A variable-speed controller, for an existing 225 kW fixed-speed wind power generator, is presented in this paper. A sensorless direct torque control algorithm-based controller is proposed for the squirrel-cage induction generator. Generator torque reference is derived based on sensorless maximum power tracking mode algorithm, up to the base speed of the generator. A three-phase front-end converter is used here to deliver the generated power to the grid with unity-power-factor operation at all wind speeds. This algorithm is based on direct activ ....etc

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An electrostatic generator is a mechanical device that produces continuous current . The knowledge of static electricity dates back to the earliest civilizations, but for millennia it remained merely an interesting and mystifying phenomenon. The development of electrostatic machines did not begin in earnest until the 18th Century. Electrostatic generators operate by using manual (or other) power to transform mechanical work into electric energy. Electrostatic generators develop electrostatic charges of opposite sign rendered to divided conducto ....etc

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The superconducting generator using super conductors in field winding is superior to conventional generator in terms of power system stability, generator efficiency, generator dimensions and weight. They have been expected as a key generator technology to realize large capacity more them 1GVA.. Recently for then advantages are pointed out compared to conventional generator like small internal impedance that is effective to make system voltages in deregulated power system. These technical merits have pushed the development of superconducting gen ....etc

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Can i get a pdf reruading the topic magnetless motor? and if i need still more information reguarding where will i get it ....etc

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Abstract

An electromagnetic generator without moving
parts includes a permanent magnet and a magnetic core including first
and second magnetic paths. A first input coil and a first output coil
extend around portions of the first magnetic path, while a second input
coil and a second output coil extend around portions of the second
magnetic path. The input coils are alternatively pulsed to provide
induced current pulses in the output coils. Driving electrical current
through each of the input coils reduces a level of flux from the
per ....etc

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Hi,
Myself Dixit Prajapati. I am studying in final year of electrical engg. in M S University. I want to make a project on magnetless motor.so i want proper abstracts,full technical details,full references.
so please help me .send me on [email protected] ....etc

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Variable-reluctance (VR) or switched-reluctance (SR) motors also can operate as brushless dc motors. VR motors have salient poles on a soft-iron rotor. Motor action results from interaction between the rotor poles and a rotating field set up by the stator windings. The construction yields high torque-to-inertia ratios.

VR motors cost less than corresponding permanent-magnet brushless types. And because VR types call for unidirectional current, amplifiers for them cost less than those for conventional types. The motors are increasingly used ....etc

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A technique for on-line detection of incipient faults in the windings of turbine - generator rotors has been developed based on the twin signal sensing method. To detect the developing shorts in any winding, two identical pulses are applied to both ends f the winding and are reflected back .Any abnormality in the winding results in the applied signals being reflected through nonsymmetrical circuits. The difference between the reflected signals are amplified and used as signature signal for further processing. This paper describes the developmen ....etc

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The superconducting generator using super conductors in field winding is superior to conventional generator in terms of power system stability, generator efficiency, generator dimensions and weight. They have been expected as a key generator technology to realize large capacity more them 1GVA.. Recently for then advantages are pointed out compared to conventional generator like small internal impedance that is effective to make system voltages in deregulated power system. These technical merits have pushed the development of superconducting gen ....etc

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