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Title: variable frequency drive
Page Link: variable frequency drive -
Posted By: project report tiger
Created at: Monday 01st of March 2010 04:31:26 PM
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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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Title: Variable Voltage And Variable Frequency drives full report
Page Link: Variable Voltage And Variable Frequency drives full report -
Posted By: seminar presentation
Created at: Wednesday 19th of May 2010 12:43:34 AM
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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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Title: variable frequency transformer ppt
Page Link: variable frequency transformer ppt -
Posted By:
Created at: Monday 14th of July 2014 12:18:37 PM
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Title: SPEED CONTROL OF SYNCHRONOUS MOTOR BY USING VARIABLE FREQUENCY DRIVES
Page Link: SPEED CONTROL OF SYNCHRONOUS MOTOR BY USING VARIABLE FREQUENCY DRIVES -
Posted By: project report helper
Created at: Saturday 25th of September 2010 02:01:38 PM
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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 resista ....etc

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Title: variable frequency transformer pdf
Page Link: variable frequency transformer pdf -
Posted By:
Created at: Thursday 04th of October 2012 10:37:25 AM
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Title: Discrete Variable Frequency Soft Starting on DSP-based Voltage Controller-Fed
Page Link: Discrete Variable Frequency Soft Starting on DSP-based Voltage Controller-Fed -
Posted By: seminar class
Created at: Thursday 05th of May 2011 01:45:10 PM
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Discrete Variable Frequency Soft Starting on DSP-based Voltage Controller-Fed IM Drive
Abstract
GThyristorized soft starters are being used as inductionmotor starters in fan or pump drives, ere, the principleofwhich is based on the control of variable voltage and constantfrequency. One ofthe demerits of the soft starters is that a smallreduction in voltage produces a considerable drop in electromagnetictorque, which may cause the motor with loads failureto start. A new control strategy is proposed to improve electromagnetictorque at s ....etc

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Title: pdf of variable voltage and variable frequency
Page Link: pdf of variable voltage and variable frequency -
Posted By:
Created at: Tuesday 16th of October 2012 03:30:59 PM
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Title: variable frequency drive using microcontroller
Page Link: variable frequency drive using microcontroller -
Posted By:
Created at: Tuesday 16th of April 2013 02:04:30 AM
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Title: 555 timer variable frequency astable multivibrator
Page Link: 555 timer variable frequency astable multivibrator -
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Title: SPEED CONTROL OF SYNCHRONOUS MOTOR BY USING VARIABLE FREQUENCY DRIVES
Page Link: SPEED CONTROL OF SYNCHRONOUS MOTOR BY USING VARIABLE FREQUENCY DRIVES -
Posted By: project report helper
Created at: Saturday 25th of September 2010 01:58:36 PM
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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 d ....etc

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