Patent ID: 6528923
Filing Date: 2003-03-04
Classification: H01R,H02K

Abstract:
A rotary electric machine, comprising:an armature including a commutator composed of a plurality of conductive segments; and a stacked brush provided by layering a low-resistance brush layer and a high-resistance brush layer each having different specific resistance, the low-resistance brush layer being disposed at a front end side in a rotational direction of the commutator, the high-resistance brush layer being disposed at a rear end side in the rotational direction, the brush being slidable over the commutator, wherein the commutator has an insulation gap provided between neighboring segments of the commutator, and a width â€œaâ€  of the insulation gap and a width â€œbâ€  of the high-resistance brush layer in a stack direction are determined to satisfy a