The Stator of single phase induction motor houses two windings
1. Main (Running) winding 2. Auxiliary (Starting ) winding
Rotor of single phase induction motor is squirrel cage type These motors works on the principle of induction i.e. an emf is induced in the short circuited rotor circuit & the short circuit current makes the rotor to follow the stator magnetic field which is rotating. These motors are not self-starting. To make them self-starting auxiliary winding is used. The auxiliary winding may be more resistive, capacitive than main winding. A centrifugal switch may be connected in series with starting winding or a capacitor may be permanently connected in series with Auxiliary (Starting ) winding.