power supply system with removable front panel display and control module An uninterruptible power supply (UPS) system includes a control and display module operational with a UPS when carried by a housing of the UPS and when remote from the housing. An orientation sensing switch carried by the module senses a horizontal or ver... | 11/30/1999 |
| 5977658 | Voltage doubling alternating current power supply An alternating current power supply for providing a high-voltage alternating current power output from a first low-voltage alternating current power source and a second low-voltage alternating current power source is disclosed. A first alternating current... | 11/02/1999 |
| 5973948 | Universal linear power supply A universal linear power supply capable of automatically supplying a regulated DC current output from a range of AC input. In one preferred embodiment, interchangeable modular electrical plugs configured to mate with standard AC supplies releasably connec... | 10/26/1999 |
| 5959857 | Power supply apparatus for producing a constant DC voltage from a range of AC inputs A power source apparatus where an exciting current of a primary winding of an insulating converter transformer is switched by a switching element and an oscillation state of an oscillating drive circuit connected to the switching element is controlled acc... | 09/28/1999 |
| 5956243 | Three-level boost rectifier with voltage doubling switch An three-level boost rectifier circuit is described for universal line applications. The boost rectifier circuit includes a boost inductor connected to the input voltage. A bridge rectifier composed of four diodes is connected between the boost inductor a... | 09/21/1999 |
| 5892676 | Rectifier bridges assembly having improved heat dispersing characteristics and an arcing-free design A rectifier bridges assembly for use with an automotive alternator includes a base plate conductively mounted to a ground and providing a negative heat sink, and an overlying finned positive heat sink structure having a surface area at least twice that of... | 04/06/1999 |
| 5886892 | Power supply with improved inrush circuit for limiting inrush current A new and improved rectifier power supply operates in a low voltage mode of operation and a high voltage mode of operation without user intervention and includes an inrush current limiting device that is in circuit during a predetermined period of time du... | 03/23/1999 |
| 5831846 | Dual mode boost converter and method of operation thereof A boost converter, a method of operating the same and a power converter employing the boost converter or the method. In one embodiment, the boost converter includes: (1) a rectifier bridge having first and second input nodes and first and second output no... | 11/03/1998 |
| 5793626 | High efficiency bimodal power converter and method of operation thereof A bimodal power converter, having an input couplable to a voltage source, provides a charging current to at least one of first and second serially-coupled output energy storage devices. The bimodal converter includes power switching circuitry, coupled to ... | 08/11/1998 |
| 5781427 | Multistandard rectified power supply circuit with power factor correction option A multistandard rectified supply circuit comprises, across a full wave rectifying bridge, at least one storing element associated with a charge path comprising first unidirectional conductive elements of a first polarity and with a discharge path comprisi... | 07/14/1998 |
| 5771168 | Power factor correction apparatus The present invention relates to a power factor correction apparatus, which comprises: a rectifier device being inputted with one of a first amplitude AC voltage signal and a second amplitude AC voltage signal, wherein said first amplitude is higher than ... | 06/23/1998 |
| 5737209 | Power quality and demand management module A device that may be inserted into a power cord or power distribution system prior to a computer, monitor or like devices for correcting the inherently bad power quality of such devices and for eliminating the losses and damage to and within the power dis... | 04/07/1998 |
