Electrical generator or motor structure – Dynamoelectric – Reciprocating
Patent
1985-12-17
1987-06-23
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Reciprocating
290 1R, 310 30, H02K 3300
Patent
active
046755632
ABSTRACT:
A reciprocating linear motor (10) is formed with a pair of ring-shaped permanent magnets (50, 52) having opposite radial polarizations, held axially apart by a non-magnetic yoke (20), which serves as an axially displaceable armature assembly (14). A pair of annularly wound coils (30, 32) having axial lengths which differ from the axial lengths of the permanent magnets are serially coupled together in mutual opposition and positioned with an outer cylindrical core (24) in axial symmetry about the armature assembly. One embodiment includes a second pair of annularly wound coils (36, 38) serially coupled together in mutual opposition and an inner cylindrical core (26) positioned in axial symmetry inside the armature radially opposite to the first pair of coils. Application of a potential difference across a serial connection of the two pairs of coils creates a current flow perpendicular to the magnetic field created by the armature magnets, thereby causing limited linear displacement of the magnets relative to the coils.
REFERENCES:
patent: 3102205 (1963-08-01), Combs
patent: 3504320 (1970-03-01), Engdahl
patent: 4346318 (1982-08-01), Strikman
patent: 4389849 (1983-06-01), Gasser et al.
patent: 4454426 (1984-06-01), Benson
patent: 4602174 (1986-07-01), Redlich
patent: 4623808 (1986-11-01), Beale et al.
Duggan Donovan F.
Manning John R.
Sheinbein Sol
The United States of America as represented by the Administrator
Tresansky John O.
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