Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8305021 | Dual purpose permanent magnet speed sensor and generator An apparatus is disclosed for simultaneously measuring the rotational speed and/or direction of a shaft, and providing control power in accordance with the shaft rotation. The apparatus includes a permanent magnet machine (PMM) having a multipole rotor and a stator.... | 11/06/2012 |
| 7453240 | Generating apparatus and motor control apparatus A generator having a field coil L, and an SW1 control circuit 2 for controlling field current flowing through the field coil L. When a generating operation of the generator is to be ended, a switch 1 SW1 is turned off to interrupt the fie... | 11/18/2008 |
| 7365519 | Excitation system having inner loop voltage regulator with by-pass capability An excitation system that includes an exciter for generating a field voltage for a rotor, a first automatic voltage regulator and a second automatic voltage regulator. The first regulator receives an output voltage of the power generation system as an input, and the... | 04/29/2008 |
| 7313008 | Converter circuit for producing low harmonics A converter circuit is specified for at least one phase (R, Y, B), which converter circuit has a first switching group system which is provided for each phase (R, Y, B) and has a first main switching group which is formed by a power semiconductor switch and by a cap... | 12/25/2007 |
| 7307403 | System and method for DC power generation from a reluctance machine A system and method is provided for generating DC power using a synchronous reluctance machine (12) or a salient-pole synchronous machine (102) and a power converter (110). The present invention can be used to achieve power production for a sync... | 12/11/2007 |
| 7291933 | Double alternator and electrical system for a vehicle A double alternator for a vehicle and a vehicle electrical system employing the double alternator. ... | 11/06/2007 |
| 7245111 | Regulator system for alternator An improved regulator system is disclosed for controlling a field winding of an alternator to regulate the charging of a battery. The improved regulator system comprises an internal regulator mounted onto the alternator. The internal regulator has an internal regula... | 07/17/2007 |
| 7239036 | System and method for power control in wind turbines A system and method for power control in wind turbines are provided. The method includes switching a plurality of switching devices in a power conversion component of the wind turbine system in a normal switching mode to provide power flow through the power conversi... | 07/03/2007 |
| 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 |
| 7190085 | Wind turbine for producing electrical power and a method of operating the same A wind turbine includes a turbine rotor with at least one blade and a generator with a rotor and a stator. The turbine rotor is mechanically coupled with the rotor of the generator. A diode rectifier is electrically coupled to the stator of the generator. A direct c... | 03/13/2007 |
| 7180270 | Frequency converter for high-speed generators The present invention relates to a method and to a device for adapting the alternating current generated by a generator (1) and the alternating voltage generated by a generator (1) to a grid (8), whereby the generator (1) has at least one... | 02/20/2007 |
| 7173398 | System for controlling a vehicular generator A system for controlling a vehicular generator, includes: a voltage controlling device 1 for adjusting a generator output voltage of a generator 10 connected to an in-vehicle battery 4 to a predetermined voltage, the voltage controlling device | 02/06/2007 |
| 7124691 | Method for monitoring and controlling locomotives The present invention is directed to a locomotive comprising energy storage units, such as batteries, a prime energy source, such as a diesel engine, and an energy conversion device, such as a generator. The locomotive comprises one or more of the following features... | 10/24/2006 |
| 7119519 | Control apparatus for on-vehicle generator that sends power from the battery to the field winding and from the field winding back to the battery A control apparatus for an on-vehicle generator is provided. The generator, driven to rotate by an on-vehicle engine, is provided with stator windings, rectifiers, a field winding, and a voltage control apparatus (i.e., the control apparatus for the on-vehicle gener... | 10/10/2006 |
| 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 |
| 7061211 | Gas turbine generating apparatus A gas turbine generating apparatus according to the present invention comprises a gas turbine capable of a high-speed operation, a permanent-magnet-type generator driven at a high speed by the gas turbine, an inverter device (5) for converting alternating-cur... | 06/13/2006 |
| 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 |
| 6969922 | Transformerless, load adaptive speed controller The invention in one embodiment is an improved variable speed engine/generator set with an integrated power conditioning system and control method including load shedding to generate high quality AC power with improved fuel efficiency and reduced emissions. The vari... | 11/29/2005 |
| 6943532 | Voltage control apparatus for vehicle generator having a light emitting diode A voltage control apparatus 1 for a vehicle generator 2 has an input terminal L for inputting the voltage of a battery 5 through an ignition switch 3 and a light emitting element (light emitting diode 4) connected in series with th... | 09/13/2005 |
| 6933625 | Variable speed wind turbine having a passive grid side rectifier with scalar power control and dependent pitch control A variable speed wind turbine having a passive grid side rectifier using scalar power control and dependent pitch control is disclosed. The variable speed turbine may include an electrical generator to provide power for a power grid and a power conversion system cou... | 08/23/2005 |
| 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 |
| 6927500 | Automotive accessories control system Power generated by an alternator 2 and power generated by an electric motor 12 are controlled such that a power generation amount of either the alternator 2 or the electric motor 12, whichever has a higher power generation efficiency, bec... | 08/09/2005 |
