基于DSP的晶闸管相序自适应数字控制器  

Phase sequence self-adaption digital controller for SCR based on DSP

作　　者：宋政[1] 刘伟[1] 华学明[1] 吴毅雄[1] 徐鸣 

机构地区：[1]上海交通大学焊接工程研究所,上海200030 [2]上海恒通电焊机有限公司,上海201201

出　　处：《电焊机》2006年第7期39-42,共4页Electric Welding Machine

基　　金：上海市科学技术委员会科研计划资助项目(036105001)

摘　　要：主电路为Y/△接法,同步变压器为Y/Y接法的三相全桥晶闸管焊接电源对电源三相进线接入顺序有要求。在深入分析电源三相进线不同接入顺序、三相同步电压和主回路三相线电压的相位相序关系的基础上,建立了一种基于D SP的晶闸管相序自适应数字控制器,它克服了模拟控制器的缺点,借助软件设计实现基于模拟控制的焊接电源所有功能,并具有相序自适应和缺相保护功能。焊接试验证明,基于D SP的晶闸管相序自适应数字控制器的焊接电源工作稳定可靠,能够较好满足各种焊接工艺性能。There are requirements for connection orders of the inlet wires of three-phase full bridge SCR welding power source when its main circuit adopts Y/△ connection and synchronous transformer adopts Y/Y connection.After deeply analyzing phase and phase sequence relationship between synchronous voltage and main circuit three-phase line voltage under different connection orders ,the study establishes a phase sequence self-adaption digital controller for SCR based on DSP.It overcomes weakness of traditional analog controller and uses software to realize all functions of welding power sources with analog controller,and has other functions such as self-adaptive and open-phase protection.Tests show that it runs reliably and stably,and can satisfy variety of welding process requirements.

关 键 词：DSP 晶闸管 相序自适应 

分 类 号：TG434.1[金属学及工艺—焊接]