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The relative speed between the rotor and stator in the induction motor is ______(a) Nr(b) Ns-Nr(c) Ns+Nr(d) 0This question was posed to me during an online exam.I want to ask this question from Induction Motors topic in division Braking of DC Motors & Induction Motors of Electric Drives

Answer»

Right choice is (a) Nr

Explanation: In INDUCTION motor rotor tries to catch up the stator MAGNETIC field in order to satisfy LENZ law. EFFECT opposes the cause. Stator remains at REST. The relative speed is Nr-0=Nr.



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