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working of transformerless variable frequency drive


Posted by:
Created at: Thursday 11th of July 2013 04:08:44 AM
Last Edited Or Replied at :Thursday 11th of July 2013 04:08:44 AM
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i request to se..................[:=> Show Contents <=:]



slip energy recovery


Posted by: wrijul
Created at: Saturday 05th of November 2011 08:46:25 AM
Last Edited Or Replied at :Saturday 05th of November 2011 08:46:25 AM
slip energy recovery , slip, slip ring , slip power recovery, electric motors , induction machine, variable speed drives , wound rotor, speed control of induction motor , dc motors, dc motor , variable speed motors, wound rotor induction motor , induction motor, variable frequency drive , variable frequency drives, energy , recovery, slip energy recovery , slip power recovery, slip power recovery ppt , slip energy recovery in slip ring induction motor, slip recovery drives ppt , slip energy recovery project,
Hi this is Wrijul .... can anyone please help me with the project ..................[:=> Show Contents <=:]



feed control to reduce over speed


Posted by: Sasikumar9019
Created at: Thursday 10th of February 2011 12:48:13 PM
Last Edited Or Replied at :Thursday 10th of February 2011 12:48:13 PM
feed control to reduce over speed , speed drives, boiler feed , generator controller, boiler feed water system , chemical feed system, power plant control system , flow check valve, chemical feed systems , variable frequency, chemical feed , variable frequency drives, frequency drives , boiler feed water, variable speed drives , feed, control , reduce, over , speed, feed control to reduce over speed ,
i need to do a project in feed control during over speed and control the speed.feed could come normal..................[:=> Show Contents <=:]



SPEED CONTROL OF SYNCHRONOUS MOTOR BY USING VARIABLE FREQUENCY DRIVES


Posted by: project report helper
Created at: Saturday 25th of September 2010 12:58:36 AM
Last Edited Or Replied at :Saturday 25th of September 2010 12:58:36 AM
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PEED 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 compensa..................[:=> Show Contents <=:]



Variable Voltage And Variable Frequency drives full report


Posted by: seminar presentation
Created at: Tuesday 18th of May 2010 11:43:34 AM
Last Edited Or Replied at :Thursday 04th of October 2012 01:50:25 AM
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uency.
OPERATING PRINCIPLE
Variable frequency drives operate under the principle that the synchronous speed of an AC motor is determined by the frequency of the AC supply and the number of poles in the stator winding, according to the relation:

Where,
RPM = Revolutions per minute
f = AC power frequency (Hertz)
p = Number of poles (an even number)
Synchronous motors operate at the synchronous speed determined by the above equation. The speed of an induction motor is slightly less than the synchronous speed.
Example
A 4-pole motor that is connected directly to 60 Hz util..................[:=> Show Contents <=:]



variable frequency drive


Posted by: project report tiger
Created at: Monday 01st of March 2010 02:31:26 AM
Last Edited Or Replied at :Thursday 14th of October 2010 08:29:48 PM
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rement thus resulting in energy savings.


Presented By
JET AIR Technologies..................[:=> Show Contents <=:]



Traction system Traction drives


Posted by: [email protected]
Created at: Tuesday 16th of February 2010 02:39:22 AM
Last Edited Or Replied at :Saturday 18th of February 2012 04:33:39 AM
Traction system Traction drives , ac and dc motorsTraction, ac and dc motorsdc traction motor , variable speed drives, variable frequency drives , electric traction drives, electric motors , dc motors, variable frequency drive , dc motor, dc machines , electrical drives, electric drives , traction motor, dc traction motor , system, drives , traction system, traction system traction drives , traction drives,
Pl..................[:=> Show Contents <=:]



Integrated Power Electronics Module


Posted by: electronics seminars
Created at: Thursday 31st of December 2009 08:09:35 AM
Last Edited Or Replied at :Wednesday 19th of December 2012 11:56:45 PM
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o reduces the size, weight and cost of the power modules.

FEATURES OF IPEMS
The basic structure of an IPEM contains power semi conductor devices, control/drive/protection electronics and passive components. Power devices and their drive and protection circuit is called the active IPEM and the remaining part is called passive IPEM. The drive and protection circuits are realized in the form of hybrid integrated circuit and packaged together with power devices. Passive components include inductors, capacitors, transformers etc.
The commonly used power switching devices are MOSFETs and IGBTs..................[:=> Show Contents <=:]



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