Electrical generator or motor structure – Dynamoelectric – Linear
Patent
1980-03-24
1985-07-09
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Linear
310 13, 104290, H02K 4102
Patent
active
045284660
ABSTRACT:
An internal flux-conducting member is axially elongated and is manufactured with at least one radially extending electrical discontinuity, to prevent circumferential eddy currents from flowing therewithin in paths which are circular as viewed along its axis. The member may be a single unitary element into which elongated slots are cut, or may be assembled of a plurality of like rods which, when assembled together, have abutting surfaces which form the electrical discontinuities. The rods may be joined together by a nonconductive metal-bonding agent.
An external flux-conducting member is disclosed in which at least two like curved frame elements which are made of ferromagnetic material are connected together so as to form a hollow, open-ended frame with an axially elongated and generally cylindrical shape. The frame thus formed contains a plurality of annular magnet rings which are all radially magnetized, with adjacent magnet rings being magnetized in opposite direction. The magnet rings may be formed as individual units or as assemblies of arcuate half-shells. The magnet rings may be bonded to the frame in which they are held fixed.
REFERENCES:
patent: 1136942 (1914-04-01), Cutten
patent: 4220899 (1980-09-01), von der Heide
Papst Georg
von der Heide Johann
Duggan Donovan F.
Papst Motoren KG
Striker Michael J.
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