Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2011-08-16
2011-08-16
Leung, Quyen (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S156450
Reexamination Certificate
active
07999430
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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State Intellectual Property Office of the People's Republic of China, “Office Action”, Mar. 24, 2011, China.
Industrial Technology Research Institute
King Justin
Leung Quyen
Mok Alex W
WPAT, PC
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