Damping of noise

Details Damping of noise Damping of noise

1976-11-17

1978-03-14

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68R, 310156, 310 15, H02K 524

Patent

active

040792749

ABSTRACT:
A slug is disposed adjacent a rotor of an induction type motor. The slug is of a "ferrous" material such that the attraction between it and the magnetic poles of the rotor creates at least side and preferably both side and end loading of opposed ends of the rotor shaft within its supporting bearings. The slug, disposed stationarily in spaced relation to the rotor, is of a length approximately equal to the length of a chord through adjacent magnetic poles. The action of the slug is to reduce bearing rattle in a rotating member.

REFERENCES:
patent: 3803433 (1974-04-01), Ingenito
patent: 3840761 (1974-10-01), Muller
patent: 3869627 (1975-03-01), Ingenito et al.
patent: 3891905 (1975-06-01), Muller
patent: 3894252 (1975-07-01), Miwa et al.
patent: 4011475 (1977-03-01), Schmider

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