Invention Grant
- Patent Title: Complementary permanent magnet structure capable of minimizing cogging torque for rotating electric machine
- Patent Title (中): 互补永磁体结构,能够最小化旋转电机的齿槽转矩
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Application No.: US12400355Application Date: 2009-03-09
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Publication No.: US07999430B2Publication Date: 2011-08-16
- Inventor: Shih-Wei Hung
- Applicant: Shih-Wei Hung
- Applicant Address: TW Hsin-Chu
- Assignee: Industrial Technology Research Institute
- Current Assignee: Industrial Technology Research Institute
- Current Assignee Address: TW Hsin-Chu
- Agency: WPAT, PC
- Agent Justin King
- Priority: TW97149678A 20081219
- Main IPC: H02K21/12
- IPC: H02K21/12

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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