The motor is an induction motor, once commonly known as a squirrel cage motor because of the construction of its rotor. Nowadays nearly all industrial-type, long life AC motors are induction motors. However if they are single phase, they will not self-start since they lack the rotating electrical field of a three phase induction motor. Single phase induction motors require some kind of special arrangement to start them rotating, then the starting apparatus is no longer required. For reasons of cost and durability, the starting apparatus is nearly always a starting-winding fed by a capacitor, turned on and off by a centrifugal switch so the extra winding was only powered up during starting.
The repulsion induction single phase motors used a different arrangement for starting, instead of the capacitor and extra winding. Frankly I've never even seen one, I think they become somewhat rare quite a long time ago.
