摘要
逆变式焊条电弧焊 (SMAW)电源及其电弧负载是典型的强非线性时变系统 ,对该系统建模并准确地找到其动态特性的解析解是相当困难的 ;用其它仿真方法求解往往较复杂且一般只能得到小信号近似解。集成在Matlab中的动态系统建模、仿真工具Simulink具有编辑可视化以及极高的编程效率 ,对该类系统的仿真研究具有极大的优越性。通过建立SMAW电源在焊接状态时的完整的Simulink仿真模型 ,尤其突出的是其中的PWM模型 ,人工运条电弧等模型的成功建立。仿真试验研究了电弧电压、电流及弧长和时间的关系 ;采用霍尔集成传感器实时采集信号 ,由高频记忆示波器记录输出测量结果 ,仿真试验结果与实际测量结果一致。因而 。
Shielded metal arc welding inverter and the arc load is a typical kind of non linear system,it's difficult to establish a model and find accurate transient response solution.Moreover,other simulation methods can only get approximate solution within small signal range.Simulink software is superior for simulating this kind of system.We setup a Simulink simulation model for SMAW inverter,especially the PWM model and arc load model.The relation between voltage,current,arc height and time is studied by simulation.Using LEM sensor and scope that can store data experiment results obtained are consistent with simulation results.So the model is very useful for studying SMAW inverter.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2002年第5期31-34,共4页
Transactions of The China Welding Institution
基金
哈尔滨市重点科技攻关项目 (9812 110 77)
