Yokeless permanent magnet solenoids

Details Yokeless permanent magnet solenoids Yokeless permanent magnet solenoids

1994-11-08

1995-08-01

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

H01F 700

Patent

active

054383080

ABSTRACT:
A yokeless magnetic circuit composed of a permanent magnet shell having a lenoidal-cavity within which a working field is generated. The permanent magnet shell has a conical permanent end magnet adjacent each of its ends to insure that the surface at each of its ends is equipotential between the radial periphery of the permanent magnet shell and the axial centerpoint of the solenoidal cavity. The height of the conical end magnets directly depends of the magnetization and thickness of the permanent magnet shell and whether the internal field is uniform, gradient or variable.

REFERENCES:
patent: 4692732 (1987-09-01), Leupold et al.
patent: 4701737 (1987-10-01), Leupold
patent: 5014028 (1991-05-01), Leupold
patent: 5034715 (1991-07-01), Leupold et al.

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