Repulsion Electric Motor
By definition this is a single phase motor which has a stator winding arranged for connection to the source of power and a rotor winding connected to a commutator. Brushes and commutators are short-circuited and are placed so that the magnetic axis of the rotor winding is inclined to the magnetic axis of the stator winding. It has a varying speed characteristic, a high starting torque, and moderate starting current.
Due to its low power factor except at high speeds, it can be modified into a compensated repulsion motor, which has another set of brushes placed midway between the short-circuited set and this added set is connected in series with the stator winding’s.