Method for controllably positioning a solenoid plunger

Details Method for controllably positioning a solenoid plunger Method for controllably positioning a solenoid plunger

1988-04-06

1989-03-21

Rosenthal, Arnold

Fluid handling

Processes

25112905, 25112908, 137468, 137486, 1374875, 310 15, 310 23, 318135, F16K 316

Patent

active

048134430

ABSTRACT:
An improved method for controllably positioning the plunger of a solenoid apparatus at a target position between its two extreme positions. The plunger is spring biased to a retracted position, and an electrical coil is intermittently pulsed to drive the plunger against the spring bias toward an extended position, such that the plunger oscillates about the target position. A precise, stable control of the plunger's oscillating motion about the target position is achieved by continuously measuring the plunger's actual position, in real time, based on a series of measurements of electrical current conducted through the electrical coil when it is being pulsed.

REFERENCES:
patent: 3307824 (1967-03-01), Weisheit
patent: 3424951 (1969-01-01), Barker
patent: 3476128 (1969-11-01), Barker
patent: 3659631 (1972-05-01), Rakoske
patent: 3874407 (1975-04-01), Griswold
patent: 4313465 (1982-02-01), Holzem et al.
patent: 4319606 (1982-03-01), Hoogenboom
patent: 4373697 (1983-02-01), Phelps
patent: 4548047 (1985-10-01), Hayashi et al.

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