Question

how does induction motor starts

Answer 1

A three phase induction machine will start without any additional components. However, it will have a very large inrush current. Sometimes a starter is used in which the voltage to the motor is gradually increased. This reduces the inrush current.

Answer 2

Induction motor is a self starting motor an can able to create revolving magnetic fields o you can start a induction motor without using any starter and a motor cannot start if there is no rotating magnetic field