| Experimental Study on the Electrical Performance of an Automotive Actuator DC Motor According to Brush Surface States
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| Juyub Lee , Sangmin Yun |
| Reliability Technology R&D Department , Korea Automotive Technology Institute |
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| ABSTRACT |
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This study was aimed to fi gure out the eff ect on electrical characteristics of DC motor according to the brush surface states
related to surface roughness and the other purpose was the eff ect 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. |
| Key Words:
Automotive actuator · Accelerated life test · DC motor brush · Electrical contact · Surface corrosion · Surface roughness
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Corresponding Author.
Juyub Lee , Email. 
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