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H bridge slow decay inductance voltage
H bridge slow decay inductance voltage




h bridge slow decay inductance voltage

The motor is turned on by switching on FETs such that a voltage is applied across the motor winding. This plug-and-play scheme eliminates any need for tuning the motor.Īn H-bridge comprising four MOSFETs are used to drive motor winding. This article introduces an intelligent decay scheme that minimizes ripple, responds quickly to step changes, adapts to changes in supply, load and back-EMF. The fixed-decay scheme selected can become sub-optimal over time as battery supply voltage and motor characteristics change, and so on, as does not handle back-EMF well. 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.






H bridge slow decay inductance voltage