Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 8080950 | Induction motor torque control in a pumping system A system and method are provided for controlling the speed of a motor driving a load that is electrically connected to a generator driven by an engine, through use of a first control feedback loop configured to control the rotor flux of the motor by controlling the ... | 12/20/2011 |
| 7495399 | Power output apparatus and vehicle including the same A coordination control device of a power output apparatus includes a coordination control unit. The coordination control unit calculates an intermediate value between the maximum value and minimum value among voltage controls for a first motor generator, and voltage... | 02/24/2009 |
| 7288923 | Voltage-limited electric machine An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another... | 10/30/2007 |
| 7023160 | Method for controlling doubly-fed machine A method for operating a doubly-fed machine by determining its rotational speed (nact), forming a rotational speed reference (nref), measuring network voltage and current, and calculating network active power (Pact) and reactive powe... | 04/04/2006 |
| 7021427 | Lifting apparatus and method A method for intelligent control includes an exchange of historical parameters of events for operating a system and operating a hoist where an electric motor, preferably a DC-motor, is used for lifting and lowering a lifting belt. It can take place at different spee... | 04/04/2006 |
| 7015662 | Engine operated machine The invention makes an output sharing of an engine and an electric motor proper so as to suitably drive a load. When a throttle opening degree variation amount ΔV is within a ΔV1, an engine E can drive a power generator G at a rated revolution speed. A swit... | 03/21/2006 |
| 6799096 | Method for optimizing energy in a vehicle/train with multiple drive units A method for power optimization in a vehicle/train, using time reserves which are included when planning a schedule, is proposed. In order to achieve a power-saving travel mode with the aid of an optimization algorithm, the presence of a number of completely or part... | 09/28/2004 |
| 6792338 | System and method for actively limiting the power drawn from a power distribution bus A control system (10) actively limits the power drawn from a main power distribution bus (20) by one or more electric loads (30). The system (10) includes circuitry (14) for determining a maximum permissible current magnitude that ... | 09/14/2004 |
| 6687580 | Vehicle controller and vehicle control method A vehicle controller includes a plurality of driving power sources for transmitting torque to a wheel, and a starter for starting a first driving power source of the plurality of diving power sources. The first driving power source is stopped when a presc... | 02/03/2004 |
| 6583519 | Apparatus for generating and distributing electrical power to loads in a vehicle An apparatus for generating and distributing electrical power in a vehicle which has at least one electric drive motor connected via a converter to a fuel cell unit, with the fuel cell unit being connected to at least one first, one second and one third v... | 06/24/2003 |
| 6583592 | Control apparatus for hybrid vehicle A control apparatus enhances charge and discharge performance of a main battery in a low temperature environment, extends the life of the main battery and improves the reliability of the whole system. The control apparatus is for a hybrid vehicle having a... | 06/24/2003 |
| 6373206 | Motor drive control apparatus An electrical motor having a drive function and a power generating function is directly connected to an engine mounted on a vehicle. The vehicle has a starter connected to the engine. A motor control means for controlling the drive of the motor in coopera... | 04/16/2002 |
| 5841201 | Hybrid vehicle drive system having a drive mode using both engine and electric motor A hybrid drive system for a motor vehicle, having a power drive state in which there is available a power drive mode in which an engine and an electric motor are both operated as a drive power source for driving the vehicle, and wherein a manually operate... | 11/24/1998 |
| 5820172 | Method for controlling energy flow in a hybrid electric vehicle An operating strategy for a hybrid electric vehicle (HEV) manages the flow of energy to both supply the motive demand power of the HEV and maintain the charge of the energy storage system (ESS). A controller operates the main power unit (HPU) and ESS and,... | 10/13/1998 |
| 5788004 | Power control system for motor vehicles with a plurality of power-converting components In a power control system for motor vehicles with a plurality of power-converting elements as well as sensors for determining the efficiency of the individual elements, a processor determines the overall system efficiency from the efficiencies of the indi... | 08/04/1998 |
| 5734239 | Automatic generator start up and shut off device A device and method for continuously monitoring the availability of an external electric power supply into a recreational vehicle such as a motor home, a boat and the like and controlling the operation of an onboard engine powered generator to serve as an... | 03/31/1998 |
| 4263988 | Speed control system for a motor A speed control system for an elevator motor, comprising a D. C. motor for driving an elevator, a device which generates a speed command signal for the elevator, a speed dynamo which generates a speed signal corresponding to a speed of the elevator, a spe... | 04/28/1981 |
| 4232255 | Delivery control system for vehicle-mounted spreader A control system for regulating the speed of a truck-mounted material conveyor includes a direct current drive motor and a truck-driven shunt generator for providing power to the motor. A control circuit has a reference input representing desired delivery... | 11/04/1980 |
| 3965403 | Constant power control of a D.C. electric motor for handling cargoes A crane motor control is disclosed which includes a variable D.C. voltage supply in a Ward-Leonard set which is controlled by a load torque signal obtained by sensing the armature current of a motor, magnetic flux in the motor field winding and the rate o... | 06/22/1976 |
