Title:
Brushed motor
Document Type and Number:
Japanese Patent JP6301708
Kind Code:
B2
Abstract:
A brushed motor includes a rotation shaft, a commutator including a plurality of segments separated by a plurality of undercuts arranged at unequal intervals, an armature, a plurality of permanent magnets, a voltage equalizing line, a positive electrode brush, and a negative electrode brush. When Pz is the number of the permanent magnets and N is the number of the segments, a relationship of N=Pz(K−0.5) is satisfied. Pz is an even number that is greater than or equal to four. K is a constant and is a natural number that is greater than or equal to two. The plurality of undercuts includes at least one set of undercuts arranged at an undercut interval that differs from a reference angle θz. The reference angle θz is specified by a relational expression of θz=(360 degrees/Pz)±(360 degrees/2N).
Inventors:
Tetsuaki Ichikawa
Toshio Yamamoto
Kuwano Masayuki
Toshio Yamamoto
Kuwano Masayuki
Application Number:
JP2014078884A
Publication Date:
March 28, 2018
Filing Date:
April 07, 2014
Export Citation:
Assignee:
ASMO Co., Ltd.
International Classes:
H02K23/00; H01R39/04; H02K13/00; H02K13/04
Domestic Patent References:
| JP3994010B2 | ||||
| JP2009112177A | ||||
| JP2012196043A |
Foreign References:
| US4792714 |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda