Wiktionary
repulsion motor
n. an alternating current commutator motor, designed for single-phase operation, in which the armature is supplied by induction from the field of the stator winding
Wikipedia
Repulsion motor
A repulsion motor is a type of electric motor for use on alternating current (AC). It was formerly used as a traction motor for electric trains (e.g. SR Class CP and SR Class SL electric multiple units) but has been superseded by other types of motors. Repulsion motors are classified under single phase motors. In repulsion motors the stator windings are connected directly to the AC power supply and the rotor is connected to a commutator and brush assembly, similar to that of a direct current (DC) motor.