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| Number | Title | Issue Date |
| 7952230 | Cycloconverter generator In a cycloconverter generator equipped with an AC power generator that generates single-phase AC power to be supplied to a load by turning on positive and negative switching elements at variable timing every half-period of a desired AC power frequency based on a pha... | 05/31/2011 |
| 7821157 | Method and device for injecting reactive current during a mains supply voltage dip The invention relates to a method and device for injecting current during a mains supply voltage dip. The inventive method consists in permanently monitoring the magnitude and phase of the mains supply voltage and, upon detection of a voltage dip, injecting reactive... | 10/26/2010 |
| 7573155 | Systems and methods for distributing loads Systems and methods for adjusting outputs of dynamoelectric devices, such as alternators, are provided. The outputs of the dynamoelectric devices may be balanced to facilitate load sharing among the devices. The outputs may be balanced by monitoring field signals as... | 08/11/2009 |
| 7535120 | Power system with low voltage 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 ... | 05/19/2009 |
| 7210222 | Power supply control method The present invention provides a power supply control method which is executed by the electronic component mounting apparatus. A drive power source and a control power source are separately connected and shut-off in accordance with a command from a control device to... | 05/01/2007 |
| 7170262 | Variable frequency power system and method of use A variable frequency power system with a power source having a rotating output and a speed control to regulate rotational speed of the rotating output. A generator coupled to and driven by the rotating output of the power source, whereby the speed control of the pow... | 01/30/2007 |
| 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 |
| 7116003 | Aircraft starter/generator electrical system with mixed power architecture A starter/generator electrical system for gas turbine powered aircraft with mixed power architecture to combine advantages of each. The mixed power architecture may be selected from constant frequency (CF), adjustable variable frequency (AVF) and narrow range variab... | 10/03/2006 |
| 7042108 | Backup power system A backup power system is connected in parallel to a load which is powered via a power line connecting that load to a main power source, such as a utility. The backup system includes a generator/condenser unit that is coupled to a flywheel unit to maintain the flywhe... | 05/09/2006 |
| 7015598 | Power control apparatus for a bicycle A power control apparatus for a bicycle that uses a first power supply and a second power supply to provide electrical power includes a voltage sensor for sensing a voltage from the first power supply. A control unit is coupled to the voltage sensor and is coupled f... | 03/21/2006 |
| 6992403 | Electric power and start system Disclosed is a power and start system for use with an aircraft engine having a shaft, systems requiring AC power and systems requiring DC power. The system includes an AC/DC starter/generator mechanically coupled to rotate in response to rotation of the engine shaft... | 01/31/2006 |
| 6657320 | Integrated flywheel uninterruptible power supply system Integrated flywheel uninteruptible power supply (UPS) systems provide reliable back-up power protection in a single integrated housing unit. The integration of the two normally independent systems results in a synergism such that various components may be... | 12/02/2003 |
| 6281601 | Turbogenerator power control system and method The power meter, required in most utility grid connectged applications to measure load consumption, is utilized to provide a feedback to an associated turbogenerator power controller, providing a control system for peak shaving, load following, reactive p... | 08/28/2001 |
| 6094020 | Disk drive utilizing Bemf of spindle motor to increase VCM voltage during seeks A disk drive is connectable to a power supply having a fixed DC voltage. The disk drive includes a voice coil motor (VCM) and a spindle motor having a plurality of windings and a rotor rotatable at a variable spin-rate. A spindle motor driver is coupled t... | 07/25/2000 |
| 5691576 | Engine operated switch for controlling operation of electrical load responsive to alternator voltage and/or battery voltage An automated control system for controlling lights and other electrical loads in a motor vehicle is operable with an engine-driven alternator and responsive to the operation of the engine for turning on the load whenever the engine is operating or above a... | 11/25/1997 |
| 5614772 | Operating device for an electronic switching device with a changeable front foil An operating device for electronic switching devices, which operating device includes a front plate, one or more actuators applied to the from plate for the purpose of actuating one or more modules, a changeable from foil which can be applied to the front... | 03/25/1997 |
| 5563451 | Power supply apparatus installed under a platform of a vehicle A power supply apparatus comprises a generator (5) that can generate electric power used for welding, lighting, and electric tools and is installed under a load carrying platform (2) of a vehicle (1), a speed-increasing gear (3) that is installed at one s... | 10/08/1996 |
| 5459357 | Engine operated switch for controlling operation of electrical load responsive to alternator voltage and/or battery voltage An apparatus for switching on and off vehicular electrical loads. The switching of these loads is controlled automatically by sensing alternator output voltage either alone or in combination with alternator frequency and or vehicle battery voltage.... | 10/17/1995 |
| 5373196 | Combination static/dynamic inverter A power converter provides an AC output selectively using power from either a battery source or an alternator. The power converter includes a static converter (100) that is connected to receive DC from a battery (30), converting the DC to a relatively hig... | 12/13/1994 |
| 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 |
| 5300819 | Automatic power regulator for induction type biogas generator Disclosed is an automatic power regulator for controlling an induction type biogas generator via an electrically controlled governor. The biogas generator is directly coupled with a commercial AC power network. The regulator controls the power output of t... | 04/05/1994 |
| 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 |
| 5053635 | Uninterruptible power supply with a variable speed drive driving a synchronous motor/generator An uninterruptible power source is disclosed and claimed which includes a synchronous motor/generator assembly and a continuously on line variable speed drive connected to inductively accelerate the motor/generator assembly to near synchronous speed. When... | 10/01/1991 |
| 4857755 | Constant power system and method A method and system for maintaining a substantially constant output of electrical power includes an engine for operating upon receipt of a signal, an electric motor, a flywheel mounted to rotate when either the engine or the motor is operated, a generator... | 08/15/1989 |
| 4731547 | Peak power shaving apparatus and method Utility charges associated with peak electrical power demands constitute an increasing portion of utility bills associated with large commercial consumers of electricity. The instant invention provides an apparatus for reducing the peak electrical demand ... | 03/15/1988 |
| 4321478 | Auxiliary power supply with kinetic energy storage Alternating current is supplied to an auxiliary load on a transit car from a power supply comprised of a DC-energized inverter and a synchronous machine coupled to the inverter. The inverter supplies the alternating current requirements of the load up to ... | 03/23/1982 |
| 4262209 | Supplemental electrical power generating system Hydrocarbon fuel energy is converted to AC electrical energy by a new system utilized to supplement AC power for household and similar limited size loads in synchronism with existing AC utility service via pre-existing wiring between the load and the util... | 04/14/1981 |
| 4136286 | Isolated electrical power generation system with multiple isochronous, load-sharing engine-generator units An isolated electrical power generation system is described with multiple isochronous, load-sharing engine-generator units. The system includes load sensing means for generating a signal representing the individual power output of each engine-generator un... | 01/23/1979 |
| 3986038 | Sequencer unit An automatic control system for a plurality of engine-driven alternator units arranged to supply a common electrical distribution system, the system monitoring the level of the load on each generating set so that a load analogue signal corresponds to the ... | 10/12/1976 |
