SOLUTION

Reluctance Start Motor

The stator of a reluctance start motor is constructed with salient poles. The starting torque is achieved by creating a non-uniform air gap of the salient poles. Each pole is excited by its own winding carrying the same current. The rotor is usually a squirrel cage type. A reluctance motor is basically a single-phase induction motor.

Reluctance Motor

The three-phase as well as single-phase motors can be built with rotors without DC excitation but having non-uniform air-gap reluctance. The stator construction of such motors is similar to 3-phase or 1-phase induction motors but the shape of the squirrel cage rotor of these motors is changed such that it has variable magnetic reluctance along the air gap. The 3-phase induction motors with such rotors are usually called synchronous induction motors. However, the single-phase induction motors built with a variable air-gap reluctance rotor without DC excitation are called reluctance motors. Reluctance Motor and Hysteresis motor are single-phase synchronous motors.

Note:- A reluctance motor is a single-phase induction motor while Reluctance Motor is a single-phase synchronous motors