Title :
New explanation of the polarity effect in current collection
Author :
Guile, A.E. ; Brown, A.F.C. ; Lishman, J.V.
Author_Institution :
University of Leeds, Department of Electrical & Electronic Engineering, Leeds, UK
Abstract :
The phenomenon of unequal contact voltages at the positive and negative brushes of a sliding current-collection system has previously been explained as being ohmic in nature. Measurements are now presented which suggest that it is due instead to a change in surface potential difference at the metal-gas interface, which occurs even without sliding.
Keywords :
electrical contacts; surface phenomena;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19700321
