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7378808 |
Electric drive system having DC bus voltage control
An electric drive system has a power source and a generator operatively connected to the power source. The generator is configured to produce a power output. The electric drive system also has at...
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7285869 |
Method for estimating engine power in a hybrid electric vehicle powertrain
A method is disclosed for estimating engine power output for an engine in a hybrid electric vehicle powertrain that includes an electric motor and an electric generator. Selected powertrain...
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7279799 |
Motor vehicle driven device for operating a portable electric generator
An electric generator device powered by a driving wheel of a motor vehicle. The device includes a base for supporting an electric generator. An idler roller assembly includes at least one load...
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7173399 |
Integrated torsional mode damping system and method
An integrated torsional mode damping method for a current source converter, including a rectifier, an inverter, and a DC link inductor coupled between the rectifier and the inverter, includes...
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RE39205 |
Power output apparatus and method of controlling the same
While a ring gear shaft 126 linked with a drive shaft rotates, a power output apparatus 110 applies a torque to a first motor MG 1 attached to a sun gear shaft 125, thereby abruptly...
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7053589 |
Long-life vacuum system for energy storage flywheels
The invention, intended primarily for use in a steel flywheel power source ( 30 ), provides a vacuum system and a method of maintaining a vacuum inside a flywheel chamber ( 32 ) for the life of the...
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6744146 |
Electrical circuit for providing a reduced average voltage
Systems and methods of the invention may utilize integrated starter-alternator (ISA) electronics to drive a conventional DC starter coupled to a start-stop ISA system providing a voltage higher...
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6677685 |
Controller for a continuously variable transmission
A clamp pressure controller for a variable ratio belt drive system for a generator is provided. The controller monitors the voltage at the output of the generator. If this falls the controller...
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6573626 |
Apparatus for uninterruptedly supplying power including an electrical machine and a flywheel
An apparatus for uninterruptedly supplying power includes an electrical machine including a rotor and being designed and arranged to be connected to a load to be supplied with alternating current....
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6561940 |
Method of and apparatus for driving aircraft generator at a constant-speed
An output rotational driving power of the engine is split into a first split power and a second split power. The first split power is transmitted to a continuously variable speed transmission that...
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6527660 |
Method and apparatus to transfer torque at a nominally constant speed to a dynamoelectric machine from a variable speed engine
A transmission for coupling a variable speed engine to a dynamoelectric machine that has three hydraulic units coupled to a mechanical summer, wherein two of the hydraulic units are varied in...
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6208036 |
Powertrain with integrated motor generator
A hybrid powertrain has an internal combustion engine, a power transmission and an electric drive. The electric drive includes a stator secured in the housing of the power transmission and a rotor...
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6133716 |
High-efficiency high-power uninterrupted power system
An uninterrupted power supply (UPS) system provides power to an electrical load when utility line power fails. When the utility line power is normal a synchronous dynamo serves as a motor, and a...
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6087753 |
High-efficiency inductor-alternator
An inductor-alternator provides highly efficient conversion between mechanical and electrical energy. The inductor-alternator produces increased output by providing armature coils in a single air...
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5901269 |
Speed regulating circuit for motor of power coping saw
A speed regulating circuit for a motor of a power coping saw includes a DC voltage circuit, a manual speed regulating circuit, a feedback controlling circuit and a motor driving circuit. The DC...
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5747883 |
Fan and generator variable speed drive mechanism
The cooling for large track laying type vehicles is provided by a fan which circulates air through the powertrain compartment and a radiator. The fan speed is varied to reduce the power requirement...
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5731687 |
Generator assembly
In a generator assembly, outside air, taken from a suction hole into a fixed soundproof housing, is sucked into a portable engine generator covered by a soundproof case to operate an engine and...
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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...
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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...
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5656921 |
Control of a vehicle powertrain
A controller 20 for a vehicle powertrain, the powertrain comprising an electric motor 16 powered by a battery and an engine 14 powered by fossil fuel. The engine 14 is typically an internal...
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5637987 |
Regenerative vehicle launch
A hybrid electric vehicle includes an internal combustion engine, a multi-speed automatic transmission, and an electric machine operable in a motoring mode and a generating mode. A compound...
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5476293 |
Electric energy storage and distribution system of differential distribution type
An electric energy storage and distribution system for a fluid-driven propeller, the propeller being connected to drive an AC generator, includes a planetary gear system by means of which rotation...
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5068591 |
Speed control for electrical generating system
An electrical generating system is driven by a variable speed prime mover through a constant speed drive. A speed control, as a proportional integrator responsive to frequency error, controls the...
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4908565 |
Power generating system
A power supply system for developing electrical power from variable-speed motive power produced by a prime mover includes a differential speed summer having a first shaft coupled to the prime mover...
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4888493 |
Speed trimming integrated drive generator
A speed trimming integrated drive generator 18 includes a differential 24 having inputs coupled to a prime mover 20 and to a wild frequency generator 48, the output thereof being coupled to a main...
