Industrial Technology Research Institute

Liang-Chiao Huang

Yu-Choung Chang

Yang-Guang Liu

Shou-Long Yu

Chia-Hao Hsu

An outer-rotor permanent magnet brushless motor is disclosed, which comprises an outer-rotor and an inner-stator. The outer-rotor configured with P poles, P is a natural number and denotes a multiple of 4. The inner-stator has a stator axle, and S teeth which configured on outer surface of stator, S=P&#x2212;1, S is a natural number. A circle is formed about a center of the stator axle from the center of the outer end surface. A correction angle aand an original angle a are defined from the center of the outer end surface. T The ratio of a/a is defined by the following formula: 0.2&#x3c;(a/a)&#x3c;0.6.

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Puxin, Taiwan

Liang-Chiao Huang