Electro-mechanical actuator

Details Electro-mechanical actuator Electro-mechanical actuator

1992-03-06

1995-03-07

Wysocki, Jonathan

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318135, 310 12, 335234, 335253, G05B 1100, H02K 4102

Patent

active

RE0348708

ABSTRACT:
An electro-mechanical actuator has a ferrous alloy armature movably mounted within a body chamber. Two axially-spaced permanent magnets are arranged radially inwardly of the chamber and partially define the chamber at the ends thereof. A coil surrounds the chamber. The body is formed of a magnetically-permeable material. Because of the high reluctance of the magnets, each magnet forms a short magnetic loop which passes through the adjacent air gap, and forms a long magnetic loop which encircles the coil and passes through the distant air gap. The armature has a bistable toggle-like movement, and may be latched proximate either end wall. If springs are added between the armature and the body, the improved actuator may be used as a proportional position of force transducer within an operating range of armature movement.

REFERENCES:
patent: 3259810 (1956-07-01), Williams
patent: 3514674 (1970-05-01), Ito
patent: 3538359 (1970-11-01), Barowski
patent: 3571633 (1971-03-01), Timmerman
patent: 3728654 (1973-04-01), Tada
patent: 4127835 (1978-11-01), Knutson
patent: 4329672 (1982-05-01), Stahl
patent: 4346318 (1982-08-01), Shtrikman

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