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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...
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4841202 |
Speed-limited electrically compensated constant speed drive
An electrically compensated constant speed drive which is speed limited so that power flow through the speed compensation link is unidirectional includes a permanent magnet generator which is...
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4808842 |
Dual voltage generator system
A system for providing a regulated low voltage DC source and a regulated higher voltage AC source at a preselected frequency, such as 60 Hz. from the same windings of an alternator rotated at...
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4777376 |
Lightweight starting system for an electrically compensated constant speed drive
An electrically compensated constant speed drive includes controllable gear boxes in the speed compensation link of the drive which permit the overall speed ranges of the permanent magnet machines...
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4734626 |
Double differential, electrically compensated constant speed drive
An electrically compensated constant speed drive (ECCSD) according to the present invention includes a pair of power transmission paths between the prime mover and a load wherein each power...
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4733155 |
Speed control unit for an aircraft generator
A speed control unit for an aircraft generator includes a continuously variable gear ratio drive device through which the generator is driven by a shaft of the engine and which is responsive to an...
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4728841 |
Dual permanent magnet generator construction
Difficulties in precisely and easily adjusting the relative position of two rotors, 72, 104, 206, 226 in a dual permanent magnet generator are avoided in a structure including first and second side...
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4695776 |
Power converter for an electrically-compensated constant speed drive
An electrically-compensated constant speed drive according to the present invention includes a speed summer having first and second input shafts and an output shaft at which constant speed motive...
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4694187 |
Electromechanical constant speed drive generating system
An electromechanical constant speed drive generating system is provided with a mechanical differential having first, second and third rotatable shafts, wherein the speed of the second shaft is...
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4692671 |
Electrically-compensated constant speed drive
An electrically-compensated constant speed drive according to the present invention includes a speed summer having first and second input shafts and an output shaft at which constant speed motive...
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4661762 |
Emergency power system
An emergency power generating system according to the present invention includes an emergency power converter which is selectively coupled to the output of a permanent magnet machine forming a part...
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4636707 |
Power generating equipment
An alternating current electrical power generating system in which the generator is driven by a prime mover, such as a fluid-driven turbine, whose speed may vary, the generator rotor being coupled...
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4572961 |
Constant speed drive with compensation using differential gears
The electrical supply system on aircraft may employ a constant speed drive (CSD) to convert variable engine speed to constant speed for operation of synchronous 400 Hz electrical generators. The...
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4525661 |
Stand-by electrical supply source
A stand-by electrical energy source for equipment to be operated with substantially continuous current supply, comprising three components one of which is at least one electric rotary machine,...
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4488053 |
Electric constant speed/variable speed drive/generator assembly
The invention is an "electric" constant speed/variable speed drive/generator assembly (10), which finds use in aircraft, and in particular, in "all-electric" aircraft. The assembly (10) includes...
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4439720 |
Units for generating constant-frequency alternating electric energy with substitute driving means
An electrical alternator system is capable of being driven by either of two prime movers and of being automatically transferred therebetween without substantial variation in the electrical output...
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4432253 |
Unbalance compensator
A dynamic balancing system for rotary elements wherein balance is maintained by remote control of mass distribution during rotation. A fluid balancing mass partially fills three or more annular...
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4413223 |
Induction generator frequency control system
A frequency control system for an n-phase induction machine having an input shaft and at least one output line, where n is an integer. The system includes a generator that provides an electrical...
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4401938 |
Variable-speed drive for control of induction generators
The invention is an aircraft power generation system which utilizes an induction-machine (G 1 ) as a primary generator of variable-voltage/variable-frequency power. The induction-machine (G 1 ) is...
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4326158 |
Method for attenuating oscillations of a rotating system
A method for attenuating oscillations of a rotating system. Acceleration and deceleration of the system are sensed. In dependence on an acceleration, an eddy-current brake is applied to the...
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4278928 |
Electric generator arrangement
An electric generator arrangement comprises a generator and a continuously-variable ratio drive, whereby the generator can be driven at a constant speed over a range of speeds applied to an input...
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4048511 |
Automatic output control method and dynamo equipment for generating sets using automobile wheel friction drive
An automatic output control method and dynamo equipment for generating sets using automobile wheel friction drive, which, in relation to generating sets using automobile wheel friction drive and...
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4032829 |
Road shock energy converter for charging vehicle batteries
Energy, from road bed jolts, expended against the wheels and axle or axle housing of either a self-propelled or a trailer vehicle so as to cause the axle to rise and fall is transmitted to a...
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3859589 |
ELECTRIC GENERATION APPARATUS
An electric generation apparatus for houses and the like wherein the prime mover is an automobile's driven wheel that has in combination a pair of fluted rollers adapted to receive the automobile...
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3800212 |
MECHANICAL-TO-ELECTRICAL CONVERSION SYSTEM
The present disclosure describes an electro-mechanical energy conversion system which may be utilized as a long shelf-life energy source for the operation of micropower electronic devices. High...
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