Quotables
"It is my heart-warmed and world-embracing Christmas hope and aspiration that all of us, the high, the low, the rich, the poor, the admired, the despised, the loved, the hated, the civilized, the savage (every man and brother of us all throughout the whole earth), may eventually be gathered together in a heaven of everlasting rest and peace and bliss, except the inventor of the telephone. "
Mark Twain ; Christmas greetings, 1890
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| Number | Title | Issue Date |
| 8036005 | Switching apparatus for grounding an inverter A switching apparatus for grounding an inverter (3) that converts a direct current voltage into an alternative current voltage at mains frequency, with an inverter housing (7) and with a safety fuse (8) that connects a positive or a negative dir... | 10/11/2011 |
| 8036004 | Uninterruptible power supply with total isolation An uninterruptible power supply includes an isolation transformer having dual primary windings. The secondary winding generates an output voltage based on the magnetic field generated in one of the dual primary windings. A first primary winding is coupled to an inve... | 10/11/2011 |
| 7978487 | Switching power supply and over-temperature protection method A switching power supply includes an energy-storing device, a power switch, a driving circuit and a thermal sensing device. The energy-storing device is coupled to an input power source and controlled by the power switch to increase or decrease the power therein. Th... | 07/12/2011 |
| 7843710 | Apparatus and method for controlling power converter A power converter controlling apparatus that can prevent burnout caused by overcurrent and/or overvoltage generated by low power index operation or output short circuit in a high frequency power converter employing a digital controlling method, and a method thereof.... | 11/30/2010 |
| 7646619 | Apparatus and method for controlling power converter A power converter controlling apparatus that can prevent burnout caused by overcurrent and/or overvoltage generated by low power index operation or output short circuit in a high frequency power converter employing a digital controlling method, and a method thereof.... | 01/12/2010 |
| 7616460 | Apparatus, system, and method for AC bus loss detection and AC bus disconnection for electric vehicles having a house keeping power supply An alternating current (AC) bus malfunction detection and protection module monitors an AC voltage that is provided on a bus by a house keeping power supply of a power system. If the AC voltage on the bus falls below a first level, the module provides a delay before... | 11/10/2009 |
| 7577005 | Method for recognizing the load of an island inverter and island inverter The invention relates to a method for recognizing the operational state of a load (10) connected to the output (6, 7) of an island inverter (1). A load recognition signal (SL) is applied at specific moments in time to the output (6... | 08/18/2009 |
| 7561449 | DC-AC converter and method for protecting DC-AC converter from overcurrent A DC-AC converter for converting DC voltage to AC voltage. The converter includes a conversion circuit for converting DC voltage to voltage having a polarity corresponding to AC voltage. A filter circuit receives the converted voltage, smoothes the converted voltage... | 07/14/2009 |
| 7542313 | Induction heating apparatus capable of stably operating at least one switching element contained therein An induction heating apparatus capable of stably operating at least one switching element contained therein is provided with a control circuit 5 which comprises a resonance waveform detector 6 for detecting a high frequency AC waveform supplied from an... | 06/02/2009 |
| 7430132 | Medium voltage inverter system A medium or high voltage multi-inverter system is described, in which multiple inverter cells are included in a phase line to increase the voltage level supported by the system, and support higher voltage loads such as AC three-phase motors. In one configuration, fi... | 09/30/2008 |
| 7362600 | Method and apparatus for cycle error correction for a power converter device, such as an electronic power inverter Cycle error correction is performed in an electronic power system to compensate for a difference between an AC grid side frequency and an AC load side frequency. The electronic power system includes an electronic power inverter, such as one usable with an uninterrup... | 04/22/2008 |
| 7352544 | Method and apparatus for providing a remedial strategy for an electrical circuit A method and electrical circuit for dynamic reconfiguration of a DC-to-AC inverter comprising first and second power rails where each the rails has a power source. The method comprises monitoring the first and second power rails for short-circuit failure; and upon f... | 04/01/2008 |
