Study and implementation of SPWM microstepping controller for stepper motor

Microstepping control for stepper motor is a well-known technique to improve stepper motor performance. In this paper, a digital controller for microstepping drive of stepper motor using Sinusoidal Pulse Width Modulation (SPWM) approach is proposed and the electromagnetic torque is compared to the conventional full-step methodology and the SPWM technique used for microstepping. The system has been simulated using Matlab/Simulink and the controller has been implemented using STM32F103 microcontroller. The paper presents the design, analysis, simulation and experimental results of SPWM based microstepping drive, and the simulation and experimental results depict the effectiveness of the controller.