Switched reluctance motor

摘要

The clearance between the stator pole portions and the rotor pole portions at the axial central portion is larger than the clearance therebetween at the axial end portions. According to these characteristics, the magnetic attracting force causing objectionable acoustic noise is increased at the axial end portions of the housing and the stator in which stiffness against the magnetic attracting force is high and decreased at the axial central portion in which their stiffness against the magnetic attracting force is low. Thereby, the objectionable acoustic noise is reduced without changing the motoring torque and increasing the weight of the switched reluctance motor.