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Title: how does the magnetic levitation train work ppt
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Title: variable frequency transformer ppt
Page Link: variable frequency transformer ppt -
Posted By: gupta_ankur128
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Title: VARIABLE SPEED DRIVES VSD
Page Link: VARIABLE SPEED DRIVES VSD -
Posted By: Revathy
Created at: Thursday 05th of October 2017 03:51:06 AM
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Every kW of energy saved is as good as same amount of energy generated. Such is the scarcity of energy in India. Energy can be saved by using Variable Speed Drives (VSD) for applications like Pumps and Fans. Employing conventional techniques, which uses a motor running at full speed and flow pressure being created by throttle valve, a lot of energy is wasted due to electric, thermal and mechanical losses. By replacing conventional arrangement with AC drives, tremendous amount of energy can be saved. However, traditional approach to flow control ....etc

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Title: difference between chopper fed drives and converter fed drives pdf
Page Link: difference between chopper fed drives and converter fed drives pdf -
Posted By: mails4sarin
Created at: Thursday 17th of August 2017 08:33:33 AM
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difference between chopper fed drives and converter fed drives pdf

If the source of supply is d.c. (for example in a battery vehicle or a rapid transit system) a chopper-type converter is usually employed. The basic operation of a single-switch chopper was discussed in topic 2, where it was shown that the average output voltage could be varied by periodically switching the battery voltage on and of for varying intervals. The principal difference between the thyristor-controlled rectifier and the chopper is that in the former the motor current ....etc

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Title: CHAIN DRIVES IN LOW TORQUE DRIVES AND REDUCING PULSATIONS
Page Link: CHAIN DRIVES IN LOW TORQUE DRIVES AND REDUCING PULSATIONS -
Posted By: bitatr
Created at: Thursday 17th of August 2017 06:32:31 AM
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CHAIN DRIVES IN LOW TORQUE DRIVES AND REDUCING PULSATIONS
INTRODUCTION TO DRIVES

Mechanical components used for power transmission. It may be belt, chain or gear depending on engine design parameters like - Distance between crankshaft and camshaft, engine maximum speed, engine-torque and engine construction cost. - Power transmission is done from one shaft to another shaft which may or may not rotate at same speed.

CHAIN DRIVES ....etc

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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: 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: how does a griposcope work
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Posted By: netbug
Created at: Thursday 05th of October 2017 04:11:10 AM
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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: 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: 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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