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| Number | Title | Issue Date |
| 7482710 | Power generation system and control method A power generation system includes a first unit power generation system having a storage battery, a second unit power generation system having no storage battery and a controller, at a time of starting up of the power generation system, the controller first starts u... | 01/27/2009 |
| 7358620 | Methods and apparatus for ride-through operation of a complementary device to a transient power source In accordance with certain exemplary embodiments, the present technique provides methods and apparatus for providing operating power to a complementary device to an induction device based uninterruptible power source (UPS) via a direct current (dc) bus. In one embod... | 04/15/2008 |
| 7319307 | Power balancing of multiple synchronized generators Power balancing techniques for a synchronous power generation system are provided. One exemplary method for balancing power in a synchronous generator system includes determining an output power characteristic of a synchronous generator driven by a prime mover and c... | 01/15/2008 |
| 7317259 | Power output apparatus and motor vehicle equipped with power output apparatus A motor (MG1) is connected to a sun gear (31) of a first planetary gear (P1) of a power distribution/unification mechanism (30), an engine (EG1) is connected to a carrier (34) of the first planetary gear (P1) and a ri... | 01/08/2008 |
| 7304445 | Locomotive power train architecture The present invention is directed to a power control architecture for a vehicle, particularly a locomotive, in which a number of energy sources are connected to a common electrical bus and selectively provide energy to the bus based on the relationship between their... | 12/04/2007 |
| 7233129 | Generator with utility fault ride-through capability A wind powered turbine with low voltage ride-through capability. An inverter is connected to the output of a turbine generator. The generator output is conditioned by the inverter resulting in an output voltage and current at a frequency and phase angle appropriate ... | 06/19/2007 |
| 7155912 | Method and apparatus for storing and using energy to reduce the end-user cost of energy The invention relates to an energy storing method and apparatus for use by end-users of energy, such as commercial property owners and operators. The system differs from past systems, insofar as it is not intended to be used by and in connection with energy supplier... | 01/02/2007 |
| 7129593 | Low-energy storage fast-start uninterruptible power supply method An uninterruptible power supply system has standby and backup modes and can change to backup mode upon detection of a grid fault. In both modes an alternator rotates at synchronous speed so that backup mode capability is ready. An energy storage unit through a DC-AC... | 10/31/2006 |
| 7088027 | Rotating asynchronous converter and a generator device The present invention relates to a rotating asynchronous converter and a generator device. The converter comprises a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC network with a second... | 08/08/2006 |
| 7081734 | Ride-through method and system for HVACandR chillers A method of providing ride-through capability in a chiller/refrigeration system employs a variable speed drive with an active converter stage, a DC link stage and an inverter stage for providing variable frequency and voltage to power at least one motor. An inductio... | 07/25/2006 |
| 7078825 | Microturbine engine system having stand-alone and grid-parallel operating modes A microturbine engine that includes a compressor that is operable to provide a flow of compressed air. The compressed air flows through a recuperator where it is preheated before delivery to a combustor. The preheated compressed air mixes with a fuel and is combuste... | 07/18/2006 |
| 7071581 | Uninterruptible power supply system using a slip-ring, wound-rotor-type induction machine and a method for flywheel energy storage Several embodiments of an uninterruptible power supply (UPS) system, which system provides highly reliable output power to a load using a slip-ring induction machine and a flywheel combination, are disclosed as well as methods relating thereto. In a preferred embodi... | 07/04/2006 |
| 7068014 | Online alternator flywheel system A flywheel energy storage system for preventing power interruptions to a load from interruptions of primary power includes a flywheel supported for rotation about an axis on a bearing system, and a motor-generator having a rotor coupled with the flywheel, and having... | 06/27/2006 |
| 7064458 | Method and system for transferring a load between AC voltage sources A method and system for transferring a load from a first AC voltage source to a second AC voltage source. A temporary voltage source is connected to the load and to the first voltage source via a resistor. The first voltage source is disconnected from the load. The ... | 06/20/2006 |
| 7045913 | Microturbine engine system A microturbine engine that includes a compressor that is operable to provide a flow of compressed air. The compressed air flows through a recuperator where it is preheated before delivery to a combustor. The preheated compressed air mixes with a fuel and is combuste... | 05/16/2006 |
| 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 |
| 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 |
| 7019483 | Devices for position-controlled stopping of rotating components with position-controlled drive mechanisms in the case of voltage loss The position-controlled stopping of rotating components of shaftless drive mechanisms, in the case of a loss of voltage, is accomplished by the provision of an external connectable network. That external connectable network supplies the process power which is missin... | 03/28/2006 |
| 6960843 | Parallel operating system for uninterruptible power units A system for operating in parallel plural non-break power units, each unit including an inverter inserted between an input power source and a parallel bus and an AC switch inserted between the bypass power source and the parallel bus and having an inverter power sup... | 11/01/2005 |
| 6943531 | Portable power supply incorporating a generator driven by an engine A portable power supply includes an engine-driven generator that generates a first AC power. A rectifier rectifies the first AC power to a first DC power. A DC/DC converter converts a second DC power from a storage unit to a third DC power. A controller selectively ... | 09/13/2005 |
