System and method for driving an industrial control device

Details System and method for driving an industrial control device System and method for driving an industrial control device

2008-05-12

2009-10-06

Jackson, Stephen W (Department: 2836)

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

Reexamination Certificate

active

07599163

ABSTRACT:
A process control apparatus including an actuator configured to effect changes in an industrial process, a power supply, a plurality of current switches coupled between the actuator and the power supply and a controller coupled to the plurality of current switches. The controller is configured to selectively close one or more of the plurality of current switches so as to provide a selectable level of current from the power supply to the actuator. In variations, a plurality of discharge switches are coupled to the actuator and the controller is configured to selectively close the discharge switches so as to provide a selectable level of charge to discharge from the actuator.

REFERENCES:
patent: 6095175 (2000-08-01), Miller et al.
patent: 6376966 (2002-04-01), Gallmeyer et al.
patent: 2002/0033644 (2002-03-01), Takamura et al.
patent: 2006/0098036 (2006-05-01), Gardner

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