Submodulation of a pulse-width-modulated solenoid control valve

Valves and valve actuation – Electrically actuated valve – Having means to produce digital pulses

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74844, 361152, 361154, 13762564, 25112908, F16K 3106

Patent

active

048983616

ABSTRACT:
A PWM solenolid operated valve control arrangement which substantially eliminates supply voltage dependent variability of the valve without the expense or inefficiency of a conventional voltage regulator. The coil of the solenolid valve is pulse-width-modulated in relation to the commanded output result and the energization periods are submodulated in relation to the magnitude of the supply voltage. The effective voltage applied to the coil, and hence the operating characteristics of the solenoid valve, are thereby made substantially independent of supply voltage variations.

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patent: 4511945 (1985-04-01), Nielsen
patent: 4520420 (1985-05-01), Ariyoshi et al.
patent: 4536818 (1985-08-01), Nielsen

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