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7221127 |
Alternator with rectifier bridge in particular for motor vehicle
The alternator comprises a wound rotor and a stator with a number of phases connected to a rectifier bridge equipped with switches ( 7 ) in the form of MOS type transistors, such as MOSFET type...
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6897573 |
Electrical voltage generating device
A manually operated voltage generating device provides an electrical voltage for operating an electronic unit such as a remote control handheld unit. The device has a permanent magnet mounted in a...
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6703718 |
Wind turbine controller
A wind turbine with a permanent magnet alternator that uses a boost mode controller to improve performance at low and high wind speeds. The boost mode controller also allows the permanent magnet...
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5652485 |
Fuzzy logic integrated electrical control to improve variable speed wind turbine efficiency and performance
A control system utilizing fuzzy logic adaptive control to control the operation of a wind turbine driven electric power generator to control power generator speed and hence power frequency while...
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5406190 |
Device for generating electrical energy having an A.C. generator coupled to a turbine
A device for generating electrical energy includes at least one a.c. generator which is coupled to a turbine driven by a flowing medium and is connected via capacitive elements to a rectifier with...
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5296799 |
Electric power system
An electric power system has an air compressor unit with a reservoir tank, an air powered motor and an electric generator. The air compressor unit has an air compressor that provides compressed air...
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5289106 |
Electrical supply system for low current loads
An electrical supply system (10) for use with low current loads (12) disposed in hazardous areas, is described. Electricity is supplied to the low current load (12) from a local source (46) in...
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5140254 |
Shower accessory
An accessory is provided for a shower having a shower outlet. The accessory includes a housing having a front, a back and a fluid passageway extending between the front and the back of the housing....
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5079495 |
Charge exhaustion preventing apparatus of storage battery
A charge exhaustion preventing apparatus of a storage battery, includes a generator disposed on a waterway, a storage battery charged by the generator, an electromagnetic valve which opens and...
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5029288 |
Method and apparatus for operating a variable speed power generation system
A method and apparatus for operating a variable speed power generation system in which the generated output of an induction generator is adjusted by controlling current in the secondary side of the...
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4951915 |
Electronic water flow control device
An electronic water flow control device, which includes a mini-scale electrical generator which changes the mechanical energy from water flow into electrical energy for storage in a battery and for...
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4918369 |
Hydro-energy conversion system
A water or fluid driven system is provided for use in a water open or closed loop system. The water driven system includes a flow control valve connected to a water line of the water open or closed...
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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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4731545 |
Portable self-contained power conversion unit
A portable, self-contained power conversion unit is disclosed that is attached to an outlet for a pressurized fluid system, such as the nozzle for a garden hose. An impeller mounted in the body of...
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4723107 |
Hydraulic lifting mechanism
A hydraulic lifting mechanism, particularly suitable for a battery-powered industrial truck, including a hydraulic lifting cylinder, a hydraulic unit, operating as a pump in the load lifting...
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4703189 |
Torque control for a variable speed wind turbine
Apparatus and method for controlling a variable speed wind turbine-generator at improved efficiencies is disclosed. The method and apparatus of the invention control the rotor tip speed below the...
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4695736 |
Variable speed wind turbine
A variable speed wind turbine includes a frequency converter which converts variable frequency AC from a turbine driven AC generator to fixed frequency AC for delivery to a power grid. The...
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4674279 |
Control system for run-of-river hydroelectric plant
A control system for a hydroelectric power plant of the run-of-river type wherein the load on the turbine-generator units is matched to the flow of the river so that the units operate at the...
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4656413 |
Stabilized control system and method for coupling an induction generator to AC power mains
A stabilized control system and method for smoothly connecting and disconnecting an induction generator to the utility power grid is described. Thyristor switches are interposed between each phase...
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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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4613763 |
Wind driven electric power generating system
The shaft of a wind driven propeller is coupled to the rotor shaft of an electrical generator through an over-running centrifugal clutch and a speed changer mechanism. When the wind attains a...
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4613762 |
Output responsive field control for wind-driven alternators and generators
The field voltage of a wind-driven alternator or generator is automatically controlled in response to the output voltage developed in the load with the objective of always maintaining the maximum...
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4563630 |
Method of governing a generator and/or apparatus for governing a generator
A method and apparatus for governing a generator which generator comprises micro-hydropower generating equipment usable in run-of-the-stream situations. A plurality of dump loads are associated...
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4535252 |
Wind electric generation plant and system with improved alternator field excitation
An improvement in a wind electric generation system of the type disclosed in Jacobs et al. U.S. Pat. Nos. 4,059,771, 4,228,361, and 4,228,362, with particular reference to U.S. Pat. No. 4,228,361....
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4525633 |
Wind turbine maximum power tracking device
A method and apparatus for controlling the level of power transferred through a stand-alone wind power generating system utilizing a wind turbine whose output is converted to electrical power by...
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4513206 |
Exploitation of wind energy for producing electrical power
A prime mover (4), such as an internal combustion engine, and a wind rotor (1) are connected to an AC generator (2) by a differential gear (3) having its planetary-gear carrier meshing with the...
