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. 30, 2019
Filed:
Mar. 05, 2015
Mitsuba Corporation, Kiryu-shi, Gumna, JP;
Natsumi Tamura, Kiryu, JP;
Hiroto Tanaka, Kiryu, JP;
Teppei Tokizaki, Kiryu, JP;
Satoshi Tamura, Kiryu, JP;
Mitsuba Corporation, Gunma, JP;
Abstract
In a 4-pole, 6-slot, 18-segment electric motor, one forward winding coil () and two reverse winding coils () are wound on each tooth (). When the forward winding coils are formed of coils corresponding to a U phase, a V phase, and a W phase and the reverse winding coils are formed of coils corresponding to a '−U' phase, a '−V' phase, and a '−W' phase, the coils, which correspond to a U phase, a “−W” phase, a “−W” phase, a V phase, a “−U” phase, a “−U” phase, a W phase, a “−V” phase, and a “−V” phase, are electrically connected in this order between the adjacent segments. When the number of turns of the coils () corresponding to a U phase, a V phase, and a W phase is denoted by T1, the number of turns of the coils (), which correspond to a “−U” phase, a “−V” phase, and a “−W” phase and first come into sliding contact with a brush, is denoted by T2, and the number of turns of the coils (), which correspond to a “−U” phase, a “−V” phase, and a “−W” phase and later come into sliding contact with the brush, is denoted by T3, “T2>T1>T3” is satisfied.