Title:
BRUSH MOTOR
Document Type and Number:
Japanese Patent JP2017005831
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a brush motor that is able to reduce pulsation of current flowing in a brush.SOLUTION: A brush motor 100 comprises: a plurality of permanent magnets 4 disposed on the inner peripheral surface 8 of a stator core 7 along a circumferential direction such that magnetic poles adjacent to each other are different; a rotor core 5 accommodated radially inside the plurality of permanent magnets 4 and having a plurality of teeth 1 formed along a circumferential direction; a plurality of coils 9 formed by winding linear materials around the plurality of teeth 1; a plurality of segments 2 to which a pair of end parts of the beginning and end of the linear material of each of the plurality of coils 9 are connected and which are annularly disposed; and at least two pairs of brushes 3 electrically conducts to the coils 9 by their contact with the segments 2. The opening angle θ of the brush 3 along a circumferential direction is set such that the ratio of the smallest number to the largest number of coils 9 conducted when the brushes 3 come into contact with the segments 2 has a relation of 1≤the largest number/the smallest number≤1.2.SELECTED DRAWING: Figure 1
Inventors:
KAWANISHI YUSAKU
SUZUKI KATSUMI
ABIKO ATSUSHI
TAKAGI HIROYUKI
SUZUKI KATSUMI
ABIKO ATSUSHI
TAKAGI HIROYUKI
Application Number:
JP2015115891A
Publication Date:
January 05, 2017
Filing Date:
June 08, 2015
Export Citation:
Assignee:
AISIN SEIKI
International Classes:
H02K23/00; H02K13/00; H02K23/26
Attorney, Agent or Firm:
Patent business corporation r&c