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. 24, 2024
Filed:
Nov. 18, 2020
Samsung Electronics Co., Ltd., Suwon-si, KR;
Jinwoo Cho, Suwon-si, KR;
Wonsoo Kang, Suwon-si, KR;
Jimin Kim, Suwon-si, KR;
Keeyeon Cho, Suwon-si, KR;
Jinwoo Han, Suwon-si, KR;
Woong Hwang, Suwon-si, KR;
SAMSUNG ELECTRONICS CO., LTD., Suwon-si, KR;
Abstract
A brushless direct current (BLDC) motor includes a rotor having a cylindrical permanent magnet to which a shaft is centrally coupled, and supported to rotate on the shaft. An annular stator surrounds the rotor and includes a plurality of teeth and a wound coil to generate an electromagnetic field. The permanent magnet includes a stress reducing portion, which is provided at opposite end portions thereof, and which has a shape having a mass or a volume which is smaller than a mass or a volume per unit length in an axial direction of a portion of the permanent magnet other than the opposite end portions, to reduce centrifugal stress caused by spinning of the rotor.