SOLUTION

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.
• Reluctance Motor and Hysteresis motor are single-phase synchronous motors.
• 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.