PERMANENT-MAGNET SYNCHRONOUS MOTOR.

摘要

The thickness of a magnet (12) is gradually decreased from a central position toward both ends or the outer circumference circumference of a rotor core (10) is formed by a number of arcs (18) and magnets (12) having a predetermined thickness are stuck and fastened to it, such that the gap size gradually increases from the central position of the : magnet towards both ends. This helps decrease the starting torque that results from a change in a relationship of relative positions between the stator slot and the magnet when the rotor is rotated. @(13pp Dwg.No.1/4)@.