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| Number | Title | Issue Date |
| 8054657 | Static converter A static converter includes a current converter on the three-phase side and a current converter on the single-phase side, which are electrically conductively linked to one another on the DC voltage side, and which are respectively electrically conductively connected... | 11/08/2011 |
| 7609534 | Operating a three phase device using single phase power A powering arrangement (32, 34) for a device (30, 22) that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes estimating a direct component based upon a measured voltag... | 10/27/2009 |
| 7495936 | Three-phase voltage-fed AC/DC converter A three-phase voltage-fed AC/DC converter includes a conversion circuit which converts power from a DC voltage source to three-phase AC power. The converter further includes a UM conversion circuit which carries out dq conversion of the three-phase output voltage, a... | 02/24/2009 |
| 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 |
| 7414870 | Inverter An inverter includes an intermediate circuit, inverter bridge branches downstream of the intermediate circuit for outputting a power signal, and a controller operable for individually turning on and off the inverter bridge branches. The controller may individually t... | 08/19/2008 |
| 7355296 | Wind turbine generator system To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel ... | 04/08/2008 |
| 7330011 | Motor driving apparatus A motor driving apparatus includes an inverter circuit for converting an output of a rectifier circuit connected to a single-phase AC power supply into a driving voltage, and outputting the driving voltage to a brushless motor, and an inverter control unit for contr... | 02/12/2008 |
| 7280377 | Power converter in a utility interactive system Consistent with an aspect of the present disclosure, a backup fuel cell, for example, is coupled to a utility power grid, through a power conversion circuit. The power conversion circuit may include an inverter circuit, pulse generating circuit and control circuit. ... | 10/09/2007 |
| 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 |
| 7212063 | Half-bridge circuit with phase output A half-bridge circuit, in which an input signal that is applied between two input terminals can be picked up at a phase output comprises two switching transistors controlled by a respective control signal that is applied between a control electrode and an auxiliary ... | 05/01/2007 |
| 7211984 | Start-up and restart of interior permanent magnet machines A method of starting a permanent magnet machine. A machine stator voltage in a stationary reference frame is sensed. An initial speed of a rotor of the machine is estimated based on the sensed voltage, and state variables of control algorithms are initialized based ... | 05/01/2007 |
| 7205676 | Wind turbine generator system To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel ... | 04/17/2007 |
| 7170261 | Generator with dual cycloconverter for 120/240 VAC operation A generator system has two modes of operation, such as 120 VAC and 240/120 VAC. The generator system has a permanent magnet generator with two independent sets of windings that each generate a three phase AC voltage. One three phase AC voltage is coupled to a first ... | 01/30/2007 |
| 7164252 | Electrically powered hand tool An electrically powered hand tool is described and which includes a three phase electrical motor having a plurality of poles; an electrical motor drive electrically coupled with the three phase electrical motor; and a source of electrical power which is converted to... | 01/16/2007 |
| 7102331 | Generator with dual cycloconverter for 120/240 VAC operation A generator system in accordance with the invention has two modes of operation, such as 120 VAC and 240/120 VAC modes of operation. The generator system has a permanent magnet generator with two independent sets of windings that each generate a three phase AC voltag... | 09/05/2006 |
| 7102327 | Motor current reconstruction via DC bus current measurement A technique for reconstructing phase currents based on measurements of a DC bus current. Non-observable regions of DC bus current samples to reconstruct phase currents are reduced in size by using two phase space vector modulation. The non-observable regions can be ... | 09/05/2006 |
| 7075193 | Power factor correcting circuit for uninterrupted power supply This invention relates to a PFC circuit for an uninterrupted power supply. Such a PFC circuit includes a first converter, a second converter, an energy storing branch composed of two capacitors in series, and a controller. Each of the first and the second converters... | 07/11/2006 |
| 7075268 | System and method for increasing output horsepower and efficiency in a motor A system and method are provided to increase the horsepower of an induction motor. One technique for increasing the horsepower of a motor is to connect the motor to a variable speed drive that is providing an output voltage and frequency greater than the standard li... | 07/11/2006 |
| 7068015 | Wind power plant having magnetic field adjustment according to rotation speed A wind power plant where the driving shaft communicates with a synchronous generator (3) optionally through a gear (2) and with a transformer, if any, communicating through an AC/DC inverter 7 with an HVDC transmission cable 9. The synchr... | 06/27/2006 |
| 7053590 | Power generating system including a high-frequency alternator, a rectifier module, and an auxiliary power supply A power generating system includes a high-frequency alternator, a rectifier, a capacitor in each phase line extending between an output terminal of the alternator and the rectifier, and an auxiliary power supply, providing auxiliary power for use within the power ge... | 05/30/2006 |
| 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 |
| 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 |
