Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1974-12-20
1977-03-15
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 70R, 310156, 310 67R, H02K 2122
Patent
active
040126510
ABSTRACT:
A permanent magnet field means for use in a dynamoelectric machine comprises a magnet ring received in a supporting ring of ferromagnetic material. The magnet ring includes a circular array of arcuate magnets and a carrier of non-magnetic material in which the magnets are fixedly embedded. The magnet ring has a single axially extending gap located between the adjacent ends of two neighboring magnets. A spreading element placed in the gap spreads the magnet ring into tight engagement with the supporting ring. In some cases, this expansion of the magnet ring is used by itself to hold the magnet ring to the supporting ring in the finished device. In other cases, an adhesive is used between the supporting ring and the magnet ring and the expansion of the magnet ring is used to hold the magnet ring tightly to the supporting ring until the adhesive sets, the adhesive thereafter being the principal agent fixing the magnet ring to the supporting ring.
REFERENCES:
patent: 3368275 (1968-02-01), Eberline et al.
patent: 3500090 (1970-03-01), Baermann
patent: 3663850 (1972-05-01), Phelon
patent: 3828212 (1974-08-01), Harkness et al.
Duggan Donovan F.
R. E. Phelon Company, Inc.
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