【摘要】 以DSP(数字信号处理器)芯片TMS320F2812作为控制核心,采用IGBT二次逆变技术研制了变极性脉冲M IG焊的控制系统,一次逆变实现内环的恒流控制,二次逆变实现外环的恒压控制。系统由软件PI调节、I/O口和D/A转换器对输出焊接参数进行控制,控制精度高,明显降低了设备的复杂性,具有多焊接参数调节功能,实现了对变极性脉冲焊接电流输出波形的准确控制。更多还原

【Abstract】 A variable polarity pulsed metal inert-gas control system,which adopt double inverter technology using isolated gate bipolar transistor,was developed based on TMS320F2812 digital signal processing chip.The constant current inner loop is fulfilled in the first stage inverter,and the constant voltage outer loop is performed in the second stage inverter.By using proportional integral modulation,I/O port and D/A converter,and the output parameters of welding can be easily controlled with high precision.At the same time,the welding device has lower complexity.Moreover,the welding parameters can be regulated contemporary and output current of variable polarity pulsed welding can be exactly controlled.更多还原