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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7408268 | Anti-islanding method and system for distributed power generation systems An electrical power supply system connected to an electrical grid, includes at least one source of electrical power, an inverter which receives power from the electrical source and delivers power to a local load, and a connection to the electrical grid. The system a... | 08/05/2008 |
| 7365518 | Ion engine power supply A power supply for an ion engine comprises a multiphase alternator and a power converter comprising a voltage multiplier coupled to each phase of the alternator. Each voltage multiplier comprises one or more staged voltage doublers. The alternator phases may be coup... | 04/29/2008 |
| 7301309 | Method and device for providing the supply voltage for the loads of a vehicle on-board electrical system, using a plurality of generators A method and a device for providing the supply voltage for the loads of a vehicle on-board electrical system, using a plurality of generators. A regulator unit having at least one output stage transistor is allocated to each of the generators. The output stage trans... | 11/27/2007 |
| 7233843 | Real-time performance monitoring and management system A real-time performance monitoring system for monitoring an electric power grid. The electric power grid has a plurality of grid portions, each grid portion corresponding to one of a plurality of control areas. The real-time performance monitoring system includes a ... | 06/19/2007 |
| 7141894 | Apparatus for providing high quality power The system disclosed herein is primarily utilized in the 23–48 volt DC telco, data center and industrial production industry. It will effectively replace today's requirement of purchasing, installing, maintaining and replacing chemical storage batteries. The solut... | 11/28/2006 |
| 7105946 | Distributed power generation system, and power supply system and power supply method utilizing the same A plurality of distributed power generation systems are connected via the Internet to a managing apparatus in a managing company. A power company communicates with the managing apparatus via another line. At peak times of power consumption in the midsummer and so fo... | 09/12/2006 |
| 7019495 | Inter-regulator control of multiple electric power sources The present invention includes a system and method for controlling multiple sources of electric power using inter-regulator control. The regulators in the system may be of a universal type that may operate either as a master regulator or a follower regulator. Determ... | 03/28/2006 |
| 6998804 | Electric motor with electronic brake A retarded electric motor designed as a series motor or an asynchronous motor having a squirrel cage rotor. A valve is provided for switching between motor operation and braking operation. During motor operation the motor is operated in a known configuration as seri... | 02/14/2006 |
| 5684341 | Electromagnetic generator for fast current and magnetic field pulses, for example, for use in magnetic metal working An electromagnetic generator for working electrically conducting objects with current and magnetic field pulses having a high rate of rise as expressed by dI/dt and dB/dt includes primary windings of a pulse transformer that are arranged in pairs so that ... | 11/04/1997 |
| 5606244 | Mobile AC power source system A mobile AC power source is described for generating AC electrical power that is powered by any rotational energy source such as a vehicle engine. The output of the mobile generator is sinusoidal but could have other shapes as well and is stable with vari... | 02/25/1997 |
| 5334926 | Electric power system for automotive vehicle An electric power system for an automotive vehicle is provided with a generator to which a 48-volt battery, a blower motor and a DC--DC converter are connected in parallel. An output terminal of the converter is connected to a load which is constituted by... | 08/02/1994 |
| 5321231 | System for supplying power to an electrically heated catalyst An electrical system for supplying power to an electrical resistive heater that heats the catalyst of a catalytic converter. The electrical system includes an alternating current generator that has an output winding and a field winding that is carried by ... | 06/14/1994 |
| 5317299 | Electromagnetic transformer A summing transformer having a core structure, first primary and secondary windings wound on the core structure for establishing a rotating electromagnetic field when the first primary winding is energized, and second primary and secondary windings wound ... | 05/31/1994 |
| 5168207 | Three level control system for a voltage dependent load An electrical control system for a voltage sensitive load having switch means for selecting from single or multiple rectified phases of a multi-phase alternator/generator to provide multiple output levels of DC voltage.... | 12/01/1992 |
| 5164655 | 12-24 volt power system A dual state power system utilizing power drivers to switch an alternator from 12 volt to 24 volt charging. A 12-24 volt alternator regulator charges a 12 volt battery or a 24 volt battery depending on the position of a mode switch. The invention allows t... | 11/17/1992 |
| 5093611 | Output circuit for portable generators An output circuit for a portable generator having a plurality of output windings provided separately from each other, and control winding provided separately from the output windings. A plurality of thyristor bridge circuits each having thyristors are con... | 03/03/1992 |
| 5068589 | Supplemental automotive vehicular heater system and method of providing same A supplementary heating system particularly suitable for an automotive vehicle comprises a step down transformer coupled to the stator windings of the vehicle's alternator and a positive temperature coefficient (PTC) of resistivity heater electrically con... | 11/26/1991 |
| 5013991 | Multi-voltage alternator with integral bank switched bridge A silicon controlled rectifier is connected between the output of each stator winding of a conventional alternator and a terminal of a lower voltage battery, and a control electrode of each silicon control rectifier is connected to a switching control cir... | 05/07/1991 |
| 4999563 | Separately power-feeding welding generator A separately power-feeding welding generator having at least two main generating windings for supplying power to loads by rectifying an induced voltage and adapted to permit the power being fed from the two main generating windings to the loads to be sepa... | 03/12/1991 |
| 4973896 | Automobile generator apparatus An automobile generator apparatus for producing commercial line power when driven by an automobile engine comprises a generator, an inverter unit, a controller for controlling the generator field and an accelerator actuator. The accelerator actuator is mo... | 11/27/1990 |
