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thanhdd
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Joined: 19-August 07
Profile Views: 258*
Last Seen: 1st May 2008 - 07:09 PM
Local Time: Dec 3 2008, 12:11 AM
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1 May 2008
In Induction Generator Double Fed(DFIG), stator connect Dyn when wind speed (speed of prime mover) is high; stator connect Star when wind speed (speed of prime mover) is low. This reduce flux level and magnetizing losses. Why?
2 Mar 2008
I don't understand the operated principle of DFIG (induction generator double-fed). Can anyone help me understand : "when DFIG starts, where does DFIG receive electric energy from? (from grid(stator) or from converter)" because when DFIG starts, stator directly connected to grid, rotor also connected to grid via converter while speed below synchronous.
Help me!
13 Nov 2007
I have an induction motor 40kW Wye/Delta 380/220
Star/Delta starters I=P/(rt3.U.efficiency.cos) U= 380 or 220 ? Help me!
25 Sep 2007
I'm sorry!
There is my question: Two induction motors, which is larger if they are same power and voltage but different frequency? Can two wire machine convert kinds of others wire machine? And reverse? What is Space harmonic wave? How does it distribute in time? What is Time harmonic wave? How does it distribute in space?
25 Sep 2007
Two induction motors, which is larger if they are same power and voltage?
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Lo-Fi Version | Time is now: 2nd December 2008 - 11:11 PM |
2 Mar 2008 - 18:15