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:
Sep. 02, 2008
Filed:
Sep. 20, 2005
Sang Hoon Park, Suwon-Si, KR;
Hyung Chul Lee, Gunpo-Si, KR;
Sang Yong an, Suwon-Si, KR;
Chun MO Sung, Hwasung-Si, KR;
Yun Seok Kim, Suwon-Si, KR;
Bum Young Byun, Suwon-Si, KR;
Sang Hoon Park, Suwon-Si, KR;
Hyung Chul Lee, Gunpo-Si, KR;
Sang Yong An, Suwon-Si, KR;
Chun Mo Sung, Hwasung-Si, KR;
Yun Seok Kim, Suwon-Si, KR;
Bum Young Byun, Suwon-Si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A brushless DC motor prevents disconnection of a magnetic flux and to minimize leakage of the magnetic flux, thereby reducing torque ripple. A plurality of magnetic flux-disconnection preventing holes are arranged in an outer periphery of a rotor core between installing holes into which magnets are fitted. The plurality of magnetic flux-disconnection preventing holes are symmetrical at both sides about a first line connecting a center of the rotor core to a center between the adjacent installing holes, and an angle between the first line and a second line connecting the center of the rotor core to an outermost end of the plurality of magnetic flux-disconnection preventing holes is about 15˜20°. A length between an outer periphery of the rotor core and an outer periphery of the plurality of magnetic flux-disconnection preventing holes is smaller than a gap between the rotor core and the stator.