COMMUTATOR AND BRUSH MATERIALS FOR SMALL ELECTRIC DC MOTOR, CLAD COMPOSITE MATERIAL, AND SMALL ELECTRIC DC MOTOR USING THE SAME

摘要

The present invention is to enable a long life of the spindle motor for the DVD of the type controlled by a pulse current, and an object thereof is to provide a commutator brush material or materials to a small DC motor. ; as a means to solve this problem, the material for the small direct current commutator motor of the present invention is 6.0 to 10.0% by weight and Cu of , 1.0~5.0 ZnO and the wt.%, and the rest consists of the composition of the Ag, the AgCu alloy matrix, Cu metal particles, ZnO characterized in that the particles are dispersed, and the brush material and 0.1 to 5.0% by weight of MgO , is composed of the composition of the rest of the Ag, the Ag matrix, is dispersed particles of MgO, and Ni, or of from 5.0 to 15.0% by weight, and the rest is composed of a composition of Pt, characterized in that the Pt matrix which employs a Ni to. ; Small DC Motors, DVD, DVD player, spindle motor, commutator, brushes, contact resistance, long life