If speed of rotating flux and actual speed of rotor is same then what will be the torque produced in three phase induction motor and why?
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\$\begingroup\$ A quick answer: the torque will be zero. \$\endgroup\$– Marko BuršičCommented Sep 10, 2017 at 11:56
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2 Answers
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If the rotor's frequency matches that of the stator (assuming polecount has already been considered) there will be no torque produced.
Induction machines are also referred to as asynchronous machines
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If the rotor and the field are rotating at the same speed then how much actual induction is occurring (How often does the rotor cut a line of flux from the windings)?
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\$\begingroup\$ I don't think this qualifies as an answer. If it is a hint it's a bit obscure and should be converted to a comment. \$\endgroup\$ Commented Sep 10, 2017 at 12:16
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\$\begingroup\$ I didn't think it was that obscure as a hint, I mean the guy is clearly studying electrical machines and electromagnetism, so the words should have meaning? What I did not want to do was just answer a clearly homework question, there is no learning in that. I would not however be adverse to converting to a comment, as I initially thought I was going to write rather more, but could not come up with a more verbose way to point to a solution without actually giving it. \$\endgroup\$ Commented Sep 10, 2017 at 12:23