摘要
为提高大电流GMAW焊接过程的稳定性,进而提高焊接效率,引入了外加间歇纵向交变磁场来控制焊接过程。采用两级逆变拓扑结构,研制出一台输出为方波交流电流,且幅值、频率和占空比均可调的磁控电源。利用可视化仿真软件Simulink建立该磁控电源的仿真模型,分析电路在不同给定参数下的仿真结果,论证了主电路拓扑结构及参数设计的合理性。加入电感负载,测试不同给定参数下磁控电源实际电流输出波形和交变磁场波形,测试结果显示设计的磁控电源能够满足频率、占空比和励磁电流幅值调节的特性。同时得到了与电源输出相匹配的交变磁场,可以用于大电流GMAW磁控焊接技术。
In order to improve the stability of the high-current GMAW(gas metal arc welding)process and thus improve the welding efficiency,an intermittent alternating longitudinal magnetic field is introduced to control the welding process.In this paper,a two-level inverter topology is used to develop a magnetron power supply whose output is a square wave AC current with adjustable amplitude,frequency and duty cycle.The simulation model of the magnetron power supply is established by using the visual simulation software Simulink,the simulation results of the circuit under different given parameters are analyzed,and the rationality of the main circuit topology and parameter design is demonstrated.Inductive load is added to test the actual current output waveform and alternating magnetic field waveform of the magnetron power supply under different given parameters.The test results show that the designed magnetron power supply can meet the characteristics of frequency,duty cycle and exciting current amplitude adjustment.At the same time,an alternating magnetic field that matches the output of the power source is obtained,which can be used in high-current GMAW magnetron welding technology.
作者
陈克选
杜茵茵
陈彦强
CHEN Kexuan;DU Yinyin;CHEN Yanqiang(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《电焊机》
2022年第3期93-98,共6页
Electric Welding Machine
基金
国家自然科学基金(51775256)。
