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:
Oct. 21, 2008
Filed:
Mar. 08, 2006
Shih-wei Huang, Taoyuan Hsien, TW;
Lee-long Chen, Taoyuan Hsien, TW;
Shih-ming Huang, Taoyuan Hsien, TW;
Wen-shi Huang, Taoyuan Hsien, TW;
Shih-Wei Huang, Taoyuan Hsien, TW;
Lee-Long Chen, Taoyuan Hsien, TW;
Shih-Ming Huang, Taoyuan Hsien, TW;
Wen-Shi Huang, Taoyuan Hsien, TW;
Delta Electronics Inc., Taoyuan Hsien, TW;
Abstract
A brushless DC motor and a stator thereof. The stator comprises an upper magnetic pole piece and a lower magnetic pole piece. The upper magnetic pole piece comprises a plurality of upper protruding portions extending toward the lower magnetic pole piece, and the lower magnetic pole piece comprises a plurality of lower protruding portions extending toward the upper magnetic pole piece. The upper protruding portions and the lower protruding portions are substantially spaced apart and alternately arranged. A positioning portion extending from a distal end of each upper protruding portion is located below the magnetic ring of the rotor, to increase the magnetic force therebetween. Alternatively, a positioning portion can be formed between the lower protruding portions of the lower magnetic pole piece and extended to the bottom of the rotor; thus, an axial attraction force can be generated to stabilize the rotor.