Metal working – Method of mechanical manufacture – Electrical device making
Patent
1984-07-17
1986-04-08
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
294011, 2940204, 29826, 310 42, 310239, 310248, H01R 4314
Patent
active
045803331
ABSTRACT:
A process and apparatus for preventing film stripping and grooving of a dynamoelectric machine commutator. The process is usable in either repairing or initially manufacturing a high-powered, high-speed dynamoelectric machine. In the process, extra-wide brushes and associated brush holders are mounted in place of conventional standard size brushes and brush holders in order to restrict variations in current unbalance between a plurality of electrically paralleled brushes to a range of 10 to 15% of rated full load brush current density in the brushes at rated load. A machine constructed according to the invention is made with a plurality of extra-wide brushes and brush holders, with no more than four brushes electrically connected in parallel on respective brush holder studs positioned in operating relationship around the commutator thereby to so restrict the permitted range of current density unbalance between brushes.
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General Electric Company
Hall Carl E.
Renner Arnold E.
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