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. 07, 2020
Filed:
Feb. 02, 2018
Yamaha Hatsudoki Kabushiki Kaisha, Iwata-shi, Shizuoka, JP;
Haruyoshi Hino, Iwata, JP;
YAMAHA HATSUDOKI KABUSHIKI KAISHA, Iwata-Shi, Shizuoka, JP;
Abstract
A brush motor including a rotor having a core with a winding wound thereon and a commutator electrically connected to the winding, a brush configured to contact the commutator to cause a current to be supplied to the rotor, and a movable permanent magnet arranged to oppose the core with a gap therebetween and to be movable in a circumferential direction of the rotor within an angle range. The angle range includes a retarded angle position and an advanced angle position, in which the movable permanent magnet is displaced respectively in a retarded angle direction and an advanced angle direction relative to the brush, to thereby respectively cause a first torque and a second torque higher than the first torque. The movable permanent magnet is movable in the retarded or advanced angle direction within the angle range at least within a period in which a current is supplied to the rotor.