i have got topic as variable frequency transformer as my seminar topic ..so please provide information in simple language with ppt also


i have got topic as variable frequency transformer as my seminar topic ..so please provide information in simple language with ppt also



send me info or link
on [email protected] ....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 cage induction motors are very economical but their spee ....etc

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

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please tell me working of piano using IC555.
please tell me working of piano using IC555 ....etc

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to get information about the topic variable frequency transformer full report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-variable-frequency-drive

http://seminarsprojects.net/Thread-variable-voltage-and-variable-frequency-drives-full-report ....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 all DC motors operate.
....etc

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please do send me the ppt of the project(pendrive to pendrive data transfer without using pc) ....etc

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SPEED CONTROL OF SYNCHRONOUS MOTOR BY USING VARIABLE FREQUENCY DRIVES

ABSTRACT :

A novel open-loop speed control method for induction motors that provides high output torque and nearly zero steady-state speed error at any frequency is presented. The control scheme is based on the popular constant volts per hertz (V/f) method using low-cost open-loop current sensors. Only stator current measurements are needed to compensate for both stator resistance drop and slip frequency. The scheme proposed fully compensates for ....etc

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

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