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| Number | Title | Issue Date |
| 7777368 | Redundant power supply with pulse width modulation soft start feature Various systems and methods for providing a pulse width modulation soft start feature in a redundant power supply are disclosed. One method involves comparing an input voltage, which is received from a load unit, to a threshold voltage. If the input voltage is less ... | 08/17/2010 |
| 7638900 | Bi-directional DC-DC converter A bi-directional DC-DC converter includes a first series circuit connected to ends of a first DC power source and including a first winding of a first reactor and a first switch; a second series circuit connected to ends of the first switch and including a second wi... | 12/29/2009 |
| 7411316 | Dual-input power converter and control methods thereof A dual-input power converter comprises two power stages using a common low-side element, a first input for coupling a first input voltage to the first power stage, a second input for coupling a second input voltage to the second power stage, and a controller for dri... | 08/12/2008 |
| 7408270 | Forward converter Usually, power supplies are not capable of switching off part of the outputs of a main power supply during stand-by. Due to this, stand-by power supplies are used in addition to operation power supplies. Consistent with an example embodiment, a forward converter is ... | 08/05/2008 |
| 7408275 | Preventive maintenance tapping and duty cycle monitor for voltage regulator Automatically changing the tap position in a load tap changer includes noting a polarity of a first tap position of a load tap changer. A duration for which one or more consecutive tap positions of the load tap changer collectively have had the noted polarity also i... | 08/05/2008 |
| 7362009 | Chain reaction control circuit for parallel power supply A chain reaction control circuit for parallel power supply provides greater power without changing the design of the original power supply structure. It includes a control unit to receive a first power actuation signal output from a power actuation unit, then output... | 04/22/2008 |
| 7345381 | Converter to provide an output voltage for plural input voltages A system comprises a converter to produce an output voltage from at least a first input voltage and a second input voltage, and a selector to select a first circuit path in the converter to produce the output voltage from the first input voltage, and to select a sec... | 03/18/2008 |
| 7339808 | Method and apparatus for DC to AC power generator The dc to ac power generator has a DC power source which is connected at one pole to the primary of a conventional voltage transformer, and at its other pole to a relay controlled switching system. A mechanical switch of the relay is connected to the opposite pole o... | 03/04/2008 |
| 7279867 | Method for balancing cells or groups of cells in a battery pack A method for balancing cells or groups of cells connected in parallel and in series for a battery pack by providing a continuously balanced state of charge while in a discharge phase, a charge phase, a quiescent phase, a storage phase, or combinations of these phase... | 10/09/2007 |
| 7274170 | Battery pack control module A battery pack control module for balancing a plurality of cells or groups of cells connected in series includes a controller assembly, a disconnect circuit, a pack sensing circuit, a balancing circuit, and computer instructions for instructing the controller assemb... | 09/25/2007 |
| 7247633 | Pyrimidine compounds and their use A compound of the general formula (I): wherein R1, R2, X, Y and Z are as described in the specification. ... | 07/24/2007 |
| 7204619 | Battery operated sconces and chandeliers Battery operated sconces, battery operated chandeliers, battery operated candles and candles with unique shapes are disclosed. ... | 04/17/2007 |
| 7199556 | Method for extending power duration for lithium ion batteries A method for extending the power duration of lithium ion cells or groups of lithium ion cells connected in parallel and in series by providing a continuously balanced state of charge while in a discharge phase, a charge phase, a quiescent phase, a storage phase, or ... | 04/03/2007 |
| 7157881 | Safety device for managing batteries A safety device for lithium ion cells or groups of lithium ion cells connected in parallel and in series by providing a continuously balanced state of charge while in a discharge phase, a charge phase, a quiescent phase, a storage phase, or combinations of these pha... | 01/02/2007 |
| 7132765 | Switch mode power supply having only one inductive element an several outputs and method of controlling same The switch mode power supply includes a switching cell SC controllable cyclically and including only one inductive element L and several individually selectable outputs. During each conduction cycle, a total power level corresponding to the sum of the individual pow... | 11/07/2006 |
| 7109606 | High-security electric power supply device An electrical energy supply device, in particular for carriage on board an aerodyne, supplying DC current to electrical consumers from at least one electrical network chosen by a selector circuit of the supply device, from a plurality of electrical networks. The sup... | 09/19/2006 |
| 7095138 | Controller for plural supplies driving single load A controller is disclosed for determining that the currents from the two AC power sources are correctly phased. Required circuitry can be disposed within a housing from which extend power cables having single phase 240V AC, 50 A male connector plugs connected at rem... | 08/22/2006 |
| 7038522 | System and method for redundant power supply connection A system for connecting a receiver to a redundant power supply. The power supply units are connected to the receiver by means of a pair of control switches, each being connected in series between one of the power units and the receiver, and each having its intrinsic... | 05/02/2006 |
| 7019416 | Power source circuit, electronic device being equipped with same power source circuit and control method of power source circuit A power source circuit capable of improving an efficiency of using energy of a chemical battery cell by responding suitably to an intermittent change in a load current, by during a load burst period in an odd-numbered order, a load is driven by power accumulated in ... | 03/28/2006 |
| 6841896 | Dual supply voltages converter and method A dual supply voltages converter divides a supply voltage by a constant to produce a feature voltage larger than one when the supply voltage is a first voltage and smaller than 1 when the supply voltage is a second voltage and squares the feature voltage for compari... | 01/11/2005 |
