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| Number | Title | Issue Date |
| 8044620 | Driving apparatus for multi-phase AC synchronous motor An inverter control circuit controls transistors based on comparison of a voltage command wave with a carrier wave, when a magnitude of a voltage vector is equal to or less than a peak value of the carrier wave. The voltage command wave is a wave, which is offset to... | 10/25/2011 |
| 7852644 | AC-DC power converter An AC-DC power converter is composed of AC input, a first rectifying circuit, a second rectifying circuit, a DC-DC converter and a DC output. The DC-DC converter has a DC input. The first rectifying circuit and the second rectifying circuit are connected in parallel... | 12/14/2010 |
| 7835165 | Power converting apparatus In a power converting apparatus in which two three-phase converters (1), (2) are operated parallel to one another, the three-phase converters (1), (2) are controlled by using d- and q-axis voltage commands. DC current sensors (26),... | 11/16/2010 |
| 7830686 | Isolated high power bi-directional DC-DC converter A bi-directional dc-dc converter is provided that may provide voltage conversion for two separate electrical power systems. The two electrical power systems may have different functions, electrical requirements and power transfer directions. The bi-directional dc-dc... | 11/09/2010 |
| 7609536 | Autotransformer AC/DC converter In an AC/DC converter including an autotransformer having a primary winding connected to an AC power supply network and two secondary windings connected to two rectifier circuits operating in parallel to deliver a DC voltage to a load, the two same-polarity outputs ... | 10/27/2009 |
| 7554824 | Multilevel converter arrangement A power loop has a power-loop emitter and a power-loop receptor located in different housings and connected via a power-loop conductor that is at least partially exterior to both housings. By means of a current transformer inductively coupling the conductor to the e... | 06/30/2009 |
| 7463499 | AC-DC power converter An AC-DC power converter is composed of AC input, a first rectifying circuit, a second rectifying circuit, a DC-DC converter and a DC output. The DC-DC converter has a DC input. The first rectifying circuit and the second rectifying circuit are connected in parallel... | 12/09/2008 |
| 7457139 | Power supply apparatus for arc-utilizing apparatuses A power supply apparatus for use with arc-utilizing apparatuses includes a plurality of power supply blocks of the same capacity. Each power supply block includes an input-side rectifying circuit, an inverter, a transformer, and an output-side rectifying circuit. Th... | 11/25/2008 |
| 7362596 | Transformer balance circuit A balancing circuit for systems having at least first and second transformers. The transformers' primary sides are connected to one another. The transformers' secondary sides also are connected to one another. The balancing circuit includes a branch connecting one t... | 04/22/2008 |
| 7301301 | Electric car control apparatus In an electric car control apparatus for driving an induction motor, detection accuracy of a DC voltage is improved. A DC power supply device is provided which has a maximum potential terminal A, an intermediate potential terminal B, a minimum potential terminal C, ... | 11/27/2007 |
| 7235891 | Power system having generator driven by engine An apparatus for controlling the operation of power conditioners (10) for supplying the generated power to an external power system such as a commercial power system, in which power conditioners (10) are interconnected to an external power system, the ... | 06/26/2007 |
| 7190601 | Pulse-width modulation method for a frequency converter A space-vector pulse-width modulation method for a frequency converter provided with a voltage intermediate circuit, said frequency converter comprising a mains bridge (10) to be connected to an alternating current source (UU, UV, U... | 03/13/2007 |
| 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 |
| 7187565 | High voltage power supply A high voltage power supply (HVPS) including an oscillation circuit for generating and outputting an alternating current (AC) voltage using an oscillation of a transformer, and a voltage multiplying circuit for increasing the AC voltage from the oscillation circuit ... | 03/06/2007 |
| 7170194 | Configurable multiple power source system A system for supplying additional power to a module having an internal power supply, the system comprising: a module having an associated power supply, the power supply not being designed to accommodate power sharing; at least one load associated with the module, th... | 01/30/2007 |
| 7164254 | Modulation methods and apparatus for reducing common mode voltages Methods and apparatus for reducing the common mode voltage generated by eliminating zero-voltage vectors in a rectifier/inverter variable frequency drive (VFD) system includes comparing three phase voltages to each other to determine a maximum voltage in one phase, ... | 01/16/2007 |
| 7157885 | Inverter controlled generator set and method for controlling the same A method for controlling an inverter controlled generator set which comprises a DC power source section having as a power source a generator driven by an engine and an inverter which converts an output of said DC power source section into an AC output, the method co... | 01/02/2007 |
| 7154237 | Unified power control method of double-ended inverter drive systems for hybrid vehicles A method of providing a unified power control of a motor including providing a first inverter system, a second inverter system, and a motor coupled therebetween; coupling the first inverter system coupled to a first energy source; coupling the second inverter system... | 12/26/2006 |
| 7145785 | Switching power supply circuit A power supply circuit is disclosed which performs constant voltage control by switching frequency control and is ready for a wide range while the necessary control range of the switching frequency control is reduced. The circuit includes a primary side series reson... | 12/05/2006 |
| 7146258 | Direct current power pooling The present invention provides for a DC power pooling system comprising: a plurality of DC electrical power consuming and providing entities, each of the plurality of DC electrical power consuming and providing entities having at least a first operative mode in whic... | 12/05/2006 |
