Matches 51 - 100 out of 226 < 1 2 3 4 5 >
Match Document Document Title
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...
5065086 Engine driven generator  
An engine driven generator having an engine, a three-phase synchronous generator to be driven by the engine, a direct current power supply for actuating the engine, a direct current/alternating...
5043653 Noise filter for zero crossing detector  
A noise filter for the zero crossing detector of a digitized sine wave signal uses an adjustable noise integrator. The noise integrator incorporates a counter. The integration characteristic of the...
5039932 Integrated variable reluctance generator for air frames  
An alternating current generating system (40) for an air frame producing an output potential in accordance with the invention includes a generator (42) for generating current having a rotor (46)...
5028804 Brushless doubly-fed generator control system  
An energy conversion generation system receives energy from a resource and converts the energy into electrical power for supply to a polyphase electric power grid operating at a system frequency. A...
5023537 Low frequency feeder fault protection  
The problem of detecting low frequency faults is solved in a VSCF control system which is operated in a start mode to start an engine (18) using a brushless synchronous generator operating as a...
5019718 Frequency insensitive digital phase angle measuring circuit  
The problem of stabilizing operation of a load division control (74) is resolved using a phase angle counter circuit (90) which calculates phase angle insensitive to frequency changes of the output...
4992920 Regulated AC power system energized by variable speed prime mover  
A three phase alternator is driven by a variable speed prime mover, and its rectified output is pulse width modulated by a gate controlled H-bridge power switch circuit. Predetermined pairs of...
4956598 Low distortion control for a VSCF generating system  
Prior variable speed constant frequency (VSCF) generating systems which utilize an inverter to derive constant frequency power from variable frequency power developed by a generator driven by a...
4953052 Pole slip protection circuit for paralleled generators  
A protection system (80) for a first generator unit (12) connectible by a first switch (24) to a power generating system having at least one additional generator unit with the at least one...
4926108 Variable speed/variable voltage generator set  
A motor-generator set for producing, within a predetermined range, a constant volts/hertz output from the generator. An engine drives an AC generator, the engine having an electronic speed...
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...
4906060 Apparatus and method for controlling the output frequency of a wind-driven alternator  
Method and apparatus for controlling the output frequency of an alternator by maintaining a relatively constant speed of rotation of the alternator rotor are disclosed. The rotor includes an...
4871960 Output voltage control system for an electric generator  
An output voltage control system for an electric generator having two field windings, wherein a rotary shaft of the generator is rotated by a power source such as an engine, for producing an output...
4870339 Variable-speed power generating system  
A variable-speed power generating system comprises a variable-speed generator electrically connected at its primary winding to an electric power system and its secondary winding to the electric...
4841218 Electronic controller and a system and method for optimizing generation of electrical power utilizing the same  
In a system comprising an asynchronous generator rotatable at variable speeds, and a main electrical network carrying power at a substantially constant voltage and frequency, the improvement...
4806841 Constant speed and frequency generating system  
An output frequency control circuit is mounted on the rotating shaft connecting a motor and generator. The motor-generator system includes exciter circuits, an input power factor control and an...
4777425 Alternator voltage regulator with speed responsive control  
A voltage regulator for a diesel engine driven alternator includes speed dip control permitting engine recovery, and a voltage signal circuit and a speed signal circuit producing a linear volts per...
4701691 Synchronous generators  
In a compound electromechanical assembly having a first singly fed stage mounted for common rotation with a second singly fed stage mounted for common rotation with a second singly fed stage...
4697135 Electronic voltage regulator  
An electronic voltage regulator for an ac electric generator precisely controls the generator output voltage and enhances motor starting ability. A filtered dc representation of the output voltage...
4668872 Electronic control system for a diesel engine, generator and electric motor power train  
The inventive control system introduces the current (ΔI) and voltage (ΔC) deviations simultaneously with the injection set point (C) to define a new injection set point (C') that is utilized in...
4661761 Internal combustion engine electrical system  
An internal combustion engine electrical system is disclosed which is adapted to use an internal combustion engine as a driving source. The generating system is constructed in a manner such that...
4645940 Interrupt-free, unregulated power supply  
A primary and at least one backup alternating voltage source are coupled to a common load to provide interrupt free electric current to the load through a simplified interconnecting network. Phase...
