Constant current actuator for inductive load

Details Constant current actuator for inductive load Constant current actuator for inductive load

1989-03-10

1989-11-28

Deboer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361154, 307 64, 307 66, 323268, H01H 4732

Patent

active

048841609

ABSTRACT:
An actuator circuit for an inductive load includes a first low impedence source of direct current at a relatively high voltage, a second low impedance source at a lower voltage, a switching arrangement responsive to an input signal for connecting a load across the first source at the beginning of the signal and for a predetermined initiating interval thereafter, and at the end of the interval switching the load from the first to the second source, and a feedback control for limiting the current through the load to a first, constant value during the initiating interval and to second, lower constant value thereafter. The circuit cuts off the load when the input signal ceases or it removed.

REFERENCES:
patent: 4035716 (1977-07-01), Hutchinson
patent: 4326234 (1982-04-01), Shuey
patent: 4456833 (1984-06-01), Traub et al.
patent: 4697221 (1987-09-01), Pasquarella
patent: 4729156 (1988-03-01), Edwards et al.
Power Linear Actuators, 1st Edition, 3/1983, pp. 253-264.

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