Electromechanical transducer controlling device

Details Electromechanical transducer controlling device Electromechanical transducer controlling device

1983-12-21

1985-11-19

Rubinson, Gene Z.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

123490, F02B 300

Patent

active

RE0320358

ABSTRACT:
A device for controlling an electromechanical transducer such as a proportional electromagnetic valve, in which a pulse signal having a constant period shorter sufficiently than the minimum response time required for the displacement of the plunger of the proportional electromagnetic valve over its predetermined full stroke is applied to the electromagnetic coil of the proportional electromagnetic valve to superpose a very small vibratory stroke component on the stroke of the plunger, and the duty cycle of the pulse signal applied to the electromagnetic coil is varied so as to urge the plunger in directly proportional relation to the variation of the duty cycle without substantially giving rise to mechanical hysteresis in the stroke of the plunger.

REFERENCES:
patent: 3659631 (1972-05-01), Rakoske
patent: 3725747 (1973-04-01), Cowan
patent: 3745420 (1973-07-01), Hafner
patent: 3870931 (1975-03-01), Myers
patent: 4366524 (1982-12-01), Kuroiwa
patent: 4434933 (1984-03-01), Tamura
"Pulse-Width Modulation of Magnets," T. L. Wells, IBM Tech. Disclosure Bulletin, vol. 21, No. 3, Aug. 1978.

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