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8170723 |
Determination and use of power system sensitivities
The present disclosure relates to power system sensitivities as computed from power flow parameters and control parameters of a Power Flow Control Device (PFC). To this end, control parameter...
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8125196 |
Electrical power arrangement
Utilisation of a number of electrical machines such as generators all driven by a common prime mover, such as a gas turbine engine, are known. However, faults in one phase of one particular...
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8053915 |
On-vehicle rotary electric machine operating on two modes of rectification
A rotary electric machine for a vehicle includes a rotor, a stator and a rectifying device for current AC/DC conversion. The machine operates as a motor and a generator. The machine includes a...
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8049349 |
Power generation control device
A power generation control device can include a switching circuit which controls an output of a generator. A periodical power charge control unit can be configured to allow the switching circuit to...
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8030860 |
Working vehicle
A power shovel vehicle including a hydraulic pump that outputs hydraulic oil for operating a hydraulic actuator, an electric motor for driving the hydraulic pump, a main battery for supplying...
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7969030 |
Power generation systems and methods of generating power
A power generation system is provided that includes an internal combustion engine configured to provide rotational mechanical energy. A generator is configured to receive the rotational mechanical...
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7939953 |
Micro scale fischer-tropsch and oxygenate synthesis process startup unit
A mobile system for providing start-up electrical power to a micro scale liquid hydrocarbon and/or oxygenate synthesis plant is provided including a portable gas or liquid fueled electrical...
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7834472 |
Method of controlling a wind turbine connected to an electric utility grid during malfunction in said electric utility grid, control system, wind turbine and family hereof
The invention relates to a method of controlling a wind turbine connected to an electric utility grid during malfunction in said electric utility grid, said method comprising the steps of detecting...
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7795747 |
Method and apparatus for moving material
A method and apparatus for moving magnetic material includes an electromagnet for attaching and detaching the magnetic material where upon release of the magnetic material, the residual magnetic...
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7696459 |
Techniques for articulating a nose member of a guidable projectile
A guidable projectile has a nose member, a projectile body, and a nose member articulation assembly which couples the nose member to the projectile body. The nose member articulation assembly...
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7687927 |
Electrical systems architecture for an aircraft, and related operating methods
An electrical architecture for an aircraft is provided. The electrical architecture is particularly suitable for relatively small, compact, and lightweight aircraft. In one embodiment, the...
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7675187 |
Power generation systems and methods of generating power
A power generation system is provided that includes an internal combustion engine configured to provide rotational mechanical energy. A generator is configured to receive the rotational mechanical...
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7569944 |
Wind power generation system and operating method thereof
A wind power generation system wherein procedure for controlling the blade pitch is changed in accordance with the rate of decrease in the amplitude of the grid voltage, and when over current...
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7554213 |
Load control mechanism for self-propelled working machine
A self-propelled working machine, which performs work by using power of an internal combustion engine 10 and travels by using power of an electric motor 30, includes a mechanical governor 75 for...
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7525206 |
Power source device for working machine
Power distribution of an engine and an electric power storage device is determined according to a charge amount of the power storage device, and the charge amount of the power storage device is...
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7511384 |
DC conversion system
A DC conversion system includes a power-generating device, a power storage device, and a DC boost circuit. The power-generating device transforms power from natural resources such as solar power...
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7446425 |
Cooperative control apparatus
A cooperative control apparatus calculates the total electric load amount of a plurality of electrical loads (W), determines working states of the electrical loads (W), calculates a projected value...
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7417333 |
Methods and apparatus for controlling current in an electrical machine
A method for determining electric currents for an electrical machine includes generating a first real power current demand signal and a first reactive power current demand signal. The method also...
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7233129 |
Generator with utility fault ride-through capability
A wind powered turbine with low voltage ride-through capability. An inverter is connected to the output of a turbine generator. The generator output is conditioned by the inverter resulting in an...
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7095134 |
Error recognition for power ring
A power ring device that includes: a ring conductor; a plurality of controllers, each controller being connected to the ring conductor and includes a first control unit; a plurality of paired pick...
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7080449 |
Method and a connector arrangement for connecting and disconnecting a generator to a circuit with an existing alternating current
A method and a connector arrangement for connecting and disconnecting an electrical generator, such as a prime mover driven alternator (10), to a circuit with an existing alternating current such...
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7002259 |
Method of controlling electrical rotating machines connected to a common shaft
A controller for high torque, low RPM wind turbines and ocean current turbines. The turbine consists of a large, input power shaft-mounted, rotating bull-gear with stationary powertrains mounted...
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6930404 |
Power supply for an automotive vehicle
An electrical system (12) is provided for an automotive vehicle (10) having a first power source (14) with a first positive terminal (16) and first negative terminal (18). A second power source...
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6924627 |
Method of reactive power regulation and aparatus for producing electrical energy in an electrical network
A method of reactive power regulation in an electrical network in which electrical power is produced by an electrical generator preferably driven by the rotor of a wind power installation and...
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6856037 |
Method and apparatus for converting dissipated heat to work energy
A method for converting lower temperature dissipated heat to other useful energy and apparatus therefore. Heat energy is transferred to a fluid contained within a conduit, and natural convection of...
