摘要
对于送丝电机系统控制,提出一种全数字化转速外环/电流内环的控制策略,根据电机运行的不同过程分阶段采用变参数控制,提高了控制适应性.电机控制主电路采用降压电路和全桥逆变电路的级联,阐述了该主电路的工作原理,采用反接制动,提高了送丝电机制动的快速性.建立了双闭环控制框图,分析了控制系统的工作原理.结果表明,采用该方法以后送丝系统具有优良的动、静态性能和良好的送丝线性度.
A fully digitalized control strategy consisting of the outer loop of rotating speed regulation and the inner loop of current regulation for wire feed motor is proposed.Variable parameter control method is implemented according to different working procedures of the wire feed motor.The power circuit of wire feeder is composed of buck converter and full-bridge inverter,and the operation principles of the power circuit are analyzed.Also plug braking is taken to improve the dynamic response of the proposed power circuit,and double loop-closed block is established.The good dynamic and static performance of the wire feed system with this control strategy is verified by experimental results.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第3期49-52,共4页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(50807005)
中国博士后科学基金资助项目(20060390506)
关键词
送丝电机
气体保护焊
全数字化
双闭环
wire feeding motor
gas metal arc welding
digitalization
double closed loop
