Plural brush DC machine and commutator assembly

Details Plural brush DC machine and commutator assembly Plural brush DC machine and commutator assembly

1974-10-15

1976-02-24

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310136, H02K 1300

Patent

active

039406440

ABSTRACT:
In a direct current machine having plural brushes arranged for sliding engagement over the surface of the commutator assembly along separate paths; wherein the commutator assembly comprises a multiple number of commutator bars with each bar having a current transfer surface divided into conducting and nonconducting sections, each section being located in one of the separate paths, and with the sections of adjacent commutator bars so arranged to provide a checkerboard pattern of conducting and nonconducting sections over the commutator assembly surface. The brushes are interconnected to the machine load through a predetermined circuit network which controls the short circuit current.

REFERENCES:
patent: 439459 (1890-10-01), Zipernowsky et al.
patent: 1461446 (1923-07-01), LeBlanc
patent: 1959462 (1934-05-01), Salda
patent: 3453513 (1969-07-01), Bates et al.
patent: 3662201 (1972-05-01), Madsen

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