| 7339807 | Power supply apparatus One of a plurality of voltages is adapted to be applied to power supply terminals (2a, 2b, 2c). A rectifying circuit (6) rectifies the applied voltage and develops a rectified voltage between the output terminals (... | 03/04/2008 |
| 7337333 | System and method for strategic power supply sequencing in a computer system with multiple processing resources and multiple power supplies A system and method are provided for strategic power supply sequencing in a computer system. The system and method includes a plurality of processing resources that process data and a plurality of power supplies that provide power for the processing resources. A pow... | 02/26/2008 |
| 7325050 | System and method for strategic power reduction in a computer system A system and method are provided for strategic power reduction in a computer system. The system and method includes a plurality of processing resources that process data. Associated with the processing resources are a plurality of power supplies that provide power f... | 01/29/2008 |
| 7313003 | Switching power supply unit The present invention provides a switching power supply unit capable of suppressing a surge voltage generated in a rectifier element more effectively. A first resonance circuit is constructed by capacitors in a surge voltage suppressing circuit and an inductor, and ... | 12/25/2007 |
| 7304874 | Compact ternary and binary CAM bitcell architecture with no enclosed diffusion areas Improved layouts of binary and ternary content addressable memory cells (BCAM and TCAM) are shown. A content addressable memory cell layout has a plurality of P+ diffusion areas and a plurality of N+ diffusion areas that do not enclose isolation regions and on which... | 12/04/2007 |
| 7288923 | Voltage-limited electric machine An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another... | 10/30/2007 |
| 7280331 | Power reconnect and voltage control In one aspect, a power connect device receives ac line voltage and provides ac load voltage to a load device. In one embodiment, the power connect device includes: a connect panel, a transformer circuit, a high voltage relay, a rectifier, and a voltage protection ci... | 10/09/2007 |
| 7277000 | Inductor and transformer In an inductor having a core and first and second coils wound upon the core, the wire of the first coil and the wire of the second coil lie are wound so as to lie parallel to each other and contact the core. The winding starting position of the first coil is made to... | 10/02/2007 |
| 7233113 | Power supply system for liquid crystal monitors A power supply system for liquid crystal monitors includes a first DC/AC converter (FBS, HBS) operating at predetermined frequency and duty-cycles and being fed by a second DC/DC converter (FC) which regulates the circuit voltage. The feeding system can feed all the... | 06/19/2007 |
| 7187563 | DC/DC converter with multiple mutually-isolated power sources An electronic circuit includes a first power source, a second power source, a load, and a converter connected to each power source and the load. The converter has (i) a first oscillator circuit connected to the first power source, (ii) a second oscillator circuit co... | 03/06/2007 |
| 7184282 | Single-phase power conversion device and three-phase power conversion device To suppress a DC component in AC power in a power converter for converting DC power to AC power. DC power is converted to AC power by a converter 2, and the AC power is supplied to output terminals u1 and u2 via an inductor 3. The convert... | 02/27/2007 |
| 7183667 | Method and apparatus for power inverter synchronization A control circuit synchronizes an ac power inverter to the mains voltage of an electrical grid by matching the fundamental phasor components of the inverter's output voltage to the fundamental phasor components of the mains voltage. Once such matching meets an accep... | 02/27/2007 |
| 7158394 | Switching power supply circuit with a soft-start function A switching power supply circuit reduces the time from start-up driving to normal operation while a soft-start is carried out with an output voltage Vout. A soft-start capacitor is charged during the start-up time. After a soft-start voltage Vz has reached a predete... | 01/02/2007 |
| 7158393 | Power conversion and voltage sag correction with regenerative loads In dynamic voltage sag correctors and other power conversion equipment having a DC bus that is subject to over-voltage conditions due to power being fed back by a regenerative load, a bus discharge switching device and a discharge resistor are connected in series ac... | 01/02/2007 |
