Design of Motor Speed Control System Based on STM32 Microcontroller

With the application of embedded technology in servo motor control, the motor speed regulation method has gradually changed from analog to digital ones. Especially, DC motor control with ARM has become a new trend. We design a PID speed regulation system based on an STM32 microcontroller. The system includes an STM32F103C8T6 minimum system, power module, motor drive module, key module, MX1508 double H bridge, speed measurement module, TFT display module, and others. The design adopts the principle of pulse modulation for DC motor speed regulation based on STM32 internal PWM signal, output to MX1508 double H bridge motor drive module for driving amplification, and then drive signal output to DC motor. The duty ratio of the PWM signal is adjusted to achieve the motor steering and speed control. The system has a simple structure, strong anti-interference ability, and high cost-performance. MATLAB simulation results show that the speed regulation of PID DC motor based on the STM32 microcontroller is better than the traditional control strategy and has a good application prospect.