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1. (WO2017022426) BRUSH MOTOR

Pub. No.:    WO/2017/022426    International Application No.:    PCT/JP2016/070542
Publication Date: Fri Feb 10 00:59:59 CET 2017 International Filing Date: Wed Jul 13 01:59:59 CEST 2016
IPC: H02K 23/04
H02K 23/16
Applicants: YAMAHA HATSUDOKI KABUSHIKI KAISHA
ヤマハ発動機株式会社
Inventors: HINO, Haruyoshi
日野 陽至
Title: BRUSH MOTOR
Abstract:
A brush motor is provided which, without being less compact, can improve characteristics of output torque and rotational velocity with a simple structure. This brush motor is provided with a casing, a rotor, a brush, and a movable permanent magnet which is supported by the casing so as to be capable of moving in the circumferential direction of the rotor independently of the rotor, within an angular range including a retarded position, at which the angular position relative to the brush has been displaced in the retard direction, and an advanced angle position, at which said angular position has been displaced in the advance direction with respect to the retarded angle position and which generates a torque on the rotor greater than the torque at the retarded angle position. The movable permanent magnet is configured so as to be capable of moving in the retard direction and the advance direction within an angular range which includes the retarded angle position and the advanced angle position.