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4511806 |
Pressure drop power generation
What is proposed is an electrical energy generator that uses air pressure from a pressurized source for breathing purposes in an underwater or smoke environment wherein a conduit passes the air...
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4510935 |
Cardiac defibrillator
An electrical energy source, particularly suitable for portable emergency equipment such as cardiac defibrillators, uses a small explosive charge of which the energy is converted into a short...
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4489290 |
Circuitry for controlling the reflected torque on a generator driven by a fluid meter
The output of an electrical generator driven by a meter is coupled to a load through circuitry for limiting the reflected forces placed on the meter.
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4473792 |
Coupling an induction motor type generator to A.C. power lines
A coupling system for an induction motor type generator (10) to an A.C. power line (18) wherein an electronic switch means (28) which is controlled by a control system (30) is regulated to turn...
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4464579 |
Derrieus wind turbine electric generating system
A wind electric system intended to provide power to a power grid, for use with a wind turbine which has no starting torque. The generator is one which can function as a motor as well. When the wind...
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4451775 |
Motor/generator starting circuit
A circuit for use with an induction generator. The circuit is arranged to initiate operation of the induction generator as a motor to bring the system up to operating speed and subsequently to...
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4438341 |
Method of an apparatus for varying the load on an A.C. generator
The variation of the load on a wind-driven A.C. generator (16) in accordance with a predetermined law which relates the load to the speed of rotation, is achieved by detecting the period of each...
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4423368 |
Turbine air battery charger & power unit
An automobile is provided with a wind driven electric generator. An air duct extends from an inlet along the roof section of the body above the windshield and over the passenger compartment to air...
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4421967 |
Windmill driven eddy current heater
A windmill electric heater converts wind energy to heat energy. A windmill drives a rotor of an eddy current heater. Magnetic fields are provided at an air gap between the rotor and a stator of the...
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4400659 |
Methods and apparatus for maximizing and stabilizing electric power derived from wind driven source
The shaft of a wind turbine is connected to the rotor of a three-phase AC generator. The rotor windings, in turn, are connected to the rotor windings of a DC-energized, AC exciter via a...
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4395669 |
Electrical machine having controlled characteristics and its application to a wind-driven machine
The invention provides an electrical machine having an inductor and an armature at least one of which has at least two independent winding assemblies. The switching into and out of circuit of each...
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4388585 |
Electrical power generating system
A power generating system for adjustably coupling an induction motor, as a generator, to an A.C. power line wherein the motor and power line are connected through a triac. The triac is regulated to...
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4357542 |
Wind turbine generator system
Wind turbine generator systems incorporating a multi-speed pole amplitude modulated type dynamo electric machine allowing efficient operation at consecutive speeds in a ratio preferably less than...
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4331881 |
Field control for wind-driven generators
The field current of a wind-driven generator is automatically controlled in response to a first signal representing the wind speed and a second signal representing the impeller tip speed so as to...
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4322673 |
Highway pressure-responsive means for generating electricity by vehicles
An energy conservation and highway safety apparatus for supplying supplemental or emergency electrical power caused by passage of vehicles over the apparatus comprising a plurality of elongated...
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4242628 |
Wind energy conversion system
A wind turbine drives the squirrel-cage rotor of a capacitively excited induction generator. The amount of excitation is controlled in accordance with the output voltage of the stator and hence the...
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4228391 |
Induction machine
A polyphase rotary induction machine for use as a motor or generator utilizing a single rotor assembly having two series connected sets of rotor windings, a first stator winding disposed around the...
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4208592 |
Compressed air power generating system
A system for converting compressed air to motive power for generating electricity, a part of the output being used to partially recharge an initial compressed air source, thereby permitting the...
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4205235 |
Automatic electrical load matching device for wind generators
An automatic electrical load matching device for applying loads to wind den generators. The device switches five different loads to the output of a wind driven generator. Each load corresponds to a...
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4198572 |
Regulated apparatus for the generation of electrical energy, such as a wind generator
The invention relates to a regulated apparatus for the generation of electrical energy. A wind generator comprises a propeller having fixed blades and a generator connected by a transmission to the...
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4159426 |
Energy conversion system
In a venturi-shaped wind tunnel, a wind is generated by a wind generating device in the larger end of wind tunnel. Wind thus generated is caused to speed up by the venturi and drives a rotatable...
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4146264 |
Load control for wind-driven electric generators
In a wind-driven generator system, the generator load curve is matched to the wind-driven rotor characteristic by an electronic field current control which is responsive to the rotor speed. A...
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4112311 |
Windmill plant for generating energy
Windmill or solar plant for generating electric energy having a transmission in the form of an epicyclic gear transmission with sun wheel and planet wheels, the sun wheel of which is connected to...
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4095120 |
Load control for wind-driven electric generators
A generator load curve is precisely matched to a wind-driven motor characteristic by means of a rotor speed-responsive tachometer effecting stepwise control of field current in the generator....
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