Cores for electromagnetic apparatus and methods of fabrication

Details Cores for electromagnetic apparatus and methods of fabrication Cores for electromagnetic apparatus and methods of fabrication

1981-06-08

1985-05-28

Ramsey, Kenneth J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

29608, 29609, 148 3155, 148403, 228107, 228190, 264 84, 264DIG58, 428940, H01F 4102, B23K 2008

Patent

active

045200785

ABSTRACT:
A number of metal cores especially suitable for use in an electrical induction device such as a transformer are disclosed herein along with respective methods of making these cores. In accordance with each of these methods, the appropriate metal material is initially provided and thereafter formed into an unsolidified, preliminary shape. Thereafter, while the material is in its preliminary shape, it is densified, preferably by means of explosion bonding, whereby to improve its permeability and saturation field characteristics. In one embodiment, a metal material is initially provided as a continuous strip. In another embodiment, the metal material is initially provided as a number of plates and still in another, preferred embodiment, amorphous metal particulate material is utilized. In this latter embodiment, the orientation of the particulate material is controlled to further improve the permeability and saturation field characteristics of the ultimately formed core.

REFERENCES:
patent: 2384215 (1945-09-01), Toulmin, Jr.
patent: 3220103 (1965-11-01), Simons
patent: 3432279 (1969-03-01), Mendelson et al.
patent: 4201837 (1980-05-01), Lupinski
patent: 4325895 (1982-04-01), Morris
patent: 4364020 (1982-12-01), Lin et al.
patent: 4385944 (1983-05-01), Hasegawa
Journal of Materials Science, vol. 14, (1979), pp. 2523-2526.
Cline et al., Scripta Metall., 1977, 11, pp. 1137-1138.
Morris, Metal Science, Jun. 1980, pp. 215-220.

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