Effect of variable slip rotor impedance on the performance of singly excited three phase induction motor

When operating three phase induction motor with single phase supply the motor behavior becomes complicated, owing to the emergence of negative and zero sequence components in winding currents. This paper analyzes the behavior of small rating three phase induction motor connected to one phase supply taking into account the variation of rotor resistance with slip for different stator connections. The proper capacitor required for canceling negative sequence component of stator winding voltages is dependent on the rotor resistance and slip values and this capacitance differ for each connection.