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

  • Electric, Fuel Cell, and Hybrid Vehicle, Electrical and Electronics
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Abstract

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.

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Data availability

The datasets used and/or analysed during the current study available from the corresponding author on reasonable request.

Abbreviations

a :

Brush insertion distance, mm

ω :

Rotating angle of a bolt, degree

d :

Effective diameter, mm

l :

Lead dimension of a bolt, mm

R o :

Contact resistance of the DC mortor, Ω

I :

Current measured through shunt resistance, A

V in :

Applied voltage by the power supply, V

V measured :

Measured voltage between c and d of Figure 4, V

V d :

Voltage drop, V

AF :

Acceleration factor

RH n :

General humidity condition, %RH

RH a :

Accelerated humidity condition, %RH

E a :

Average conservative activation energy, eV

k :

Boltsmann’s constant, eV/K

T n :

General temperature condition, °C

T a :

Accelerated temperature condition, °C

t test :

Test duration of HAST, hour

CL :

Confidence level, %

R T :

Test reliability, %

N :

Sample size

β :

Shape parameter of the Weibull distribution

t use :

Total time exposed to the user environment, hour

R a :

Roughness expressed with an arithmetic mean height, μm

l e :

Evaluation length, mm

x :

Horizontal component of a surface to be measured, mm

z(x) :

Height of the assessed scale-limited profile, μm

j :

Current density, A/mm2

N br :

Number of brushes

S :

Area of brush surface (width × height), mm2

A and k :

Model parameters obtained through the nonlinear regression

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Acknowledgements

This work supported by Korean Institute for Advancement of Technology (KIAT) grant funded by Ministry of Trade, Industry and Energy (Material-component fusion alliance (machine/automobile field)), Korea.

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  1. Reliability Technology R&D Department, Korea Automotive Technology Institute, Cheonan, 31214, Korea

    Juyub Lee & Sangmin Yun

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  1. Juyub Lee
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  2. Sangmin Yun
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Lee, J., Yun, S. Experimental Study on the Electrical Performance of an Automotive Actuator DC Motor According to Brush Surface States. Int.J Automot. Technol. 25, 13–21 (2024). https://doi.org/10.1007/s12239-024-00002-0

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