Interleaved Parallel Two-Transistor Forward Converters for Pulsed MIG Welding

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Wang, Linbing^1 ; Yin, Xiaoya^1 ; Xiao, Youxuan^1 ; Yan, Jin^1 ; Lian, Bin^2

School of Aeronautics, Northwestern Polytechnical University, Xian, China^1

Dongguan Sanhang Civilmilitary Integration Innovation Institute, Dongguan, Guangdong, China^2

关键词: Current loop;    Double closed-loop controllers;    Hardware structures;    Overall controls;    Pulsed MIG welding;    Small signal model;    System scheme;    Two-transistor Forward converters;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/4/042006/pdf
DOI  :  10.1088/1757-899X/452/4/042006

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, a pulsed MIG welding power system based on the interleaved paraller two-transistor forward converter is studied. The hardware structure principle diagram and overall control scheme of the system are analyzed. This paper focuses on the analysis of the small-signal model of the main circuit, and establishes the transfer function of the arc-length loop and the current loop respectively, and designs a double closed-loop controller. Experiments were carried out according to the paper's scheme. The experimental waveforms prove that the power system scheme of this paper is correct and feasible.