【摘要】 构建了包含输入、输出整流滤波和逆变、降压等电路的物理模型,通过非线性接口模型,研究了主回路和数字控制系统的整体建模与仿真.建立了动态焊接过程的系统数学模型,利用Matlab对焊接电源系统进行了仿真研究,然后定量分析了扰动作用下各物理量变化规律和系统动态响应过程,有效预测了脉冲MIG焊接电源的工作过程,指出了焊接电流和电弧电压控制的意义,为进一步研究指明了方向.更多还原

【Abstract】 The physical model including input and output rectifier filter,inverter and buck circuits was founded.According to actual parameters of every component,the modeling and simulation of the main loop circuit and digital control system were studied through the nonlinear interface model.Finally,the mathematical model of dynamic welding process was established to form the welding power source system model,and variation of physical quantities and dynamic response process were analyzed quantitatively.Simulation results predict the work process of the pulsed MIG welding power source,show the significance of welding current control and arc voltage control,which lay the foundation for further research.更多还原