Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2005-12-21
2009-08-25
Leung, Quyen (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S154210, C310S154220, C310S046000, C310S154010, C029S596000
Reexamination Certificate
active
07579745
ABSTRACT:
A rotor is operable to rotate in a rotating direction, and is provided with five teeth that define five slots therebetween at regular intervals in the rotating direction. A pair of arc-shaped magnets surrounds the rotor, and faces each other through the rotor. A value of a circumferential angle between two adjacent slots with respect to an axis of the rotor is defined as a. A value of a circumferential angle between opposite end edges of an inner surface of the magnet in a circumferential direction of the magnet, which faces the rotor, with respect to the axis of the rotor is defined as b. The value of b falls within a range from 23 to 25 when the value of a is assumed as 12.
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(“Finite element analysis on torque fluctuation of PMDC motors induced by cogging and commutation”, Ruifang Liu; Dengjun Yan; Minqiang Hu; Electrical Machines and Systems, 2003. ICEMS 2003. Sixth International Conference on, vol. 2, Nov. 9-11, 2003 pp. 747-750 vol. 2.
Ito Masami
Miyajima Takeo
Takahashi Yuuki
Yamada Kensuke
Kim John K
Leung Quyen
Mitsumi Electric Co. Ltd.
Whitham Curtis Christofferson & Cook, P.C.
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