MUTUALLY INTERPOLATING PERMANENT MAGNET FOR MINIMIZING COGGING TORQUE IN ROTARY ELECTRIC MACHINE

摘要

PROBLEM TO BE SOLVED: To provide mutually interpolating permanent magnets for minimizing a cogging torque in a rotary electric machine.;SOLUTION: The mutually interpolating permanent magnets for minimizing a cogging torque in a rotary electric machine have a magnetic pole core B2 and an armature core B1. The magnetic pole core B2 is cylindrical, and on its circular periphery, an even number of circular-arc magnetic pole sets B3' are continuously provided evenly. Each magnetic pole set B3' comprises a first permanent magnet unit B31 and a second permanent magnet unit B32. The armature core B1 is in a ring form and has a plurality of slots S, wherein a ratio of slots of the armature core B1 to magnetic poles of the magnetic core B2 is 3/2. The first and second permanent magnet units B31, B32 are also disposed symmetrically to generate two sets of cogging torques which are complemented mutually at an electric angle.;COPYRIGHT: (C)2010,JPO&INPIT