| 6770983 | Method and apparatus for powering lower D.C. voltage rated devices An apparatus and method for delivering power from a D.C. voltage source to one or more D.C. loads rated at lower voltages. The invention provides for the repetitive application of the higher D.C. voltage to the loads for a predetermined time period sufficient for th... | 08/03/2004 |
| 6624537 | Plural output electric train control station A plural output control station for operating electrical apparatus, such as model electric train engines and accessories. The control station employs a data processor for monitoring and controlling the signals generated at a plurality of transformer-drive... | 09/23/2003 |
| 6593671 | Process and apparatus for supplying electric energy to the wiring of a motor vehicle Process for electrically energizing a motor vehicle wiring circuit which has a battery, at least one electric consuming device and a fuel cell unit connected therein. The fuel cell unit is activated when the battery voltage falls below a preadjustable bat... | 07/15/2003 |
| 6570270 | Power conditioner for solar power generation system An inverter unit converts power from a solar battery into AC power and interconnects the AC power with a utility power supply. A control circuit manages the time during which the inverter unit stops. If the time is equal to or longer than a predetermined ... | 05/27/2003 |
| 6566846 | Cascode regulator with plural outputs The present invention provides a circuit and method having a fast response time for generating a regulated voltage from a first voltage source. The circuit includes a driver for generating a drive signal. The driver has a clock input coupled to a clock si... | 05/20/2003 |
| 6492745 | Battery disconnect system A battery control system for controlling the connection of a plurality of batteries to a load is provided. The system comprises a plurality of switches and a plurality of controllers. Each switch is operable to connect or disconnect one of the batteries f... | 12/10/2002 |
| 6177739 | Electric power source for equipment having power saving mode, power saving control device and image forming apparatus having the power source In an electric power supply for supplying electric power, after a power factor has been improved, to an equipment having a power saving mode which is transferred to the power saving mode when the equipment is not operated for a predetermined period of tim... | 01/23/2001 |
| 6144115 | Power share distribution system and method A power share distribution system and method. Included are: a plurality of power supplies; an isolator provided for each power supply of the plurality of power supplies for selectively blocking/passing an output power from the power supply; and a controll... | 11/07/2000 |
| 6137190 | Method and system for providing coordinated turn on of paralleled power supplies A power supply includes a turn on circuit which coordinates turn on of all paralleled power supplies supplying power to an electronic system such as a computer system. Upon detecting that its input voltage is sufficient to turn on, the power supply waits ... | 10/24/2000 |
| 6034443 | Method and device for supplying electrical energy, and apparatus provided with such a device A method and device for supplying electrical energy to an electrical load using a set of chargeable and dischargeable direct current sources is provided. In a first step, all the direct current sources of the set are charged. In a second step, the first o... | 03/07/2000 |
| 6023109 | Multi-voltage control circuit of battery or multiple independent DC power Circuit of multi-voltage control circuit of battery of multiple independent DC power consists of a diode compound switch contact for resisting sparkle and segmented current when multi-voltage switches add the non-sparkle switch for series of solid switch ... | 02/08/2000 |
| 5698908 | Buffered DC power supply system Power supply system having a buffered intermediate voltage which is supplied by an auxiliary voltage source in the event of failure of a principal voltage source, there being generated from the intermediate voltage by comparison with a threshold value a d... | 12/16/1997 |
| 5650672 | High-voltage power multiplexor A multiplexor having a multiplexor control input terminal for selectively providing one of a plurality of conductor voltage levels to a conductor. The multiplexor includes a first switch, which is coupled to the conductor, for providing a first conductor ... | 07/22/1997 |
| 5621254 | Uninterruptible power switching method and apparatus A change-over switch performs switching between two different power supplies after connecting both power supplies simultaneously for a given time period. A controller controls the change-over switch to perform the switching operation around a synchronous ... | 04/15/1997 |
| 5552643 | Power signal combining method and apparatus A buck-topology switching power supply (100) combines a plurality, n, of signals (111, 121, 131) from a like number (n) of substantially direct-current power sources by means of a single inductor (150). As k varies from 1 to n, a controller (170) acts to ... | 09/03/1996 |
| 5541458 | Power supply for timed residual power after turn off This invention relates to an improved laser printer power supply that maintains 24-, 12-, and 5 volt DC power to run exhaust fans for a brief period after the power switch is turned off. These fans remove undesirable ozone from the photo-conducting print ... | 07/30/1996 |
| 5514916 | Power unit with controlled sparking The power unit of the present invention provides an output voltage of a required value and polarity. By switching electro-mechanical switches connected between battery units and a solid-state switch connected to the output terminals in a specific order, n... | 05/07/1996 |
| 5506456 | Power unit with controlled output voltage The present invention is intended to provide an effective power unit with controlled output which can output graded output voltage in a wide range of required output voltages. The power unit also provides output voltage as a linear, chopped or PW modulate... | 04/09/1996 |
| 5461264 | Multi-voltage control circuit of battery or multiple independent DC power A power unit includes a plurality of substantially identical battery units connected in series and/or in parallel by respective switches. Said switches are actuated by a central control unit in accordance with requirements of a load. A solid switch member... | 10/24/1995 |
| 5449959 | Solar battery control switch output voltage adjustment circuit The present invention is to provide an effective newly designed circuit which can output graded multi-voltage, and further combine with linear or chopped solid switch member so as to attain series and parallel switch to adjust its output value when the vo... | 09/12/1995 |
