SOLUTION

• A reluctance motor is a synchronous motor with a salient rotor structure, but no field windings or permanent magnet excitation at all.
• The air-gap flux is provided entirely from the stator side a.c. armature windings which results in a low lagging power factor, typically 0.65 to 0.75 at full-load. Reluctance torque is developed as the salient-rotor poles align themselves with the synchronously rotating stator magnetic field.
• Like wound-field and permanent magnet machines, the synchronous reluctance motor has no synchronous starting torque and runs up from standstill by induction motor action in an auxiliary starting winding.