Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Electrical energy storage device – inductor – transformer,...
Patent
1991-02-28
1994-04-26
Picard, Leo P.
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Electrical energy storage device , inductor, transformer,...
29599, 335216, 335284, H01F 722
Patent
active
053067010
ABSTRACT:
A method of trapping a field in a block of superconductor material, includes providing (i) a block of material defining a bore, (ii) a high permeability core within the bore that defines a low reluctance path through the bore, (iii) a high permeability external structure on the exterior of the block of material that defines a low reluctance path between opposite ends of the core, and (iv) an electromagnet configured to apply a magnetic field around the high permeability core. The method proceeds by energizing the electromagnet to produce an applied magnetic field around the high permeability core, cooling the block of material sufficiently to render the block of material superconducting, de-energizing the electromagnet to result in a trapped magnetic field, and at least partially removing the low reluctance path defined by the core and the external structure in order to increase the magnetic flux density of the trapped magnetic field.
REFERENCES:
patent: 4190817 (1980-02-01), Rabinowitz
patent: 4722134 (1988-02-01), Wilson
patent: 4904971 (1990-02-01), Jin
patent: 5041419 (1991-08-01), Leupold
patent: 5113163 (1992-05-01), Leupold
Israelsson Ulf E.
Strayer Donald M.
Barrera Raymond
California Institute of Technology
Hanson Loyal M.
Picard Leo P.
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