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. 26, 1976
Filed:
Dec. 17, 1974
Applicant:
Inventors:
Tadashi Takahashi, Hitachi, JA;
Kazuo Onishi, Hitachi, JA;
Mituru Sato, Hitachi, JA;
Junshiro Inamura, Kodaira, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
318254 ;
Abstract
A miniature brushless motor in which driving coils and magnetically responsive elements such as Hall elements are disposed around a permanent magnet rotor. An output appears from the successive Hall elements detecting the rotating position of the permanent magnet rotor so as to control the current supplied to the driving coils. In the brushless motor, the portion of the permanent magnet rotor opposed to the Hall elements is magnetized through an angle which is selected to be smaller than the angle through which the rotor portion opposed to the driving coils is magnetized.