| 6933627 | High efficiency lighting system A high efficiency lighting system maintains normal lighting conditions by lighting fixtures requiring DC electrical power. A power control device receives AC electrical power from a public utility converts AC power to DC power and delivers low voltage DC electrical ... | 08/23/2005 |
| 6927499 | Power generator and system comprising it A control unit (5) for controlling each device which constitutes a electric power generator set (1) is provided with an operation-and-display device (28) so constituted as to calculate each electric power value data and each electric energy data... | 08/09/2005 |
| 6788029 | Flywheel with switched coupling regulator A flywheel energy storage device, for producing electrical power in an allowable range of operating voltages for an output load, includes an energy storage flywheel supported for rotation on a bearing system, and a brushless motor and a brushless permanent magnet ge... | 09/07/2004 |
| 6624533 | Controlling generator power A power controller for controlling an engine-driven generator includes a high voltage DC bus interconnecting various power modules. In electrical communication with the DC bus are: a bi-directional DC-DC converter constructed to transfer electrical power ... | 09/23/2003 |
| 6559559 | Power system utilizing a DC bus An exemplary embodiment of the invention is a power system including a first power source, a first DC bus coupled to the first power source and a second DC bus coupled to the first power source. A power conditioning device is coupled to the first DC bus a... | 05/06/2003 |
| 6198176 | UPS/CPS system An improved UPS/CPS system employs a high-efficiency uninterrupted power supply function integrated with an engine-generator set that combines both short term protection against momentary power interruptions with longer term power generation. Feedback fro... | 03/06/2001 |
| 6177738 | Isolated electrical system including asynchronous machine with prime mover and inverter/rectifier An electrical system for use in isolation, the electrical system comprising a main engine (14), such as a gas turbine or a diesel engine, a generator (13) driven by the main engine (14) for generating a first alternating voltage (19), a first rectifier un... | 01/23/2001 |
| 6175311 | On-line UPS controllable from far end An ON-LINE uninterrupted power supply (UPS) of this invention serving as a long term high quality power supply for web, telecommunication, security system, etc is characterized in detecting a ring signal from far end for ON/OFF control of an output power ... | 01/16/2001 |
| 6114775 | Control system of auxiliary power system for a hybrid electric vehicle The present invention relates to a control system of an auxiliary power system for a hybrid electric vehicle in which a circuit of the control system of the auxiliary power system is constructed by a digital method. The control system has a function for m... | 09/05/2000 |
| 6023152 | System for stabilizing a power supply system In order to provide a system for stabilizing a power supply system comprising a choke, which connects the power supply system to a mains power feed, a converter system connected to the power supply system and having a converter machine with a rotor and at... | 02/08/2000 |
| 6020657 | Power supply for providing instantaneous energy during utility power outages A power supply system and method provides for smooth transitions between a utility power, transitory instantaneous power, and backup power in the event of a utility power failure of a utility supplying power to a load. As the utility power weakens due to ... | 02/01/2000 |
| 5994794 | Methods and apparatus for providing protection to batteries in an uninterruptible power supply An uninterruptible power supply (UPS) provides improved reliability by extending the useful life of a bank of batteries that provide backup power to the UPS in the event of an extended power outage. In the preferred embodiment, battery life is extended by... | 11/30/1999 |
| 5880537 | Uninterruptable power supply An uninterruptable power supply, operating normally under power supplied by a utility, has a main motor, a smaller induction motor, and a mechanical load such as a generator coaxially coupled together. A battery is connected to the smaller induction motor... | 03/09/1999 |
| 5844329 | System and method for providing uninterrupted power to on board electrical equipment A craft, such as an aircraft, landcraft, watercraft, space craft, or the like, is provided with a power transfer system which ensures an uninterrupted supply of electrical power to on board electrical equipment during normal switching from one power suppl... | 12/01/1998 |
| 5811960 | Battery-less uninterruptable sequel power supply A battery-less uninterruptable sequel power supply that converts mechanical rotation generated by a local power source to electrical power in the event of commercial line power distortion or failure is provided. The uninterruptable sequel power supply use... | 09/22/1998 |
| 5646458 | Uninterruptible power system with a flywheel-driven source of standby power An UPS (uninterruptible power system) includes an UPS power conditioning unit that provides conditioned AC power to a critical load. The UPS power conditioning unit includes a variable speed drive that operates in response to AC utility power or to a stan... | 07/08/1997 |
| 5373198 | Uninterrupted electric feed system with unlimited autonomy without electric accumulators The system ensures electric feed for which purpose it has an alternating current motor (1) coupled to an alternator (2) which is coupled to a hydraulic motor (8) which in turn is coupled to a diesel engine (7.) The alternating current motor is coupled by means... | 12/13/1994 |
| 5198698 | Auxiliary power supply system for providing DC power on demand An auxiliary power supply system includes an internal combustion engine driving an alternator the output of which is rectified and supplied to DC bus lines across which a storage battery is connected. The DC bus lines may supply a consuming device such as... | 03/30/1993 |
| 5194757 | Uninterruptible power supply Each of at least two asynchronous generators connected to a common electrical load for uninterruptibility of the power supply is driven by a corresponding one of at least two drives in such a way that when any one of the generators is driven above synchro... | 03/16/1993 |
| 5081368 | Uninterruptible power supply with a variable speed drive driving an induction motor/generator An uninterruptible power source includes an induction motor/generator assembly and a continuously on line variable speed drive connected to inductively accelerate the motor/generator assembly to near rated speed. When the motor/generator assembly reaches ... | 01/14/1992 |
