Electromagneto-mechanical actuator

Details Electromagneto-mechanical actuator Electromagneto-mechanical actuator

1975-11-28

1976-12-14

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

310 37, 310 80, H01F 708

Patent

active

RE0290815

ABSTRACT:
An electromagneto-mechanical actuator comprising a brushless D.C. torque motor capable of producing a torque proportional to the current fed to coil windings which are arranged as a stator, a permanent magnet being the rotor, these windings being severally arranged opposite the pole end faces of the magnet and being reversely wound so that the magnetomotive forces generated by these windings cancel out each other and thereby eliminate magnetic hysteresis. The pivotal movement of the rotor is converted to translational or rectilinear movement of an output drive element through a substantially frictionless band drive having no backlash. The actuator is preferably arranged in a closed servo loop so that the proportionality of its response can be utilized.

REFERENCES:
patent: 1464824 (1923-08-01), Kollock et al.
patent: 2718614 (1955-09-01), Gamble
A. Staniforth "Rotary-to-Linear Actuator", Reprint of May 1960, Issue of Electrical Manufacturing, July 18, 1960.

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