PERMANENT MAGNETIC ELECTROMOTOR

摘要

PURPOSE: A permanent magnetic electric motor is provided to evenly distribute magnetic flux generated by permanent magnets over all area of a magnetizing yoke, thereby removing vibration and noise in a rotor and a stator. CONSTITUTION: A yoke(3a) is mounted to be spaced from permanent magnets(9) forming a rotor. The outer surfaces of the permanent magnets(9) have a predetermined radius of curvature to form a cylinder shape in considering of torque generated in rotation. A plurality of coils(5) are wound on a pair of grooves(3b) formed in the center of the yoke(3a) so that magnetic flux generated by the permanent magnets(9) and coils(5) isn't concentrated in the yoke(3a). In addition, both corners of the yoke(3b) are chamfered to preventing the concentration of the magnetic flux.