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Posted by: summer project pal
Created at: Friday 07th of January 2011 10:22:07 PM
Last Edited Or Replied at :Friday 14th of January 2011 04:48:17 AM
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e problems with creep and slip that have plagued CVTs for years .

This inherent flaw has directed research and development toward push belt CVTs.

2.3 Inherent Advantages & Benefits
Certainly, the clunk of a shifting transmission is familiar to all drivers. By contrast, a continuously variable transmission is perfectly smooth—it naturally changes “gears” discreetly and minutely such that the driver or passenger feels only steady acceleration. In theory, a CVT would cause less engine fatigue and would be a more reliable transmission, as the harshness of shifts and discrete gea..................[:=> 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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ring operation, (v/f) ratio is increased at low frequencies.
The variable frequency control provides a good running and transient performance because of following features:-
1. Speed control and braking operations are available from zero to above base speed operations.
2. During transient (starting, braking and speed reversal) the operation can be carried out at t the max. torque while reduced current giving good dynamic response.
3. Cu. Losses are low, the efficiency and power factor are high as the operation is restricted b/w syn. Speed and max. Torque point at all frequencies.
4. Drop..................[:=> Show Contents <=:]

FAULT analysis at a wind power plant for one year of observation

Posted by: project topics
Created at: Wednesday 14th of April 2010 01:33:54 PM
Last Edited Or Replied at :Wednesday 14th of April 2010 01:33:54 PM
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ity has become a key criterion for wind integration. This paper analyzes the fault characteristics observed at a wind power plant, and the behavior of the wind power plant under fault events. The focus of observation is a wind power plant monitored in the Electric Reliability Council of Texas (ERCOT) control area. The wind power plant is monitored during fault events for a period of one year. The fault events are actual faults occurring naturally in the surrounding wind power plants.

Presented By:
Muljadi, E. Mills, Z. Foster, R. Conto, J. Ellis, A.
Nat. Renewable Energy Lab., Golden..................[:=> Show Contents <=:]

automatic speed controller for fans and coolers

Posted by: harshit12
Created at: Friday 26th of March 2010 07:01:57 AM
Last Edited Or Replied at :Monday 08th of October 2012 04:47:23 AM
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please upload ..................[:=> Show Contents <=:]

automatic speed cantrol system in 4 wheelers

Posted by: vijaysai315
Created at: Tuesday 09th of March 2010 01:19:37 PM
Last Edited Or Replied at :Tuesday 09th of March 2010 01:19:37 PM
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please..................[:=> 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
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Please give me some project idea on traction system or traction drives . also if possible ..................[:=> Show Contents <=:]


Posted by: seminar projects crazy
Created at: Friday 30th of January 2009 12:44:28 PM
Last Edited Or Replied at :Friday 04th of February 2011 08:52:18 AM
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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 has used valves which increased system pressure, inherently waste energy and cause pump to op..................[:=> Show Contents <=:]

Sensorless variable-speed controller for fixed-speed wind power generator

Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:54:30 PM
Last Edited Or Replied at :Sunday 21st of September 2008 12:54:30 PM
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xed-speed wind power generator, is presented in this paper. A sensorless direct torque control algorithm-based controller is proposed for the squirrel-cage induction generator. Generator torque reference is derived based on sensorless maximum power tracking mode algorithm, up to the base speed of the generator. A three-phase front-end converter is used here to deliver the generated power to the grid with unity-power-factor operation at all wind speeds. This algorithm is based on direct active and reactive power control. The experimental waveforms from the actual installation site are presented..................[:=> Show Contents <=:]

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