> how can possible to change direction in single phase motor? so possible to
> change phase like dc motor that is possible.
To run a single-phase AC motor, it is necessary to use a capacitor between the motor and the input voltage. One winding is connected directly across the supply while the other windings are connected to the supply and capacitor. Therefore, how the capacitor is connected and to which side the capacitor is connected to the supply will determine the direction the AC motor will run.