Small brush motor
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United States of America Patent
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-
Nov 23, 2004
Grant Date -
Oct 30, 2003
app pub date -
Feb 26, 2003
filing date -
Apr 30, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A small brush motor which uses a three-electrode varistor and which suppresses disconnection or short-circuits of crossover wires of coils. Each phase coil of the three-phase coil of an armature uses three risers and two salient poles, each phase coil having a zigzag part formed by alternately bending and connecting successively to the front side, back side, and back side the three salient poles in the interval from the knotting part of the first riser in the forward rotation direction to the knotting part of the second riser, a first coil part formed by winding from the knotting part of the second riser in the reverse rotation direction and wrapping at the adjoining first salient pole, and a second coil part formed by winding from the first coil part in the forward rotation direction and wrapping at the adjoining second salient pole and connects to a knotting part of the adjoining opposite phase first riser extending from the second coil part in the forward rotation direction, the winding directions of the first and second coil parts being opposite each other.
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