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| Number | Title | Issue Date |
| 7423411 | Resistive torsional mode damping system and method A resistive torsional mode damping system for a shaft of a machine includes: a sensor configured for sensing a signal representative of torque on the shaft; a controller configured for using the sensed signal for detecting a presence of a torsional vibration on the ... | 09/09/2008 |
| 7352157 | Voltage regulator with improved protection and warning system This invention discloses a vehicle electrical system voltage regulator with improved electrical protection and warning means that discerns and responds to regulator, generator, or vehicle electrical system operation and malfunctions. The regulator includes monitorin... | 04/01/2008 |
| 7345456 | Power system stabilizer providing excitation limiter functions A stabilizer and synchronous electric power generator system using same that provides both power system damping and excitation limiter functionality. The stabilizer includes a processing unit and a memory storing routines executable by the processing unit. The routi... | 03/18/2008 |
| 7332894 | Power generation apparatus using AC energization synchronous generator and method of controlling the same In a power generation apparatus equipped with an AC energization synchronous generator, when energization of a secondary winding starts to conduct connecting to the network of the AC energization synchronous generator to a network voltage, energization of the second... | 02/19/2008 |
| 7327061 | AC generator and method One aspect of the invention is a generator with at least two commutators mounted on a rotatable shaft. At least two magnetically conductive bars may be mounted in an opposed relationship with at least one of the bars passing through a wire coil. At least two magnets... | 02/05/2008 |
| 7321209 | Power buffering for rotating media storage devices A method and system for buffering power for rotating media devices. A power management circuit includes a power augmentation circuit and a power storage device. The power augmentation circuit is arranged to sense when the storage device motor is accelerating and to ... | 01/22/2008 |
| 7315149 | Vehicle generator The vehicle generator includes a rotor around which a field winding is wound, a stator around which an armature winding is wound, a rectifier rectifying an AC voltage induced in the armature winding to generate a DC output current. The rectifier has a plurality of r... | 01/01/2008 |
| 7282893 | Method and apparatus for generator control A generator control circuit is provided that includes a first circuit (44) monitoring a generator voltage change rate and producing a first output when the voltage change rate is above a first level, a second circuit (48) monitoring a generator current... | 10/16/2007 |
| 7256511 | Turbine-generator equipment and installation method thereof Installation method of turbine-generator equipment controlling a turbine-generator is described. The method includes manufacturing a thyristor excitation equipment as a package including a circuit breaker, an excitation transformer, a power rectifier coupled with th... | 08/14/2007 |
| 7256506 | Backup power hierarchy for a facility system A system is disclosed which accomplishes a method of providing backup power to a device in a facility. The method includes using turbines to combusting a fuel to generate a primary power source. If this source fails, a secondary source of power is obtained from a co... | 08/14/2007 |
| 7245032 | Mobile-power system utilizing propane generator, fuel cell and super capacitors The present invention is a mobile-energy generating system capable of providing redundant direct current power. It comprises a reciprocating engine and generator having dual fuel capability, a fuel cell, commercial electrical power hookups, and capacitors used for b... | 07/17/2007 |
| 7242104 | Power system for a telecommunication facility Disclosed is a method of supplying DC power to equipment using proton exchange membranes (PEMs). PEMs run on hydrogen to produce DC electrical power. In the disclosed embodiment these PEMs are used as an alternative source of power to AC sources. One of these other ... | 07/10/2007 |
| 7239113 | Method for reducing undesired currents in an electrical power generation system An electrical power generation system is provided, and a method of reducing undesired currents therein. The method includes the steps of delivering current via at least one variable frequency switching means, and adjusting a switching frequency of the at least one v... | 07/03/2007 |
| 7224148 | Vehicle power-generation control unit The vehicle power-generation control unit includes a voltage detecting circuit detecting a generation voltage of a vehicle generator driven by a vehicle engine, a switching device allowing an exciting current to flow into an exciting winding of the vehicle generator... | 05/29/2007 |
| 7215099 | Method in frequency converter provided with voltage intermediate circuit, and frequency converter A method in a frequency converter provided with a voltage intermediate circuit in connection with interference in a network (5) to be supplied and a frequency converter (2), which comprises a network converter part (4) and an inverter part (3... | 05/08/2007 |
| 7183750 | Vehicle power-generation control unit and vehicle power-generation control system The vehicle power-generation control unit has a first function enabled when a control signal received from outside designates a first mode to control an exciting current such that an output power of a vehicle generator is kept at a value specified by the control sig... | 02/27/2007 |
| 7151359 | Variable reluctance generator A variable reluctance generator has phase windings and a bias winding. By controlling the excitation produced by the bias winding, the speed of the machine or the DC link, a power converter using only diodes can supply power to a DC bus. A method of operating a vari... | 12/19/2006 |
| 7135784 | Fast torque control of a belted alternator starter A belted-alternator starter system that continuously provides pre-flux when the vehicle ignition is on and the engine is off to provide a faster torque response when the engine is turned on. The alternator/starter device operates as an alternator for providing elect... | 11/14/2006 |
| 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 |
| 7106029 | Vehicle generator and vehicle generating system A vehicle generating system includes a generator for a vehicle, a voltage regulator that supplies field current to the field coil at a variable duty ratio, a field current sensor that detects field current amount, a signal transmitting circuit that transmits a signa... | 09/12/2006 |
