SYSTEM, METHOD, AND DEVICE FOR CONTROLLING ACTUATOR DRIVE CURRENT BY USING BIDIRECTIONAL HYSTERESIS CONTROL

摘要

PROBLEM TO BE SOLVED: To provide a method for reducing heat generated by a drive actuator by performing PWM (pulse width modulation) control to downsize a heat sink.

SOLUTION: The method for controlling actuator drive current includes: a step for receiving a reference signal; a step for deciding a feedback signal at least partially on the basis of the drive current; a step for deciding an adjusted feedback signal at least partially on the basis of the feedback signal; a step for comparing the reference signal with the adjusted feedback signal; and a step for controlling the drive current on the basis of a comparison result between the reference signal and the adjusted feedback signal. The method also includes a step for operating one or more devices so as to establish at least one plus current path and at least one minus current path going through the actuator via hysteresis control.

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