| 6897370 | Power generation apparatus and its control method In an AC module, if an interconnection relay is provided in an inverter, the inverter increases in size, and disconnection status between the AC module and a system upon occurrence of abnormal condition cannot be easily checked by a user. Accordingly, a plug is conn... | 05/24/2005 |
| 6879053 | Transformerless, load adaptive speed controller The invention in the simplest form is an improved variable speed engine/generator set with an integrated power conditioning system and control method, used to generate high quality AC power with optimum fuel efficiency and reduced emissions. The variable speed gener... | 04/12/2005 |
| 6750633 | Electrical circuit for generating a three-phase alternating current An electrical circuit for producing a three-phase AC current from a low-power generator (10 kW to 5 MW) and for feeding the current into a power grid has a forward mode where energy flows from the generator to the power grid or to an energy-storage device and a reve... | 06/15/2004 |
| 6713890 | Power generation apparatus and its control method In an AC module, if an interconnection relay is provided in an inverter, the inverter increases in size, and disconnection status between the AC module and a system upon occurrence of abnormal condition cannot be easily checked by a user. Accordingly, a plug is conn... | 03/30/2004 |
| 6657416 | Control system for stand-by electrical generator A generator structure is provided for generating an AC power for a load. The generator structure includes a generator connectable to a load and an engine operatively connected to the generator for driving the same. A generator controller is operatively co... | 12/02/2003 |
| 6605928 | Electrical system for turbine/alternator on common shaft An electrical system for a turbine/alternator comprising a gas driven turbine and permanent magnet alternator rotating on a common shaft comprises an inverter circuit connectable either to an AC output circuit or the stator winding of the alternator. A co... | 08/12/2003 |
| 6445079 | Method and apparatus for controlling an induction machine An electrical machine (10) suitable for use as a starter/alternator for an automotive vehicle, has an inverter circuit (12), a rectifier circuit (14), and a stator circuit (16) that couples the inverter circuit (12) to the rectifier circuit (14). In addit... | 09/03/2002 |
| 6313613 | Controller AC generator for vehicle A vehicle AC-generator controller includes a storage battery to be charged by a rectification output of an AC generator having a field coil, a voltage regulator for controlling an output voltage of the AC generator to a predetermined value by controlling ... | 11/06/2001 |
| 6118257 | Switchgear for a power station generator and a transformer with a three-position disconnector The switchgear comprises a circuit breaker having an open position for isolating a generator from the network, and a closed position for connecting the generator to the network, together with a disconnector having a fixed pole connected to the generator a... | 09/12/2000 |
| 5767663 | Vehicular power producing system A system for producing electrical power on a wheeled vehicle is disclosed. The system includes a wheeled vehicle that has a chassis carried upon a plurality of wheel units where each wheel unit is rotatably coupled to the chassis. The wheel unit includes ... | 06/16/1998 |
| 5696438 | Electrical hybrid vehicle battery charging system arrangement Electrical hybrid vehicle propulsion system in which a generators run directly from the drive shaft are employed to provide trickle charging of the battery when the vehicle is in operation. Mounted on the drive shaft is a rubber base molded adaptor with c... | 12/09/1997 |
| 5684388 | Scroll saw motor/printed circuit board housing with switch lock-out A motor housing for a variable speed scroll saw or other operating tool is disclosed. The motor housing includes a motor as well as a printed circuit board mounted in the motor housing adjacent the motor. A switch is attached to the printed circuit board ... | 11/04/1997 |
| 5614809 | Electric generation control system for hybrid vehicle When the remaining capacity of a battery on a hybrid vehicle is smaller than a threshold value or the battery is unable to output the amount of electric energy required to propel the hybrid vehicle with a propulsive electric motor, the engine is started b... | 03/25/1997 |
| 5608308 | Electric generation control system for hybrid vehicle The opening of the intake air control valve of an engine which actuates a generator on a hybrid vehicle is basically controlled by an intake air control valve control assembly to cause the engine to produce a power output corresponding to a target generat... | 03/04/1997 |
| 5604421 | Electrical systems An electrical supply system with two power generators and several items of electrical equipment has a processor that controls disconnection of the equipment if demand should exceed supply. The processor has a hardware switch controlled by outputs from the... | 02/18/1997 |
| 5600232 | Alternator system for a vehicle A charging system includes a high capacity charging circuit having the original internal engine alternator connected substantially in parallel with an auxiliary alternator by a simple wiring harness arrangement that easily plugs into the existing connecto... | 02/04/1997 |
| 4985671 | Power supply circuit for a motor vehicle with two load voltages A reasonably priced power supply circuit for a motor vehicle with two different load voltages, viz. the normal vehicle supply system voltage and a voltage higher than this for operation of a window heating glazing with a thin-film heating resistor. A gene... | 01/15/1991 |
| 4862341 | Filter for variable speed, constant frequency electrical system A variable speed, constant frequency electrical generating system has a variable speed, engine driven generator. The system operates in either a generate or an engine start mode. A bidirectional filter connected between the rectifier-converter and the AC ... | 08/29/1989 |
