The effect of high current density and uneven current distribution on a current collection system

Author

Chow, Tommy W S ; Bishop, Herby W.

Author_Institution

Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong

Volume

14

Issue

3

fYear

1991

fDate

9/1/1991 12:00:00 AM

Firstpage

650

Lastpage

656

Abstract

The complex relationship between current density, flash temperature, contact voltage drop, brush wear, and brush hardness is discussed. The flash temperature is estimated for a wide range of current densities and the effect of brush softening at high temperature is included in the analysis. Experimental results obtained from two screening rigs provided strong evidence that a nonlinear current distribution occurred on a current collection system. How the flash temperature and the current collector performance are affected by the effect of such a nonhomogeneous current distribution are discussed

Keywords

brushes; wear; brush hardness; brush softening at high temperature; brush wear; complex relationship; contact voltage drop; current collection system; effect; effect of high current density; flash temperature; nonhomogeneous current distribution; nonlinear current distribution; uneven current distribution; Brushes; Contacts; Copper alloys; Current density; Current distribution; Degradation; Electric resistance; Equations; Superconducting films; Temperature distribution;

fLanguage

English

Journal_Title

Components, Hybrids, and Manufacturing Technology, IEEE Transactions on

Publisher

ieee

ISSN

0148-6411

Type

jour

DOI

10.1109/33.83958

Filename

83958