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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 r..................[:=> 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,
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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 after reducin..................[:=> 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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sate for both stator resistance drop and slip frequency. The scheme proposed fully compensates for the current±resistance (IR) voltage drop by vectorially modifying the stator voltage and keeping the magnitude of the ..................[:=> 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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motor approaches full speed. A VVVFD can be adjusted to produce a steady 150% starting torque from standstill right up to full speed while drawing only 150% current.
With a VVVFD, the stopping sequence is just the opposite as the starting sequence. The frequency and voltage applied to the motor are ramped down at a controlled rate. When the frequency approaches zero, the motor is shut off. A small amount of braking torque is available to help decelerate the load a little faster than it would stop if the motor were simply switched off and allowed to coast. Additional braking torque can be obta..................[:=> 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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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 resulting in energy savings...................[:=> Show Contents <=:]



Traction system Traction drives


Posted by: nitz456@gmail.com
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,
Please gi..................[:=> 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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M
Substrate area (mm2) 40 x 30 28.5 x 27.3
Inductance (nH) 10 3
Capacitance (pF) 4 20
No. of passive components 6 1
Volume of passives 173 82
No. of terminals 15 5
Volume of terminals 170 5
Total passive volume 343 87
System profile 20 10
System power density 1 X3.6
In IPEM, the volume of passive components is reduced to half of that in wire bonding and total passive volume is reduced to 1/3rd of that in wire bonding. Also the system power density is increased by a factor of 3.6.

ADVANTAGES AND DISADVANTAGES
There are several advantages for integrating power electronics system ..................[:=> Show Contents <=:]



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