Electrical machine commutator arrangement having shaped conducti

Details Electrical machine commutator arrangement having shaped conducti Electrical machine commutator arrangement having shaped conducti

1977-05-31

1979-09-11

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310220, 310247, H02K 1304

Patent

active

041676858

ABSTRACT:
Commutator segment shapes are derived, in relation to machine parameters, for which the current density over the trailing edge of the brush is maintained constant, to prevent sparking. The preferred shape is such that the area of contact between the segment and a linear brush increases initially in a single step to half the total area and subsequently increases progressively more slowly; in an alternative shape, the subsequent rate of increase is linear. Suitable brushes to maintain uniform contact in crossing segment boundaries are preferably of the carbon-fibre type.

REFERENCES:
patent: 1292110 (1919-01-01), Simpson
patent: 2297464 (1942-09-01), Fleischman
patent: 3514654 (1970-05-01), Moresi
patent: 3521101 (1970-07-01), Arora
patent: 3590300 (1971-06-01), Moberly
patent: 4019076 (1977-04-01), Bates

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