基于DSP的变极性电源双逆变协调控制  

Double inverted coordination control of Variable polarity power source base on DSP

作　　者：姚河清[1] 王守艳[1] 范兴辉[1] 尹永珍[1] 

机构地区：[1]河海大学机电学院,江苏常州213022

出　　处：《电焊机》2008年第5期53-56,共4页Electric Welding Machine

基　　金：河海大学优秀硕士论文培育基金资助项目

摘　　要：针对IGBT二次逆变技术,设计了以DSP(数字信号处理器)芯片TMS320LF2407为核心的双逆变控制系统。提出了变极性电源两次逆变的协调控制要求,即一次逆变控制信号和二次逆变控制信号在相位上严格同步,并且二次逆变控制信号正负半波时间都是一次逆变控制信号周期的整数倍。并利用软件解决了两次逆变协调问题,避免了由于变压器直流磁化导致的一次侧功率开关管过流烧损,提高了焊机的稳定性。A variable polarity TIG interver welding control system ,which adopt double inverter technology using isolated gate bipolar transistor,was developed based on TMS320LF2407 digital signal processing chip.Coordination control reqnirements of double inverted is introduced in variable polarity power source.That is the control signal of first and second stage inverter must be synchronous and positive and negative half-wave time of second stage inverter are the same as whole cycle several times of the first stage.Damagement of the first stage IGBT is avoided.The satibily of welding machine is improved.

关 键 词：变极性 数字信号处理器 同步协调 

分 类 号：TG434.1[金属学及工艺—焊接]