Solenoid driver with switching during current decay from initial

Details Solenoid driver with switching during current decay from initial Solenoid driver with switching during current decay from initial

1984-03-02

1985-08-20

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

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

361152, H01H 4732

Patent

active

045368180

ABSTRACT:
A solenoid driver circuit has reduced power consumption by switching the solenoid coil current during a decay period from an initial peak current to a lower magnitude sustaining peak current. Current decays from the sustaining peak current magnitude for a predetermined length of time to a lower current level. Two transistors and a Zener diode are operatively connected to the solenoid and controlled by a logic circuit to apply the desired current to the solenoid. A sense resistor is coupled in series with the solenoid to sense current in the solenoid. The Zener diode is coupled in parallel with the sense resistor to provide a current decay path from the solenoid parallel to the sense resistor. The two transistors are turned on and off using logic flip-flops to sense voltage comparisons with the initial peak current voltage, the sustaining peak current, and the sustaining low current. A logic signal is generated as a function of the predetermined length of time, and an output signal is coupled to the bases of the two transistors to control their on/off states.

REFERENCES:
patent: 3581156 (1971-05-01), Dolbachian et al.
patent: 4180026 (1979-12-01), Schulzke et al.
patent: 4327394 (1982-04-01), Harper
patent: 4347544 (1982-08-01), Ohba
patent: 4360855 (1982-11-01), Ohba
Publication by SGS-ATES Semiconductor Corporation in Jun. 1982, entitled, "Injector Driver Control--Tentative Data".

Affiliated with

Also associated with

Rating

Solenoid driver with switching during current decay from initial does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Solenoid driver with switching during current decay from initial, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solenoid driver with switching during current decay from initial will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-564010