So what is a self-starting motor? When the motor starts running automatically without any external force applied to the machine, then the motor is referred to as 'self-starting'. For example, we see that when we put on the switch the fan starts to rotate automatically, so it is a self-starting machine.

Which electrical motor is a self start motor?

The current carrying rotor being placed in a magnetic field experiences a torque and hence begins to rotate in the direction of rotating magnetic field. Thus we see that Induction Motor is self-starting.

How do you make a motor self-starting?

To make it self-starting, it can be temporarily converted into a two-phase motor while starting. This can be achieved by introducing an additional 'starting winding' also called as auxillary winding. Hence, stator of a single phase motor has two windings: (i) Main winding and (ii) Starting winding (auxillary winding).