4628245 Multipolar excitation systems  
A D.C. excited rotor winding arrangement for a dynamoelectric machine comprises at least one closed loop (1,2,3) of three or more series-connected winding sections...
4625160 Variable speed constant frequency generating system  
A variable speed constant frequency generating system for generating constant frequency electrical output power from a variable speed source of motive power includes an exciter for generating...
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...
4533863 Voltage regulator  
A voltage regulator is described adapted for use controlling the output of an AC generator. A voltage control field-winding excitation control circuit supplies direct current to the generator field...
4511807 Electrical generator control system  
A control system for a stand-alone electrical generator driven by a prime mover such as a wind turbine in which switches are operable in response to changes in the frequency of the generator output...
4510433 Variable-speed constant-frequency alternator  
A variable-speed constant-frequency alternator compensating for changes in speed of the prime mover by electromagnetically rotating the rotor's magnetic poles around the rotor. If the prime mover...
4472673 Rotating electric machine with speed/frequency control  
A rotating electric machine comprising a stator 1 and a rotor 5 which is adapted to be rotated about an axis and which is disposed opposite said stator 1. Normally, the magnetic field of the rotor...
4471286 Closed-loop frequency regulated generator apparatus  
In a motor-generator set, the frequency of the AC generator outputted voltage is automatically adjusted by field winding regulation of the DC motor, through a closed loop in which a dual-slope...
4451777 Static VAR generation for transmission line compensation  
There is provided a static VAR generator having voltage regulation in combination with the capability to damp subsynchronous resonance should it occur. A novel method for controlling subsynchronous...
4442385 Variable frequency drive for a motor-generator/alternator set  
A variable frequency drive for a motor-generator/alternator set which is used to supply electrical power to computer or data processing equipment. Power failures in commercially supplied power...
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...
4415848 Alternating current power source apparatus for car  
An alternating current power source apparatus comprises an AC generator having a field coil which is driven by an engine; a first rectifier having one or more thyristors which rectify the AC output...
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...
4412171 Circuit arrangement for damping power oscillations of synchronous generators in networks  
The input signal corresponding to the respective frequency or power variation is supplied both to the inputs of the discrete filters and to angle measuring devices assigned to them, of which only...
4412170 Motor-generator system providing prolonged uninterrupted power supply to a load  
The present invention relates to a generator system connected to an external A.C. power source for supplying electrical A.C. power to a load for prolonged periods when the external electrical A.C....
4410848 System for maintaining excitation of an alternator during excessive output current conditions  
A system for supplying power to a field winding to maintain excitation of an alternating current generator during excessive output current conditions, the generator having a plurality of output...
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...
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...
4387335 Constant-frequency dynamo with stationary armature  
A dynamo with a stationary armature and with two rotors, with the frequency of the armature current the same as the frequency of the field excitation and independent of the speed of rotation of the...
4371828 Autonomous electrical power generator  
A generator set includes a prime mover and a three-phase asynchronous electrical machine coupled to this prime mover and acting as a generator. In addition, at least one set of three...
4366388 Energy utilization circuit and method  
An energy utilization circuit and method energizes a.c. loads with a.c. power of conventional voltage and frequency characteristics. A coverter responsive to an energy source, typically a wind or...
4344027 Frequency regulator for synchronous generators  
The present invention is directed to a novel frequency regulator which controls a generator output frequency for variations in both the input power to the generator and the power supplied to an...
4308465 Frequency control for paralleled AC systems  
A frequency control utilizing a reference oscillator and a signal controlled oscillator is disclosed. The frequency control maintains the frequency of an output signal at the same frequency as the...
4246531 Constant frequency variable rpm generator  
A prime mover delivers rotational torque to a generator having an exciter and a main unit connected sequentially along the prime mover output shaft. A voltage sensor is connected to the generator...
4229689 AC Synchronized generator  
An AC synchronized generator includes an exciter stage and a generating stage, the exciter stage comprising an exciter stator connected for excitation to any conventional AC source and an exciter...
4219768 Method for regulating the voltage of an electric generator and a system for the application of said method  
The method for regulating the terminal voltage delivered by an independent alternating-current generator consists in measuring the voltage in at least one phase, in measuring and automatically...
4177414 Controllable voltage A.C. generator system  
This invention relates to a generator system for generating a readily controllable A.C. of a selected potential and of a substantially constant selected frequency, which system comprises a first,...
Matches 51 - 100 out of 226 < 1 2 3 4 5 >