| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a motor with a brush capable of suppressing a noise level of noise which is generated in accordance with a positional relation between undercuts of segments formed at unequal-angle intervals and the brush.SOLUTION: A motor with a brush of four-pole ten segments which cannot distribute an equal number of throttles (teeth) to magnetic poles, is brought into slide-contact with a positive pole brush B1 and a negative pole brush B2 in which first to tenth segments SG1 to SG10 are separated at 90° in a circumferential direction. In the motor with the brush of four-pole ten segments, first to tenth undercuts C1 to C10 forming the first to tenth segments SG1 to SG10 are formed in unequal pitches. The undercuts of unequal pitches are formed at undercut intervalsθx1 andθx2 different from first and second reference undercut intervals specified by a motor with a brush of four-pole ten segments in which the undercuts are in equal pitches.</p> |
