An influence of commutation arc in gasoline on brush wear and commutator

Citation
M. Takaoka et K. Sawa, An influence of commutation arc in gasoline on brush wear and commutator, IEEE T COMP, 24(3), 2001, pp. 349-352
Citations number
11
Categorie Soggetti
Material Science & Engineering
Journal title
IEEE TRANSACTIONS ON COMPONENTS AND PACKAGING TECHNOLOGIES
ISSN journal
15213331 → ACNP
Volume
24
Issue
3
Year of publication
2001
Pages
349 - 352
Database
ISI
SICI code
1521-3331(200109)24:3<349:AIOCAI>2.0.ZU;2-O
Abstract
Many dc motors are used for automotive electrical equipment. Particularly, a motor for a fuel pump has a distinctive feature that its commutation is c arried out in gasoline. Our previous study reported that brush wear in gaso line was much more than that in air. And also carbon brushes were sometimes severely worn in negative polar. In this paper, the wear of carbon brushes for negative polar, sliding again st the copper commutator in gasoline and air is reported. In order to find the cause of severe wear on the carbon brush, we examined the range of brus h wear, arc energy and the influence of arc on the commutator with changing commutation current 5 A to 10 A. As a result, arc energy in air is larger than that in gasoline, but the ran ge of brush wear is narrow. Commutator surface in gasoline is rougher than that in air. And excessive film is observed on the commutator surface when severe wear takes place.