Induction Motor stator is shorted and rotor has supply

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parameswararaob Participant Join Date: Jan 2008 Posts: 2	Induction Motor stator is shorted and rotor has supply 01/17/2008 8:14 AM
	Hi, Can any body explain , In a Three phase wound rotor Induction motor ,Three phase supply is given to the rotor and stator winding is short circuited. then 1.whether the rotor would run in the direction of the rotating field or against the direction of rotating field why? 2.The frequency of the stator currents would be...
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: Induction Motor stator is shorted and rotor has supply 01/17/2008 9:45 AM
	<...stator winding is short circuited...> __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Shawn_V_Elect Power-User Join Date: Jan 2008 Location: Silvis, IL (Quad Cities) Posts: 141 Good Answers: 5	#2 Re: Induction Motor stator is shorted and rotor has supply 01/17/2008 5:01 PM
	Quote from above "Three phase supply is given to the rotor" no, the three phase supply is connected to the stator, the rotor is the one that turns.... Unless you are thinking of trying to apply power through the sliprings of a wound rotor motor... which would be a bad idea in so many ways I won't even go into it. The rotating field of the stator induces an electrical current in the rotor which produces a magnetic field. The rotor then follows the rotating field of the stator trying to catch up to it. If you want to change the direction of the motor you need to change any two of the hot wires around. (NOT the ground wire and make sure power is removed first) Hope that is some help. __________________ Perfection is achieved, not when there is nothing left to add, but when there is nothing else to take away
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parameswararaob Participant Join Date: Jan 2008 Posts: 2	#3 In reply to #2 Re: Induction Motor stator is shorted and rotor has supply 01/17/2008 10:56 PM
	Thank 4 u r replay. I am not trying to rotate the motor in this way. This is one of the question asked in the competitive examination thats why I asked?
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JRaef Guru Join Date: Sep 2006 Location: California, USA, where the Godless live next door to God. Posts: 4665 Good Answers: 804	#4 In reply to #3 Re: Induction Motor stator is shorted and rotor has supply 01/18/2008 12:30 AM
	So, rather than investigate, formulate and postulate, you delegate to a group of anonymous computer geeks. You must be in school for a management degree, not an engineering degree. __________________ All I every really wanted to be, was... A LUMBERJACK!.
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DHARMARAJEN Active Contributor Join Date: Dec 2007 Location: Mauritius Posts: 17	#5 Re: Induction Motor stator is shorted and rotor has supply 01/27/2008 12:58 AM
	If power is supply to the wound rotor via the slipring and the stator is short and one more condition is that the rotor could stand the voltage supply. The rotor will turn in the opposite direction, since the stator will not be able to turn (stator laying down). If the rotor was suspended, then the stator will turn in the required direction. The wound rotor motor is same as a transformer, and short circiut test is done to it at nominal current at primary. __________________ DS
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