Actuator control system

摘要

A system comprising an actuator and a controller configured to drive the actuator with a pulse width modulated (PWM) signal. The controller is configured to limit a duty cycle of the PWM signal in response to a current supplied by the PWM signal.

主权项

1. A system, comprising:
an actuator for actuating a component of an engine; and a controller configured to drive the actuator with a pulse width modulated (PWM) signal in response to a requested duty cycle for the component; wherein: the controller is configured to limit the requested duty cycle of the PWM signal that drives the actuator in response to a current supplied by the PWM signal to drive the actuator, a present duty cycle, and a current limit associated with a threshold for damage or deterioration of the actuator, wherein a duty cycle limit is generated by dividing a product of the current limit and the present duty cycle by the current supplied by the PWM signal and the controller is further configured to limit the requested duty cycle of the PWM signal in response to the duty cycle limit.