| 4967097 | Hybrid power system A hybrid power source includes a constant speed drive having an input coupled to a prime mover which develops variable speed motive power, an output driven at a substantially constant speed and a speed compensation link which transmits motive trim power a... | 10/30/1990 |
| 4967137 | High voltage electrical power supply device for the auxiliary circuit of a motor vehicle The invention relates to a high voltage electrical power supply device for an auxiliary circuit CA of a motor vehicle. The device comprises an alternator 1 having two identical stator windings 11 and 12, each connected to a rectifier bridge 13 and 14 supplying... | 10/30/1990 |
| 4956598 | Low distortion control for a VSCF generating system Prior variable speed constant frequency (VSCF) generating systems which utilize an inverter to derive constant frequency power from variable frequency power developed by a generator driven by a prime mover have controlled system output voltage by controll... | 09/11/1990 |
| 4868480 | Electric power generator Accessory for a motor vehicle alternator which is delta wound and has a full wave rectifier bridge to provide output selected from normal operation of vehicle electrics, arc welding, fast battery charging and high voltage supply to extraneous appliances. ... | 09/19/1989 |
| 4788486 | Vehicular power supply system having a plurality of power supply voltages A vehicular power supply system having a plurality of power supply voltages comprises a generator including first and second armature windings electrically isolated from each other and a field winding, a first rectifier unit converting a first a.c. output... | 11/29/1988 |
| 4749935 | Alternator and controlled rectifier for producing pulse width modulated DC output pulses A regulated chopped DC power supply comprising an alternator with a stator and a rotor, the alternator having a three-phase winding for providing a high voltage output (1, 2, 3) and a star-connected three-phase winding for providing a low voltage output. ... | 06/07/1988 |
| 4745340 | Electric generator system for portable floodlighting equipment A power supply system for portable floodlighting equipment employing high-intensity electric discharge lamps comprises an alternating current generator having three or more independent armature windings, one for producing independently current at a voltag... | 05/17/1988 |
| 4723105 | Dual voltage motor vehicle electrical system A dual voltage motor vehicle electrical system wherein batteries are series connected across the direct voltage output terminals of a generator. The system has a DC to DC converter that operates in a first mode as an equalizer to maintain the batteries in... | 02/02/1988 |
| 4692684 | High/low DC voltage motor vehicle electrical system An automotive electrical system with a generator has outputs for loads requiring a high and low voltage, e.g., a heater and a battery. A field-controlled a.c. generator with three-phase output windings has a low voltage main terminal and an auxiliary term... | 09/08/1987 |
| 4684873 | Hybrid generating system Prior types of generating systems for producing AC and DC output power have utilized integrated drive generators for producing the AC power and means for rectifying the AC power developed by the drive generator to produce the DC power. However, such types... | 08/04/1987 |
| 4672294 | Dual battery system with improved overvoltage protection A dual voltage, dual battery electrical supply system for automotive vehicles is disclosed. Two batteries are connected in series and a high voltage regulator regulates the voltage across the series connected batteries and a low voltage regulator regulate... | 06/09/1987 |
| 4672296 | Mobile emergency medical vehicle with auxiliary engine/generator providing AC/DC output This invention relates to a mobile emergency medical vehicle having a main transport engine and a medical equipment, supply and patient compartment or module, with such compartment having an independently operated electrical generating means powered by an... | 06/09/1987 |
| 4609862 | Twin winding three-phase alternator with zero slot coupling A winding arrangement for a twin winding set three-phase alternator having P rotor poles and 3nP stator slots, where P is an even integer and n is an integer greater than or equal to two, each set of three-phase windings comprising a group of P/2 intercon... | 09/02/1986 |
| 4554501 | Variable speed constant frequency power system with auxiliary DC output A DC-link, variable speed constant frequency power system is provided with an auxiliary DC output. The system includes a variable speed generator for producing a DC voltage on a pair of DC-link conductors. When the generator is operated in its normal spee... | 11/19/1985 |
| 4539515 | Vehicular direct-current three-wire electric system A vehicular charging and starting system is improved by providing first and second a.c. generators, rectifiers and voltage regulators, the negative terminal of the first rectifier and the positive terminal of the second rectifier being connected to a neut... | 09/03/1985 |
| 4517507 | Multiple output alternator system A single alternator having multiple isolated windings provides multiple outputs as for charging 12 and 24 volt batteries. A main regulator controls the field coil current and a secondary regulator controls the charging current for the second battery by co... | 05/14/1985 |
| 4516066 | Dual-voltage battery charging system A battery charging system for a dual-voltage motor vehicle electrical system that has a pair of series-connected batteries that can energize an electric cranking motor. One of the batteries is charged from a diode-rectified alternating current generator. ... | 05/07/1985 |
| 4424464 | Combination DC/AC generator for automotive vehicles An AC/DC generator small in size and small in weight is obtained by forming into one unit an ordinary charging generator and an inductor type generator which are juxtaposed in the axial direction. The AC section has no commutator; it can supply power for ... | 01/03/1984 |
| 4347473 | Dual alternator power system for motor vehicle In an emergency vehicle having dual batteries, one of which is employed for supplying power to the electrical system of the vehicle chassis and the other of which is employed for supplying power to the emergency equipment, dual alternators driven by the e... | 08/31/1982 |
| 4262242 | Voltage regulator A voltage regulator for an AC generator which supplies power to multiple loads at different voltage levels. The magnitude of the multiple voltages and other controlled variables such as per unit current are sensed and individual field currents are generat... | 04/14/1981 |
