Which speed control method can only be applied to squirrel cage type induction motors?

Which speed control method can only be applied to squirrel cage type induction motors? Correct Answer Multiple Stator winding method

Multiple stator winding method can only be applied to squirrel cage type induction motors. Other all speed control methods can also be applied in slip ring type induction motors. Rotor rheostat speed control method can only be used for controlling the speed of slip ring type induction motors.

Related Questions

Variable speed motors especially N.E.M.A. B squirrel cage A.C. induction motors might be operated by __.