Stator structure using forming curved wafer thin magnets from ra

Details Stator structure using forming curved wafer thin magnets from ra Stator structure using forming curved wafer thin magnets from ra

1978-05-05

1979-04-24

Budd, Mark O.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 310254, H02K 2126

Patent

active

041514351

ABSTRACT:
In a preferred embodiment thin curved rare earth-cobalt magnets supported on the interior surface of a steel casing are formed by hot isostatic compaction. Rare earth-cobalt powder is magnetically aligned and compacted to at least 65% of the theoretical density. The relatively strong, curved green compacts are positioned on a curved mandrel and placed in a closely fitting steel casing which is evacuated and sealed. The magnets are densified under isostatic gas pressure at elevated temperatures and bonded to the steel. The steel backing serves as an integral motor casing when such magnets are used in D.C. motors.

REFERENCES:
patent: 3510707 (1970-05-01), Stone et al.
patent: 3939371 (1976-02-01), Murakami
patent: 3988623 (1976-10-01), Yamaguchi et al.
patent: 4076561 (1978-02-01), Lee et al.
patent: 4091300 (1978-05-01), Lynch et al.

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