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Relationship between Contact Voltage Drop and Frictional Coefficient under High-current Sliding Contact

Authors

  • Takahiro Ueno,

    Member, Corresponding author
    1. Department of Electrical and Electronics Engineering, Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro, Minami-Saitama, Saitama 345-8501, Japan
    • Department of Electrical and Electronics Engineering, Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro, Minami-Saitama, Saitama 345-8501, Japan
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  • Kenichi Kadono,

    Non-member
    1. Molex Japan Corporation, 1-5-4 Fukami Higashi, Yamato, Kanagawa 242-0012, Japan
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  • Shinji Yamaguchi,

    Non-member
    1. Fukushima Prefecture Fukushima Airport Office, 21 Habakita, Kitasugama, Tamakawa, Ishikawa, Fukushima 963-6304, Japan
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  • Minoru Aoyagi,

    Non-member
    1. Department of Electrical and Electronics Engineering, Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro, Minami-Saitama, Saitama 345-8501, Japan
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  • Akio Tanaka,

    Member
    1. Oyama National College of Technology, 771 Nakakuki, Oyama, Tochigi 323-0806, Japan
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  • Noboru Morita

    Member
    1. Department of Electrical and Electronics Engineering, Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro, Minami-Saitama, Saitama 345-8501, Japan
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Abstract

Large DC motors are used in various industrial applications. These motors repeatedly generate arcs between the brush and commutator, because the load change is intense and the current value is also large. In particular, for the case in which the current is concentrated on a part of the brush, brush burnout may occur as a result of overcurrent. Therefore, excellent brushes to withstand arc generation and with good electrical properties are required. In the present paper, we discuss the relation between contact voltage drop and frictional wear for electrical sliding contacts when high currents flow to the brush. Specifically, we investigate the means by which to prevent brush burnout when high-current flows to the brush. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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