i request to sent me the working of transformerless variable frequency drive ....etc

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VARIABLE SPEED DC MOTOR DRIVE


DC MOTOR THEORY:
Inducing a Force on a Conductor.
There are two conditions which are necessary to produce a force on a conductor:
i. The conductor must be carrying current.
ii. The conductor must be within a magnetic field.
When these two conditions exist, a force will be applied to the conductor, which
will attempt to move the conductor in a direction perpendicular to the magnetic
field. This is the basic theory by which a ....etc

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pls send variable frequency drive using microcontroller ppt ....etc

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Variable Frequency Drives

Introduction
¢ Variable Frequency Drives are devices which control the speed of alternating current(AC) electric motors by controlling the frequency of the supply voltage of the motor. ¢ Motor-driven systems are designed to handle peak loads. If the system is running at a reduced load for some period of time, it will lead to energy inefficiency. ¢ With Variable frequency drives and the ability to adjust the speed of the motor, enables you to match the motor output to load requirement ....etc

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Variable Voltage And Variable Frequency drives

Presented By:
P.NATARAJU S.E.V.S.RAGHU VARMA
3rd year E.E.E. 3rd year E.E.E.

Abstract:-
Our varying industrial needs demand more precise control of the outputs of our basic electrical prime movers i.e, THE MOTORS. Basically dc motors are easy to control compared to their ac counter parts, but they have their own limitations with increase in capacity. Conversely ac motors in particular squirrel cag ....etc

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i need this pdf file can you please make it available for me. thanx ....etc

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i need a complete details about ECM in a automobile,its functioning,about different sensors in a vehicle and their functioning,how to identify their failure and repair it ....etc

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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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ppt related to induction motor drive using seven level multi level inverter for energy saving in variable torque load applications
PPT RELATED TO INDUCTION MOTOR DRIVE USING SEVEN LEVEL MULTI LEVEL INVETER FOR ENERGY SAVING IN VARIABLE TORQUE LOAD APPLICATIONS ....etc

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We are looking for companies that can provide us maintanence and startup for 2 anocut ecm machines. We also need a producer of ecm electrodes and possibility of training of our people.
Mail: [email protected]

....etc

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