| 6992465 | Generator control circuit having alarm controller A generator control circuit of an ac generator which charges a battery includes a voltage regulator, a comparator which provides a control signal for controlling the voltage regulator when the output voltage of the ac generator is higher than a predetermined voltage... | 01/31/2006 |
| 6937484 | Inverter controlled generator apparatus A plurality of control power sources of voltage specifications different from one another are constructed. A generator output converted by a converter into a DC current is converted by an inverter into an AC current of a predetermined frequency. The generation outpu... | 08/30/2005 |
| 6933704 | Slip-inducing rotation starting exciter for turbine generator A dynamoelectric machine combining the functions of an exciter, a turning motor, and a starting motor for a turbine. The machine operates in a first mode where the slip between a first stator winding and a first armature winding is positive and thus the magnetic fie... | 08/23/2005 |
| 6864660 | Method and device for controlling an electric load connected to a multiphase switchable DC/AC frequency convertor A method and a device for realizing an effective value of a quantity to be varied in an electrical load connected to a multi-phase switchable DC/AC frequency convertor comprising a plurality of controllable switches. The value is realized by varying a current or a v... | 03/08/2005 |
| 6831849 | Conversion of single phase to multiple phase alternating current A system for controlling multiple vehicle includes a twelve volt (12V)/forty-two volt (42V) battery power distribution system that provides direct current. The system converts single phase alternating current to multiple phase alternating current to simultaneously p... | 12/14/2004 |
| 6531843 | Driving system of AC motor The present invention provides a control algorithm which instantaneously detects magnetic pole positions in the inside of a motor including polarities of the motor. A controller 1 applies a minute voltage change vhd to a voltage command on a dc axis which... | 03/11/2003 |
| 6452586 | Computer input device providing tactile feedback An input device for a computer system includes a housing and an output circuit located in the housing. The output circuit is capable of providing an output signal to the computer system that is indicative of movement of at least a portion of the input dev... | 09/17/2002 |
| 6388903 | Voltage compensating apparatus and method for 3-phase inverter employing four switches Disclosed are a voltage compensating apparatus and method for a 3-phase inverter using four switches, to compensate for a severe distortion of a 3-phase application voltage due to a voltage ripple. The voltage compensating apparatus includes upper and low... | 05/14/2002 |
| 6297971 | Phase converter A phase converter that converts single phase AC electric power to balanced three phase AC power. Two input terminal connected to the output of a single phase AC power source connect directly to two output terminals of the converter. The phase converter ha... | 10/02/2001 |
| 6278622 | Electric power source apparatus including electric power converter circuit and method for controlling the same A method of controlling an electric power source apparatus including an electric power converter circuit which converts an output of an electric power source into DC or AC output and load connector terminals across which is applied an output of said conve... | 08/21/2001 |
| 6061256 | Apparatus for conversion of a three-phase voltage into an isolated DC voltage An apparatus for conversion of a three-phase voltage system into an electrically isolated DC voltage to be predetermined freely, and a method for controlling the same, include primary and secondary circuits. Each phase of the primary circuit has a series ... | 05/09/2000 |
| 6052293 | Converter device for connection between a single-phase side on a single or multi-phase side A device for converting current and voltage between a first single-phase side and a second single- or multi-phase side is provided. At least two converter modules are connected between these sides. Each converter module has two converters interacting with... | 04/18/2000 |
| 6005783 | Method of synthesizing poly-phase AC voltage A three-phase invertor and control is disclosed for synthesizing low harmonic content AC voltage in the non-linear, or overmodulation, region of inverter operation. A field orientation control provides a reference voltage vector representing the desired A... | 12/21/1999 |
| 5994869 | Power conversion circuit for a motor A motor system and method providing improved power factor and harmonic control of power supplied to a motor. The system and method employs a power conversion circuit connected to an AC voltage source for supplying power to a power supply link of the motor... | 11/30/1999 |
| 5969957 | Single phase to three phase converter A converter for providing three phase power to a three phase load from a single phase supply includes an inverter connected to single phase input power lines and a bi-directional switch connected in series with one of the input power lines. The converter ... | 10/19/1999 |
| 5969510 | Three-phase to six-phase wye transformer power system The present invention discloses a method for providing balanced power to a single-phase ac load from a three-phase ac power source. The method includes imposing an isolation power transformer between the ac power source and the load wherein the isolation ... | 10/19/1999 |
| 5892667 | Symmetrical power system A symmetrical ac power system provides a balanced ac output, whose maximum voltage with respect to a reference ground potential is one-half the ac output voltage, and which is derived from a single phase ac source through the use of an isolation transform... | 04/06/1999 |
| 5793623 | Air conditioning device An air conditioning device is arranged such that an output voltage from a commercial power source is converted into a direct current by a rectifying circuit and a smoothing condenser. Thereafter, it is further converted into an AC voltage having a variabl... | 08/11/1998 |
