Torque motor with magnet armature

Details Torque motor with magnet armature Torque motor with magnet armature

1988-06-17

1990-05-01

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335230, 335279, H01F 708

Patent

active

049222171

ABSTRACT:
A torque motor including a frame of soft magnetic material, such as soft iron, spaced first end portions on the frame, an armature which is a magnet, spaced second end portions on the armature, a mounting member for mounting the armature on the frame for allowing motion of the armature relative to the frame, each of the end portions of the armature including a north pole and a south pole, air gaps between the end portions of the frame and the end portions of the armature, a coil mounted on the frame, and the armature being in the form of a laminate with a central layer being a rare earth magnet between outer layers of magnetic material.

REFERENCES:
patent: 2915681 (1959-12-01), Troy
patent: 3175585 (1965-03-01), Faisandier
patent: 3330301 (1967-07-01), Ludwig
patent: 3399861 (1968-09-01), Howland
patent: 3531745 (1970-09-01), Tibbetts
patent: 3803522 (1974-04-01), Rooney
patent: 4142166 (1979-02-01), Arnoux
patent: 4325043 (1982-04-01), Kimpel
patent: 4354662 (1982-10-01), Thompson
patent: 4428559 (1984-01-01), Ichiryu et al.
patent: 4464978 (1984-08-01), Ichiryu et al.
patent: 4628809 (1986-12-01), Das et al.
patent: 4631430 (1986-12-01), Aubrecht
patent: 4641072 (1987-02-01), Cummins
patent: 4804934 (1989-02-01), Finke et al.

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