Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1993-01-22
1995-06-27
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
H01F 702
Patent
active
054283337
ABSTRACT:
A magnetic structure is provided having a pair of spaced apart magnetized elements having surfaces in a common plane that defines a wall of a cavity. The space between the first and second magnetized elements is formed with at least one slit extending perpendicularly to the common plane. In order to compensate for field distortion in the cavity, a magnetized element is provided in at least one of the slits, the material in the slit having a remanence that is different from the remanences of the spaced apart magnetized elements that define the structure. In modifications of the invention, the field distortion is compensated by including at least one component in the cavity that has a high magnetic permeability. This component, has a variable thickness. It may be formed of a single component, or of a plurality of plates. In a still further embodiment, for a yokeless magnetic structure, field distortion compensation is effected by positioning magnetized elements outside of the magnetic structure. In a method for compensating for field distortion in a magnetic structure that defines a cavity, the magnetic field on a surface is measured to produce a map of the field on the surface. A plurality of points on the surface are projected to corresponding points on a second surface. A dipole is applied at each such point on the second surface that cancels perturbations of the magnetic field of the magnetic structure at the respective first point.
REFERENCES:
patent: 4580098 (1986-04-01), Gluckstern et al.
patent: 4692732 (1987-09-01), Leupold et al.
patent: 4703276 (1987-10-01), Beer
patent: 4999600 (1991-03-01), Aubert
patent: 5014032 (1991-05-01), Aubert
patent: 5028903 (1991-07-01), Aubert
patent: 5055812 (1991-10-01), Abele et al.
patent: 5148138 (1992-09-01), Miyata
IEEE Transactions on Magnetics, vol. 28, No. 1, 1 Jan. 1992, New York U.S., pp. 931-934, M. G. Abele et al., `Field Computation in Permanent Magnets`.
IEEE Transactions on Magnetics, vol. 26, No. 5, 1 Sep. 1990, New York U.S., pp. 1665-1667, M. G. Abele, `Three-Dimensional Yokeless Magnets`.
Abele Manlio G.
Rusinek Henry
Barrera Raymond M.
New York University
Picard Leo P.
LandOfFree
Method and apparatus for compensation of field distortion in a m does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for compensation of field distortion in a m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for compensation of field distortion in a m will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-289980