Digital control system for pulsed MIG welding power based on STM32  

作　　者：吴开源 章涛 何祖伟 李华佳 程佳 

机构地区：[1]School of Mechanical and Automotive Engineering, South ChinaUniversity of Technology, Guangzhou, 510640.

出　　处：《China Welding》2015年第2期75-80,共6页中国焊接（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China （Grant No. 51205136） , the Specialized Research Fund for the Doctoral Program of Higher Education of China （ Grant No. 20100172120003 ） and the Fundamental Research Funds for the Central Universities （Key Program） （ Grant No. 2013ZZ034）.

摘　　要：Digital control system for pulsed MIG welding power based on STM32 is set up with 32-bit STM32FlO3ZET6 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 soft-switching 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 pegrect pulsed MIG welding technique with stable welding process and good weld appearance, fully demonstrating the advantages of digital control based on STM32.Digital control system for pulsed MIG welding power based on STM32 is set up with 32-bit STM32FlO3ZET6 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 soft-switching 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 pegrect pulsed MIG welding technique with stable welding process and good weld appearance, fully demonstrating the advantages of digital control based on STM32.

关 键 词：pulsed MIG welding digital control STM32 phase-shifted full-bridge soft-switching 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TG434.5[自动化与计算机技术—控制科学与工程]