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Title: 555 timer variable frequency astable multivibrator
Page Link: 555 timer variable frequency astable multivibrator -
Posted By: ananya mohanty88
Created at: Thursday 05th of October 2017 05:24:33 AM
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Title: ppt on detecting power grid synchronization failure on sensing frequency or voltage
Page Link: ppt on detecting power grid synchronization failure on sensing frequency or voltage -
Posted By: Electrical Fan
Created at: Thursday 17th of August 2017 05:59:44 AM
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Detecting Power Grid Synchronization Failure

Tarun Agarwal
Synchronization means the minimization of difference in voltage, frequency and phase angle between the corresponding phases of the generator output and grid supply. An alternating current generator must be synchronized with the grid prior to connection. It can t deliver the power unless it is running at same frequency as the network. Synchronization must occur before connecting the generator to a grid. Synchronization can be achieved manually or automatically. The purpose of synchr ....etc

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Title: working of transformerless variable frequency drive
Page Link: working of transformerless variable frequency drive -
Posted By: rajanpatel
Created at: Thursday 17th of August 2017 05:34:25 AM
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Title: variable frequency drive
Page Link: variable frequency drive -
Posted By: teamone2010
Created at: Thursday 17th of August 2017 08:21:05 AM
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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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Title: variable frequency transformer pdf
Page Link: variable frequency transformer pdf -
Posted By: vishnuya
Created at: Thursday 05th of October 2017 04:53:24 AM
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Title: Variable Voltage And Variable Frequency drives full report
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Posted By: rasikarajagopal
Created at: Thursday 05th of October 2017 05:03:19 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 cage induction motors are very economical but their spee ....etc

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Title: variable frequency transformer ppt
Page Link: variable frequency transformer ppt -
Posted By: gupta_ankur128
Created at: Thursday 17th of August 2017 05:20:42 AM
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Title: pdf of variable voltage and variable frequency
Page Link: pdf of variable voltage and variable frequency -
Posted By: rasikarajagopal
Created at: Thursday 05th of October 2017 04:21:40 AM
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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: luv2satya
Created at: Thursday 17th of August 2017 06:54:27 AM
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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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Title: Orthogonal Frequency Division Multiplexing Frequency Offset Correction full report
Page Link: Orthogonal Frequency Division Multiplexing Frequency Offset Correction full report -
Posted By: nagraj
Created at: Thursday 17th of August 2017 08:26:23 AM
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A Technique for Orthogonal Frequency Division Multiplexing
Frequency Offset Correction

Abstract:
The Orthogonal Frequency Division Multiplexing (OFDM) is a Multi Carrier Modulation technique employing Frequency Division Multiplexing of orthogonal subcarriers. It is also sometimes called as discrete multitone modulation (DMT). It is better than CDMA in high bit rate and Broadband Communications .It is a multi carrier technique, which is very sensitive to Frequency Offset between transmitter and receiver. Th ....etc

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