Experimental Study on the Electrical Performance of an Automotive Actuator DC Motor According to Brush Surface States

This study was aimed to figure out the effect on electrical characteristics of DC motor according to the brush surface states related to surface roughness and the other purpose was the effect of brush surface corrosion, which was formed by the accelerated testing based on Arrhenius-Peck model, on electrical contact. In order to investigate the relationship with the electrical contact according to the brush type, the brush-commutator of the DC motor applied to the actuator of passenger vehicles and the brush-commutator applied to the commercial vehicles actuator were evaluated together, and named with type A and type B, each. The higher surface roughness was, the better the circuit was energized, and type A brushes were more sensitive to the surface roughness. In terms with corrosion, contact resistance tended to be proportional to the test cycle for both types of brushes, and measured values of the contact resistance for type B brushes were higher than type A.