一种新型数字化逆变式等离子切割电源  

A novel digital inverted plasma cutting power supply

作　　者：贾德利[1] 尤波[1] 张逢靖[1] 张雪岩[1] 

机构地区：[1]哈尔滨理工大学自动化学院,黑龙江哈尔滨150080

出　　处：《电焊机》2009年第9期43-47,共5页Electric Welding Machine

基　　金：哈尔滨市优秀学科带头人研究专项基金资助项目(2006RFXXG015)

摘　　要：介绍了以TMS320LF2407数据处理器(DSP)和P89C52双芯结构为控制核心的逆变式等离子切割电源系统,包括系统构成、电源主电路、控制电路和时序控制系统等。针对切割电源工作过程中可能会出现的过/欠电压、过电流等问题,设计了专用的保护电路与吸收网络。结合电源系统具有时变性和非线性的特性,阐述了软件进行输出波形控制的基本方案以及预测PI控制算法。进行了切割厚度与最佳切割速度关系实验,结果表明,以DSP和P89C52双芯结构为核心的预测PI控制逆变式等离子切割电源系统具有良好的控制性能,且电路简单,调试方便。A inverted plasma cutting power supply system is established,in which TMS320LF2407 digital signal processing （DSP） and P89C52 dual-core structure are adopted as the central controller.The structure of the system is introduced in detail,such as the main circuit, control circuit, sequence control system.In order to avoid such problems as over/under voltage, over-current and so on, the special-purpose protection circuit and the absorption network are presented.Considered time-variation and nonlinear characteristics of the system,basic plan and predicted PI control algorithm of output waveform controlling are used,which is fulfilled by software.Results show that besides its simple structure and easy operation, the system has good controlling performance.

关 键 词：逆变电源 等离子切割 DSP 

分 类 号：TG434.1[金属学及工艺—焊接]