In the squirrel-cage induction motor the rotor slots are usually given slight skew__________?
Correct answer: A. to reduce the magnetic hum and locking tendency of the rotor
- A. to reduce the magnetic hum and locking tendency of the rotor
- B. to increase the tensile strength of the rotor bars
- C. to ensure easy fabrication
- D. none of the above
Explanation
Skewing the rotor slots reduces magnetic cogging, locking and objectionable humming by preventing the rotor teeth from aligning simultaneously with the stator field. It also helps reduce torque pulsations.
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