D.C. power control for D.C. solenoid actuators

Details D.C. power control for D.C. solenoid actuators D.C. power control for D.C. solenoid actuators

1985-10-10

1986-12-16

Gellner, Michael L.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

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

361194, 361203, H01H 4722

Patent

active

046301658

ABSTRACT:
A D.C. power control for a D.C. solenoid actuator which may be used for a D.C. solenoid operated valve uses a timer circuit for switching from an initial high pull-in power after a predetermined delay to a low hold power for the valve solenoid utilizing a pulse control where the valve "on" time is held constant and the "off" time is varied. The pulses are high frequency to prevent the valve from switching with each of the pulses while enabling the average current in the valve solenoid coil to be controlled independently between the pull-in and hold current values.

REFERENCES:
patent: 3579052 (1971-05-01), Kato et al.
patent: 3864608 (1975-02-01), Normile et al.
patent: 4327394 (1982-04-01), Harper

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