Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1988-02-08
1990-02-27
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
335222, 505 1, H01F 722, H01B 1200
Patent
active
049049712
ABSTRACT:
A superconducting electromagnet comprising an outer core having an aperture; an inner core having a periphery characterized for complementary insertion into the outer core aperture leaving a uniform gap therebetween and a frame means for coupling the outer and inner cores into a fixed position relation. A magnetizing means, such as a coil on the inner core develops an initial flux field. The flux field passes through the inner core, the first gap, the outer core, across the second gap to the inner core in response to excitation of the magnetizing means. The outer and inner cores are coated on all surfaces except opposing inner and outer core gap surfaces with superconductive material. The superconductive material is applied to the outer and inner cores at regions selected to pass induced magnetizing current. The induced magnetizing current circulating via closed current paths within the superconductive material to support the flux free of energy loss on termination of excitation of the magnetizing means. A force coil is shaped for insertion in and free movement within the gap between the inner and outer coils. The force coil is coupled to apply a force to a workpiece in response to application of a control current to the force coil in the presence of the flux field in the first and second gaps.
REFERENCES:
patent: 3233155 (1966-02-01), Atherton
patent: 3467925 (1969-09-01), Masuda
patent: 3629753 (1971-12-01), Kawabe et al.
patent: 4048602 (1977-09-01), Diamantides
Hamann H. Frederick
Harris George
Kirk James F.
Montanye George A.
Rockwell International Corporation
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