Control circuit for driving an electric actuator, in...

Details Control circuit for driving an electric actuator, in... Control circuit for driving an electric actuator, in...

2007-05-29

2007-05-29

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

C361S144000, C361S145000

Reexamination Certificate

active

10956071

ABSTRACT:
A control circuit that drives an electronic actuator. The control circuit includes a direct voltage source, a chopper circuit arranged between the source and an electric actuator, and an electronic control circuit designed to apply to the chopper circuit a command signal of the PWM type, with a predefined ON/OFF switching period and a predetermined duty cycle, for a predefined activation time, to produce a flow, within the electric actuator, of a correspondingly switched current having a nominal duration corresponding to the activation time. The control circuit detects the last whole or complete switching period included within the activation time, splits, in accordance with a predefined duty cycle, the final interval including the last complete switching period and any subsequent fraction of a switching period included within the activation time, and drives the chopper circuit in this final interval.

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patent: 37 22 527 (1989-01-01), None

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