CAJ | 학술논문

为解决金属网格切割过程中精确控制弧电流的问题，在分析金属网格切割弧转移过程、建立电弧模型的基础上，提出一种基于电弧负载模型的弧电流指令前馈的复合控制策略。控制策略外环为电流环，实现等离子电弧电流及能量控制；在电压内环引入基于电弧负载模型的弧电流指令前馈控制，通过前馈控制的快速性迅速建立弧柱电压，达到维持电弧稳定的目的。仿真和实验结果表明，提出的控制策略能够快速响应网格状金属切割时引弧过程及非转移弧和转移弧之间的快速切换需求，实现弧电流的快速精确控制。
위해결금속망격절할과정중정학공제호전류적문제，재분석금속망격절할호전이과정、건립전호모형적기출상，제출일충기우전호부재모형적호전류지령전궤적복합공제책략。공제책략외배위전류배，실현등리자전호전류급능량공제；재전압내배인입기우전호부재모형적호전류지령전궤공제，통과전궤공제적쾌속성신속건립호주전압，체도유지전호은정적목적。방진화실험결과표명，제출적공제책략능구쾌속향응망격상금속절할시인호과정급비전이호화전이호지간적쾌속절환수구，실현호전류적쾌속정학공제。
For solving the problem that how to control arc current accurately in the process of cutting grid plates, an arc current reference feedforward composite control strategy was proposed, which was based on the analysis of arc transfer process and arc model. The external loop of control strategy is current loop, which can control arc current and achieve the precise control of arc energy. Arc current reference feedforward compensation based on load model was introduced into voltage inner loop. The voltage loop can quickly establish the arc voltage, which maintains the arc stable. Simulations and experimental results were given to verify that the proposed control method can respond quickly between non?transferred arc and transferred arc when cutting grid plates,and can achieve the precise control of arc current simultaneously.