| 7148650 | Maximum power point motor control A method and apparatus are implemented in software to control motor speed as a function of available power in a DC source-inverter-AC motor system, i.e. to perform maximum power tracking of motor speed. An inverter or motor drive converts DC power from a DC source, ... | 12/12/2006 |
| 7145268 | Fault-tolerant three-level inverter A method for driving a neutral point clamped three-level inverter is provided. In one exemplary embodiment, DC current is received at a neutral point-clamped three-level inverter. The inverter has a plurality of nodes including first, second and third output nodes. ... | 12/05/2006 |
| 7126294 | Method and device for controlling photovoltaic inverter, and feed water device A photovoltaic inverter control method includes steps of monitoring a variation in output voltage of a solar battery by a power and voltage monitoring circuit (51) and, when the variation occurs, accelerating or decelerating an electric motor (3) to ma... | 10/24/2006 |
| 7126300 | Motor drive system A first and a second motor drive amplifiers connected to a motor drive power supply include a first and a second memories which store specifications of the amplifiers, respectively. A memory provided in a power supply unit stores an overcurrent detection value for d... | 10/24/2006 |
| 7099169 | DC to AC inverter with single-switch bipolar boost circuit This invention improves the performance and lowers the cost of DC to AC inverters and the systems where these inverters are used. The performance enhancements are most valuable in renewable and distributed energy applications where high power conversion efficiencies... | 08/29/2006 |
| 7088597 | High voltage supply device for eliminating a surge voltage A high voltage supply device including a power supply rectifying an externally inputted ac voltage and generating a first dc voltage and a second dc voltage, a controller generating a pulse signal having a predetermined duty ratio and a control signal having a first... | 08/08/2006 |
| 7082041 | Power supply filtering A power supply is filtered while the amount of in-rush current required by the capacitive charging of the filter is limited. A resistor may be placed in parallel with a relay where the parallel combination is in series with the filtering capacitor. The relay is open... | 07/25/2006 |
| 7064969 | Monopolar DC to bipolar to AC converter This invention improves the performance and lowers the cost of DC to AC inverters and the systems where these inverters are used. The performance enhancements are most valuable in renewable and distributed energy applications where high power conversion efficiencies... | 06/20/2006 |
| 7042192 | Switch assembly, electric machine having the switch assembly, and method of controlling the same A compressor having a winding circuit and a driven member being driven in part by a winding of the winding circuit. The compressor further includes an auxiliary circuit connected in a parallel relationship with the winding circuit. The auxiliary circuit has an auxil... | 05/09/2006 |
| 7042110 | Variable speed distributed drive train wind turbine system A variable speed wind turbine employing a rotor connected to a multiplicity of synchronous generators with wound field or permanent magnet rotors. A passive rectifier and an inverter are used for power transfer back to the grid. A Turbine Control Unit (TCU) commands... | 05/09/2006 |
| 7042182 | Electronically commutated motor operable directly from AC power network An electronically commutated motor (10) is adapted to be powered directly by an AC voltage (UAC) source, and comprises a permanent-magnet rotor (18), a stator having at least one winding phase (L1, L2, . . . , Ln), a rectifier ... | 05/09/2006 |
| 7038430 | Power control circuit A power control circuit includes a switching regulator for converting voltage of external electric power into a medium voltage, a series regulator for converting the medium voltage to a prescribed voltage of output power to be supplied and a circuit for operating ei... | 05/02/2006 |
| 7031176 | Inverter In a system for the conversion between DC power and AC power, including a buffercapacitor and a controllable converting arrangement, said conversion is controlled by a power control quantity that in turn depends on a first component assuring a balance between DC pow... | 04/18/2006 |
| 7012816 | Self-excited switching power supply circuit A self-excited switching power supply circuit is provided which reduces a discharge current generated when an oscillating field effect transistor (3) is turned on, whereby it is possible to reduce energy loss and generation of noise when switching is executed... | 03/14/2006 |
