Electrical generator or motor structure – Dynamoelectric – Reciprocating
Patent
1981-03-11
1984-01-24
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Reciprocating
417416, H02K 3318
Patent
active
044279060
ABSTRACT:
A vibrating compressor having ferrite magnets formed into arc-shaped pieces the center angle of which includes 360.degree. and disposed along the internal circumference of a cup-shaped external iron core, a cylindrical magnetic pole facing with the ferrite magnets at a predetermined gap, and an electromagnetic coil vibratably supported by a mechanical vibration system in an annular magnetic gap defined by the ferrite magnets and the cylindrical magnetic pole, wherein magnetic flux density in the annular magnetic gap is maintained uniform by at least making the axial length of the ferrite magnets larger than the length of the cylindrical magnetic pole, and the relative position of the ferrite magnets and the electromagnetic coil is selected so as to ensure the precise switching of drive current flowing through the electromagnetic coil.
REFERENCES:
patent: 2764702 (1956-09-01), Mason
patent: 4121125 (1978-10-01), Dolz
Kainuma Hiroyuki
Kimura Tadayoshi
Ault Anita
Duggan Donovan F.
Sawafuji Electric Co. Ltd.
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