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Mr. Dubey • 89.38K Points
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Q. The rotor of 3-phase slip ring induction motor is fed from a 3-phase supply with its stator winding short circuited having rotor rotating clockwise at a speed of Nr, then the

  • (A) speed of air gap field w.r.t. stator is ns-nr anticlockwise
  • (B) speed of air gap field w.r.t. stator is ns-nr clockwise
  • (C) speed of airgap field w.r.t rotor is ns clockwise
  • (D) speed of airgap field w.r.t. stator is ns-nr clockwise
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Explanation by: Mr. Dubey
the air gap field of stator = - (ns-nr).

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