| 7142951 | Direct current power pooling for an ethernet network The present invention provides for a DC power pooling system for an Ethernet network comprising: a plurality of DC electrical power consuming and providing Ethernet nodes, each of the plurality of DC electrical power consuming and providing Ethernet nodes having at ... | 11/28/2006 |
| 7142438 | Extended output range switching power supply with constant power feature The Invention is a 360 watt bench has an exceptionally wide output range that allows it to replace up to four conventional units. The output voltage can be manually adjusted with coarse and fine controls from zero to 75 volts. At the low voltage end, 60 amps of outp... | 11/28/2006 |
| 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 |
| 7112946 | Transformer with selectable input to output phase angle relationship A three-input induction transformer in which the phase relationship of the power output relative to the power input is selectable/adjustable after the transformer is placed in operation in the field. The transformer includes a primary set of windings and a three-pol... | 09/26/2006 |
| 7079403 | Isolated DC-DC converters One DC-DC converter includes primary side circuit between high and low side inputs including first primary winding of first transformer, and auxiliary section; and rectifier circuits, with separate secondary windings of first transformer, and in parallel with one an... | 07/18/2006 |
| 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 |
| 7061733 | Power supply cut-off device for a power rectifier A power supply cut-off circuit for breaking a connection between a power rectifier and a power supply line leading to a load. The cut-off circuit is adapted to be connected between the power rectifier and the power supply line and includes a switching circuit connec... | 06/13/2006 |
| 7044393 | Semiconductor integrated circuit device and contactless IC card A semiconductor integrated circuit device (IC) and a contactless IC card including a receiver circuit that is able to stably demodulate information signals superimposed on AC signals from an interrogator. The receiver circuit included in the IC is equipped with ante... | 05/16/2006 |
| 7038923 | Method of establishing a master & minus; host in modules connecting in parallel This invention relates to a method of establishing a master unit in a multi-unit parallel system. Each module with a respective number is connected through a bus, and has a different host-identifying pulse width Ts and a host-releasing pulse width Tw. According to t... | 05/02/2006 |
| 7030587 | Configuration of converter switches and machine coils of a switched reluctance machine A system for controlling a switch reluctance machine is provided. The system includes multiple phases located in the switch reluctance machine, each phase having multiple machine coils. Each machine coil is independently connected to a positive side switch circuit a... | 04/18/2006 |
| 7012823 | Method and control system employing conduction monitors for detecting unbalanced current condition of alternating current phases A method controls and monitors a parallel array of a plurality of rectifier bridges each of which is adapted to convert a plurality of alternating current voltages of a plurality of alternating current phases to a voltage. The bridges include a plurality of segments... | 03/14/2006 |
| 7012409 | Power converter circuit and associated triggering method for generators with dynamically variable power output A power converter circuit and associated triggering method for connecting a three-phase generator to an electrical network. The circuit includes a first direct connection of the generator to the network and a second connection of the generator to the network, throug... | 03/14/2006 |
| 6967854 | Configurable power supply system for machine components The invention provides a power supply system and a method for providing a power supply for a machine having a plurality of components. The system comprises a power source and a set of two or more voltage converters connected in parallel and coupled to the power sour... | 11/22/2005 |
| 6950322 | Regulated AC to DC converter for aerospace applications In high-efficiency power source applications, AC power is converted to DC power, which is isolated from the source and regulated. A level of performance is achieved that exceeds the power quality requirements of MIL-STD-704 over the extended frequency range, typical... | 09/27/2005 |
| 6936999 | System and method for controlling output-timing parameters of power converters A system and method is provided for utilizing output-timing data to control at least one output timing parameter of a point-of-load (“POL”) regulator. Specifically, a power supply controller (“controller”) is adapted to transmit output-timing data to at leas... | 08/30/2005 |
| 6903947 | Power supply with a reduced harmonic load on the mains system, and a corresponding appliance The power supply according to the invention has a first switched-mode power supply and a second switched-mode power supply, which is connected in parallel with the first, and with both switched-mode power supplies having power factor correction. In this case, the fi... | 06/07/2005 |
| 6859374 | Method in connection with converter bridges A method in connection with converter bridges connected in parallel, whereby the converter bridges are directly connected in parallel and the converter bridges are controlled independently on the basis of control variables, the method comprising the steps of control... | 02/22/2005 |
| 6853167 | Power supply system A power supply unit includes a plurality of power trains and a control assembly. Each power train includes a power factor correction circuit that receives an AC input and generates a first DC output, and a DC/DC converter circuit that receives the first DC output an... | 02/08/2005 |
| 6771519 | Method and apparatus for generating high voltage A power supply is described that comprises two or more flyback-type, DC-to-DC converters having substantially the same periods for their respective charge-discharge cycles; inputs from a common power source; outputs that are connected to a common output node and cir... | 08/03/2004 |
| 6738270 | Parallel power source system Disclosed is a parallel power source system which has a plurality of power supply units connected in parallel to one another and is designed in such a way that a voltage loss in an inverse-current preventing circuit provided in each power supply unit is reduced, the... | 05/18/2004 |
