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Relationship between Contact Voltage Drop and Frictional Coefficient under High‐current Sliding Contact
Author(s) -
Ueno Takahiro,
Kadono Kenichi,
Yamaguchi Shinji,
Aoyagi Minoru,
Tanaka Akio,
Morita Noboru
Publication year - 2010
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.20562
Subject(s) - brush , current (fluid) , commutator , voltage drop , electrical contacts , materials science , overcurrent , drop (telecommunication) , dc motor , electrical engineering , mechanical engineering , voltage , mechanics , composite material , engineering , physics , lie conformal algebra , quantum mechanics , lie algebra
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.