The induction motor always runs at speed less than its synchronous speed. The rotating magnetic field

produced in the stator will create flux in the rotor, hence causing the rotor to rotate. ... Single phase induction motors arenot a self-starting motor, and three phase induction motor are a self-starting motor.

Is induction motor not self starting?

We can easily conclude that the single-phase induction motors are not self-starting because the produced stator flux is alternating in nature and at the starting, the two components of this flux cancel each other, and hence there is no net torque.

Does an induction motor start?

A three-phase Induction Motor is Self Starting. When the supply is connected to the stator of a three-phase induction motor, a rotating magnetic field is produced, and the rotor begins rotating and the induction motor starts.