| 7091625 | Home-use fuel cell system During a time zone where a power demand is smaller than an average value of the entire power demands of homes, an excess portion obtained by subtracting a power demand from a base power portion supplied by PEFC (1) is charged in a capacitor (7) and a l... | 08/15/2006 |
| 7088065 | Drive unit and vehicle equipped therewith A drive unit of the invention comprises a motor that can input/output motive power to/from a drive shaft, a drive circuit that performs drive control of the motor, a fuel cell that is connected to the drive circuit without the intervention of a voltage converter suc... | 08/08/2006 |
| 7087332 | Power slope targeting for DC generators A simple feedback control loop, in conjunction with an improved maximum power point tracking intermediate controller, can be used ensure efficient operation of a power generator. The improved maximum power point tracking controller operates the generator at its maxi... | 08/08/2006 |
| 7084609 | Alternator controlled rectifier A system and method for controlling the voltage output of an alternator is disclosed. The system includes an alternator having a rotor, which has a field winding, a stator having a plurality of phases, a rectifier bridge connected to the plurality of phases, at leas... | 08/01/2006 |
| 7084600 | Power control apparatus for a turbo charger equipped with an assist motor and a motor driven turbo charging apparatus A power control apparatus includes an inverter giving a rectangular waveform drive signal to an induction motor, an inverter voltage controlling section controlling an output voltage of the inverter, a converter boosting a voltage supplied to the inverter, a convert... | 08/01/2006 |
| 7075272 | Control device for vehicle AC generator In a control apparatus of a vehicle AC generator, a flip-flop for receiving a clock pulse with a constant period and a control pulse is used. The clock pulse sets the control period at the constant period, and decides an on timing of the power transistor in this con... | 07/11/2006 |
| 7049778 | Inverter control apparatus and inverter control method An interrupt signal is generated at each of rising timings of PWM signals which are produced on the basis of phase-shifted triangular wave carrier signals for phases, and voltage command values for the phases. At timings of the interrupt signals, A/D conversion of m... | 05/23/2006 |
| 7049771 | Multi-phase carrier signal generator and multi-phase carrier signal generation method A carrier signal generation section is provided for each of U, V, and W phases, and each of the carrier signal generation sections has an up-down counter for counting clock signals output from a clock generator. An initial value is set for each of the up-down counte... | 05/23/2006 |
| 7045991 | Maximum power follow-up control apparatus A power conditioner 10 is provided with a maximum power follow-up control portion 12 for setting a DC operating voltage of a power converter 11, which converts output power of a power generator 2 into AC power, for making a power point co... | 05/16/2006 |
| 7038330 | Protection for wind power station A wind power station comprises a wind rotor; a transmission mechanically coupled to the wind rotor; an asynchronous generator having a generator rotor mechanically coupled to the transmission, and a generator stator electrically coupled to a power grid; and a protec... | 05/02/2006 |
| 7030593 | Multiple path variable speed constant frequency device having automatic power path selection capability The present invention relates to variable speed constant frequency (VSCF) devices and methods for maximizing engine generator efficiency. In one embodiment, a VSCF device may include at least two paths for conducting power to the load. One path, a line inductor path... | 04/18/2006 |
| 7019496 | Demand responsive power generation system A method and apparatus for generating power in a demand responsive manner is disclosed. The apparatus includes a controller monitoring power demand conditions to determine activation of an energy delivery system. The energy delivery system responds to the controller... | 03/28/2006 |
| 6995545 | Control system for a sputtering system A fault handling algorithm processes a plurality of fault status signals from a sputtering system in a period of time to generate at least one command signal for affecting the operation of a power generator. ... | 02/07/2006 |
| 6995544 | Generator control apparatus An IC regulator for controlling an alternator by changing contents of control in dependence on ambient temperature includes a control voltage limiter (2), a field current controller (3), a temperature sensor (4), a first comparator (5) fo... | 02/07/2006 |
| 6975080 | Rotating electrical machine for vehicle A rotating electrical machine for a vehicle is capable of improving the acceleration performance and the fuel mileage of the vehicle while achieving the prevention of occurrence of overvoltage and the improvement of its power generation characteristic at the same ti... | 12/13/2005 |
| 6965818 | Mobile energy management system A recreational vehicle includes a chassis having a living space, an electrical system for providing electrical power to the living space, an air conditioner for cooling the living space, a heater for heating the living space, and a plurality of appliances within the... | 11/15/2005 |
| 6953100 | Method and apparatus to regulate the supply of power to an electric drive using a hybrid energy supply system in a vehicle Regulation of energy supplied to an electric motor from an energy supply system including a fuel cell and an energy storage buffer such as a battery, improves the dynamic response of the motor by adding current from the energy storage buffer to the current from the ... | 10/11/2005 |
| 6954052 | Control apparatus and control method of generator for vehicle An electronic control apparatus includes target FR calculator that calculates a target exciting current duty ratio FR based on an exciting current inputted from FR terminal of a regulator and flowing through field coil, and information of engine operating conditions... | 10/11/2005 |
| 6924627 | Method of reactive power regulation and aparatus for producing electrical energy in an electrical network A method of reactive power regulation in an electrical network in which electrical power is produced by an electrical generator preferably driven by the rotor of a wind power installation and suitably modulated by means of a compensation device between the generator... | 08/02/2005 |
| 6919712 | Excitation control device and excitation control method A reference voltage of an output terminal of a synchronous machine is set according to a reactive current output from the synchronous machine, a reference voltage of the high voltage side of a transformer, and a phase compensation transfer function to quicken attenu... | 07/19/2005 |
