In a 3 phase induction motor(without connecting supply) if we
rotate its rotor by hand and check resistance of stator
winding at motor terminal box its resistance varies why ??
Answers were Sorted based on User's Feedback
Probably due to the voltage induced by residual magnetism of
the rotor
| Is This Answer Correct ? | 10 Yes | 5 No |
Answer / pasuvaraj.k@gmail.com
Sure the resistance wont varies in induction motors
| Is This Answer Correct ? | 1 Yes | 2 No |
Answer / shireesha.h
Hear the rotor is rotating with some speed so the rotor will
generate voltage and the resistance is varieng
| Is This Answer Correct ? | 0 Yes | 2 No |
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I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.
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