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阐述了一种额定电流为 4 0 0A、引入了微机控制的新型逆变二氧化碳焊机的研制实施方案 .在对逆变理论和微机控制技术进行研究的基础上 ,采用绝缘栅双极晶体管 (IGBT)作为功率开关器件 ,主电路选择双全桥结构以满足大功率输出的需要 ,并对送丝系统进行了改造 ,以适应微控系统的要求 .控制系统以 80 31单片机为核心 ,应用脉宽调制方式 ,经系统扩展和系统配置构成 ,成功地实现了平特性配合等速送丝 .应用微机控制 ,简化了系统硬件 ,提高了系统的控制性能 ,而且软件设计灵活 ,容易扩展功能 .试验结果表明 ,所研制的焊机工艺性能良好 ,在最佳焊接规范条件下飞溅率基本控制在 3%以下 ,明显提高了焊接质量
A kind of new inverter carbon dioxide welding machine with microcomputer control is introduced in this paper.It is based on the research of inverter theory and microcomputer control technology that insulated-gate bipolar transistor (IGBT ) As a power switching device, the main circuit to select double bridge structure to meet the needs of high-power output, and the wire feed system has been modified to meet the requirements of micro-control system.Control system to 8031 as the core microcontroller, the application of pulse width modulation Mode, which is composed of system expansion and system configuration, has successfully realized the flat characteristic with the constant speed wire feeding.The application of microcomputer control simplifies the system hardware and improves the control performance of the system, and the software has the advantages of flexible design and easy expansion of functions. , Developed by the welding process performance is good, under the best welding specifications under the basic control of the spatter rate below 3%, significantly improving the quality of welding