| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wiper motor that allows switching between rotational speeds even when the motor is configured to have multiple poles. <P>SOLUTION: Four magnets 22 are mounted on an inner surface of a motor yoke of a wiper motor 18. Sixteen slots 27a to 27p are formed on an armature core 27. Lap windings 28 are wound on the slots 27a to 27p. A commutator 31 having sixteen commutator pieces 31a to 31p is fixed to an armature shaft. The windings 28 are connected to the commutator pieces 31a to 31p, and pairs out of the commutator pieces 31a to 31p to be at the same potential are electrically connected to each other by respective connecting wires 41a to 41h. A common brush 32 and a low-speed operation brush 33 that each contact the commutator 31 slidably are provided so as to be displaced from each other in a rotating direction. A high-speed operation brush 36 that contacts the commutator 31 slidably is provided on a side of a larger angle between the low-speed operation brush 33 and the common brush 32. <P>COPYRIGHT: (C)2013,JPO&INPIT |
