基于单片机与DSP的IGBT逆变焊机数字化设计

【作者】 罗剑兵；

【导师】 习友宝；

【作者基本信息】 电子科技大学 ， 测试计量技术及仪器， 2005， 硕士

【摘要】 本课题是在成都市某电器有限公司的NB500系列IGBT逆变CO2气体保护焊机的基础上进行的电焊机的数字化研制,采用数字信号处理器和PID控制算法实现,课题具有很好的工程应用价值。课题中采用TMS320LF2407作为控制芯片设计了IGBT逆变焊机的数字化电源主控电路,采用P89C58作为控制芯片设计了控制面板电路,并设计了合理的保护电路。在此基础上通过对二氧化碳气体保护焊熔滴过渡过程分析,采用PID算法实现了对焊熔滴过渡过程的控制,并在现场焊接中调试通过,获得了较好的焊接效果。焊机的主电路和控制电路部分采取了可靠性与抗干扰设计。通过分析影响焊机正常工作的各种干扰及其产生原因,在原理图设计、PCB设计及程序编制的过中采取了软硬件抗干扰措施,保证了系统的可靠工作。通过试验,对该焊机电源各组成部分进行了分析,得到了初步的试验结果,记录了试验过程中的相关数据与波形。试验结果表明:该焊机响应速度快,硬件电路简单可靠,抗干扰能力强,能基本达到设计的构想和要求。更多还原

【Abstract】 The project discusses a digital research of welding machine based on xionggu electric company ‘s IGBT inverter CO2 protective power source of serial NB500. It is realized according to DSP and PID control algorithm and is beneficial to engineering applification. In project, using TMS320LF2407 designes the the main control circuit of IGBT inverter’s digital power and using P89C58 designes the control interface circuit .It also devises the protective circuit. According to the process’s analyse about CO2 protective welding fussion transition, it realizes the process control using PID algorithm. It is validated on the spot jointing and leads to a good performance. The main circuit and control circuit of welding machine is designed by adopting reliable and anti-interference technology,namely,analyzing the reasons of interference and taking software and hardware anti-interferece measures to ensure system works well during the process of programming, skeleton diagram and PCB design. In the experiment, we analyze the different components of welding machine power, record related data or waveform and obtain the initial result showing that the main circuit responds quickly and hardware circuit is reliable with good anti-interference ablity which do meet the primary demands.更多还原