逆变式空气等离子切割机低频引弧技术的研究  

Research on the Inverter Air-plasma Cutting Machine of LF Contact Pilot Arc

作　　者：孙强[1] 刘延明[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《电力电子技术》2011年第7期121-123,共3页Power Electronics

基　　金：陕西省工业攻关研究发展计划(2011K09-05);西安市科技局工业应用技术研发项目(CXY1017(1))~~

摘　　要：研制了一种全数字化控制的新型逆变式空气等离子切割机。该等离子机采用非高频的引弧技术,有效地解决了传统技术中存在的高电磁干扰、引弧电路复杂、引弧成功率低等问题。设计以高性能数字信号处理器DSP2812作为主控制芯片,通过理论分析、计算与仿真、控制算法的改进等措施,解决了低频引弧技术中的问题。实验结果表明,该机具有可靠性高、电磁干扰小、一次引弧成功率高等特点。The digital control system for air-plasma cutting inverter power supply has developed.This cutting machine based on low frequency contact pilot arc and has successfully solved the plenty of short-comings in conventional con- tact pilot arc technique, such as high electronic magnetic interference（EMI）, complex circuit and lower successful ra- tio of pilot arc and so on.The high performance DSP2812 is utilized as the mainly control chip.By theory analyse, calculate and simulation,the difficulty in low frequency contact pilot arc has been solved.The experimental results verify that the power supply system has higher stability, lower EMI and higher successful ratio of pilot arc.

关 键 词：切割机 低频引弧 半桥逆变 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]