Digital control system for pulsed MIG welding power based on STM32

Digital control system for pulsed MIG welding power based on STM32 is set up with 32-bit STM32F103ZET6 directing against the pulse waveform modulation of pulsed MIG welding.High-frequency inverter and medium-low frequency pulse waveform modulation of pulsed MIG welding are realized by using the integrated PWM module within STM32 to generate PWM signals of phase-shifted full-bridge softswitching and constant-current control of output current is achieved by means of anti-windup PI control algorithm to improve the stability and reliability of control system.Experimental results demonstrate that the designed digital control system based on STM32 can achieve perfect pulsed MIG welding technique with stable welding process and good weld appearance,fully demonstrating the advantages of digital control based on STM32.