Solenoid driver circuit

Details Solenoid driver circuit Solenoid driver circuit

1987-01-30

1988-07-12

Hix, L. T.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

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

361156, H01H 4700, H01H 4732

Patent

active

047574186

ABSTRACT:
A solenoid driver circuit having a power supply, a capacitor connected to the power supply, a current pump which oscillates between the on and off condition to charge the capacitor from the power supply, a voltage limiting circuit which limits the voltage of the charge on the capacitor, a solenoid connected to the capacitor and, a solenoid switch which, when activated, closes such that the charged capacitor discharges through the solenoid. After the capacitor is discharged, holding current is supplied to the solenoid from the power supply. The current pump is held off while the solenoid switch is closed so that the current pump will not attempt to charge the capacitor while holding current is being supplied to the solenoid.

REFERENCES:
patent: 3626159 (1971-12-01), Chumley
patent: 3760391 (1973-09-01), Wolf et al.
patent: 4112477 (1978-09-01), Sherwin
patent: 4136819 (1979-01-01), Torita et al.
patent: 4365718 (1982-12-01), Howerton
patent: 4604675 (1986-08-01), Pflederer

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