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6838779 |
Aircraft starter generator for variable frequency (vf) electrical system
A starter-generator for an aircraft engine comprises a variable dynamoelectric machine alternatively operable as a motor or as a generator, having a rotor. A support motor is coupled to the...
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6819008 |
Method for operating a switched reluctance electrical generator using data mapping
A method for operating a switched reluctance electrical generator in a manner that is highly efficient involves initially performing a mapping technique to obtain data relating to all of the...
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6812587 |
Continuous power supply with back-up generation
A continuous power supply may include a turbogenerator to provide power to supply the load and or an energy storage element and possibly also to the primary energy source. Utilizing an isolated DC...
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6759758 |
Wind turbines for electrical power generation
Improvements to wind turbines for electrical power generation, incorporating a blade (4) rotor for harnessing the action of the wind, which consists of a hub (3) prolonged at the rear with an...
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6737756 |
Power supply for an automotive vehicle using DC-to-DC converter for charge transfer
An electrical system (12) is provided for an automotive vehicle (10) having a first power source (14) with a first positive terminal (16) and first negative terminal (18). A second power source...
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6674180 |
Power supply for a hybrid electric vehicle
An electrical system (12) is provided for an automotive vehicle (10) having a first power source (14) with a first positive terminal (16) and first negative terminal (18). A second power source...
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6628004 |
Device and method for generating a partially synthesized signal with very good dynamic quality for the acceleration of a rotor in an electrical drive mechanism
A system and method for controlling the acceleration of an armature of an electric drive by generating a high quality acceleration error correction signal z, the system comprising an accelerometer...
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6552440 |
Automatic turbogenerator restarting method and system
A method and system to automatically restart a permanent magnet turbogenerator/motor when a fatal fault is detected. The automatic restart logic includes time constraints and limitations on the...
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6490506 |
Method and apparatus for monitoring hydroelectric facility maintenance and environmental costs
A system for monitoring maintenance information in a hydroelectric power generation facility comprises sensors coupled to a controller. The sensors detect actual levels of operating parameters for...
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6351103 |
Process for supplying electrical energy to the network with an AC generator associated with a turbine
Process for supplying electrical energy to the network with an AC generator associated with a turbine, by means of a transformer, characterized in that it consists in evaluating the generator...
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6310405 |
Non-directional frequency generator spark prevention apparatus
A non-directional frequency generator spark prevention apparatus including a plurality of electric connections connected with a direct current power source, i.e., brushes, and a commutator for...
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6294842 |
Fog cycle for microturbine power generating system
A microturbine power generation system includes an electrical generator, a turbine, a compressor and a combustor. Hot expanding gases leaving the combustor are expanded by the turbine. The...
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6274941 |
Process and device for dosing the thermal output of combined heat and power generation systems
The thermal output of a combined heat and power generation system is regulated by varying the speed of rotation while maintaining the position of the control means of the thermal engine in its...
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6169332 |
Constant turbine inlet temperature control of a turbine power generating system
A microturbine power generating system includes an electrical generator and a turbine having a fixed inlet nozzle geometry. Maximum thermodynamic efficiency of the microturbine power generating...
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5864183 |
Method and apparatus for optimizing performance of a pump-turbine
A technique is disclosed for optimizing performance of a pump-turbine unit while operating normally in the pumping mode by identifying gate positions resulting in optimization of certain parameters...
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5818115 |
Starting and charging apparatus
A starter dynamo having a pinion engageable with a ring gear and an armature for rotating the pinion is supplied at engine starting with an electric storage power from an electric double layered...
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5754446 |
Method and apparatus for optimizing performance of a kaplan turbine
A method and system for optimizing performance of a Kaplan turbine power generating unit are provided wherein an optimal "N-dimensional" virtual cam is populated with gate and blade positional...
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4823018 |
Control system for variable speed water-wheel generator apparatus
A control system for a variable speed water turbine generator apparatus includes a first function generator that is responsive to an output command signal. The first function generator produces a...
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4663536 |
A.C. motor-generator
A compact, high efficiency non-interruptive motor generator power system for generating and supplying to a load A.C. of a substantially constant frequency and of a substantially constant voltage,...
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4482813 |
Regulator system for a diesel electric locomotive
A regulator system for both the Diesel and the electric portions of a Diesel electric locomotive allowing more reliable operation at all locomotive speeds. Said regulator has a regulator to...
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4262209 |
Supplemental electrical power generating system
Hydrocarbon fuel energy is converted to AC electrical energy by a new system utilized to supplement AC power for household and similar limited size loads in synchronism with existing AC utility...
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4220868 |
Method of and system for controllably connecting load to generator
In a generator system, a load is alternatively connected to or disconnected from a generator to make it easy for the generator to get the load to start.
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4165727 |
Automatic fuel pump switch unit for fuel-injected internal combustion engines
In an internal combustion engine an automatic fuel pump switch connects a fuel pump motor to the battery. An electronic sensing circuit is connected to the output winding of an engine-driven...
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3629597 |
ENGINE-STARTING SYSTEMS
In an engine-starting system there is a starter circuit for starting the engine in the usual way, but in the starting circuit is provided means for breaking the transistor circuit when the engine...
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3543037 |
LOAD DISCONNECTING DEVICE FOR AN ALTERNATOR ADAPTED FOR ROTATION AT VARYING SPEED
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