Depends on the motor and application. Permanent split capacitor types are the ones that can be considered. Motors with centrifugal switches are not suitable. However, speed control techniques in 1-ph motors usually result in reduced torque. Thus they can be used where precision position control is not required or where speed control with high torque is not needed. Reversal can be achieved through reversal of either the main or auxiliary winding connection.

AC motors are used in Servomechanism.....