Invention Grant
US07999430B2 Complementary permanent magnet structure capable of minimizing cogging torque for rotating electric machine 有权
互补永磁体结构,能够最小化旋转电机的齿槽转矩

Complementary permanent magnet structure capable of minimizing cogging torque for rotating electric machine
Abstract:
A complementary permanent magnet structure capable of minimizing the cogging torque for a rotating electric machine, the complementary permanent magnet structure comprising: a magnetic pole core being cylinder shaped with even numbered arc-shaped magnetic sets positioned with equal distances on the circumference thereof, each magnetic set being composed of a first permanent magnet unit and a second permanent magnet unit; and an armature core being ring shaped with a plurality of slots; wherein the ratio of the number of the slots to the number of magnetic poles of the magnetic pole core is 3/2; wherein the first permanent magnet unit and the second permanent magnet unit are positioned correspondingly to generate two complementary cogging torques with 180 degrees of electrical angle difference.
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