![]() ![]() The right setting depends on various factors such as supply voltage, current being regulated, motor characteristics, motor speed and back electromotive force (back-EMF). A typical pulse-width modulation (PWM) control loop used today has a suite of fixed-decay schemes such as slow, fast and mixed decay to handle the re-circulation (decay) current.įinding a decay scheme that works for a stepper motor system is time-consuming and involves trade-offs. The scheme of current control also determines the power efficiency of the motor drive system. A typical pulse-width modulation (PWM) control loop used today has a suite of fixed-decay schemes such as slow, fast and mixed decay to handle the re-circulation (decay) current.Ĭlosed-loop current regulation in stepper motors plays a major role in determining the accuracy and smoothness of motor motion. By Rakesh Raja and Sudhir Nagaraj || Closed-loop current regulation in stepper motors plays a major role in determining the accuracy and smoothness of motor motion. ![]()
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