The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 2010
Filed:
Nov. 27, 2007
Alex Horng, Kaohsiung, TW;
Jhin-nan Chen, Kaohsiung, TW;
Chi-min Wang, Kaohsiung, TW;
Hung-chin Mai, Kaohsiung, TW;
Alex Horng, Kaohsiung, TW;
Jhin-Nan Chen, Kaohsiung, TW;
Chi-Min Wang, Kaohsiung, TW;
Hung-Chin Mai, Kaohsiung, TW;
Sunonwealth Electric Machine Industry Co., Ltd., Kaohsiung, TW;
Abstract
The present invention relates to a pole piece structure of stator with radial winding, which employs an optimum ratio α to define the form of the pole piece, increase the overlap region of inductance and torque and lower the cogging torque of a motor, so as to strengthen the self-starting capability of the motor and minimize torque ripple to enhance the overall performance of the motor. The pole piece structure includes a hub having a hole at the center, and a plurality of poles integrally formed on the periphery of the hub, extended to radiate in a radial direction, and having a pole shoe expanded from an end of each pole in a tangential direction, wherein the angle of a single pole shoe is divided by a pitch angle of two adjacent poles to obtain a ratio in a range of 0.86˜0.95.