Solid brush current collection system

Details Solid brush current collection system Solid brush current collection system

1978-07-26

1980-12-23

Dixon, Jr., William R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310227, 310248, 428408, H02K 928, H01R 3900

Patent

active

042412714

ABSTRACT:
A solid brush current collecting system for dynamo-electric machines which selectively uses compatible materials in different applications for the moving and stationary contact members. Brushes of different compositions are disclosed and the current transfer and collecting members are operated in an inert gas atmosphere, such as carbon dioxide, having either water or organic additives, such as alcohols, hydrocarbons, ketones, and the like, to achieve operation of the current collector system at higher temperatures, higher velocities and higher current densities than is possible with conventional systems. Low friction and low wear rates are in part achieved by operating the contact members in a low temperature environment.

REFERENCES:
patent: 1492931 (1924-05-01), Nobuhara
patent: 1719407 (1929-07-01), Trudeau
patent: 2560784 (1951-07-01), Sears
patent: 3673447 (1972-06-01), Zumbach et al.
patent: 3826942 (1974-07-01), Twarog, Jr.
Pardee, "Moisture Dependance of Silver-Graphite Brushes in Air, Nitrogen, Helium and Carbon Dioxide", IEEE Transactions on Power Apparatus and Systems, vol. 86, #5, May 1967, pp. 616-625.
Savage et al., "Vapor Lubrication of Graphite Sliding Contacts", Journal of Applied Physics, vol. 27, #2, Feb. 1956, pp. 136-138.

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