作　　者： ; ; ; ; ;

机构地区： 华南理工大学机械与汽车工程学院

出　　处： 《电焊机》 2008年第5期26-29,56,共5页

摘　　要： 采用高速单片机PIC16F877A和全桥移相ZVS电路,研制出脉冲MIG软开关逆变焊接电源系统。通过采用结构化程序设计方法对控制系统主程序和各个子程序进行设计,并对脉冲参数进行了优化匹配。实验测试了电源的软开关过程和外特性,能够满足脉冲MIG焊的要求。通过工艺实验验证了所设计的控制系统能够输出稳定的脉冲焊接电流和电压,可实现一脉一滴的焊接。 A new type of control system of soft-switching inverting pulsed MIG welding power supply was developed by using PIC16F877A,a high-speed MCU,and full bridge phase-shifted ZVS electric circuit.Firstly,the main program and subprograms of the control system were designed according to the structural programmed control method.Then ,the pulse parameters were optimally adjusted.Finally,the soft-switching process and external characteristics of the power were tested,and proved to satisfy the requirements of MIG welding.By lots of experiments,it was verified that stable output of current and voltage for pulse welding were obtained by this control system,and one drop per pulse welding could be realized.

关 键 词： 单片机 软开关 脉冲 焊

领　　域： [金属学及工艺]