铝电磁铸轧系统电流因素分析及控制实现策略  

The Current Analysis and Control Strategy of Aluminum Electromagnetic Roll-casting System

作　　者：黄凯[1] 廖力清[1] 吴强 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083 [2]深圳市赛为智能股份有限公司,广东深圳518057

出　　处：《计算技术与自动化》2010年第4期1-6,共6页Computing Technology and Automation

基　　金：国家"863"高技术计划资助(2001AA337070)

摘　　要：根据铸轧区铝液在交变电磁场作用下的结晶机理,探讨励磁电流强度、电流频率、倒相周期及谐波分量等电流因素对铸轧铝带坯晶粒度的影响。基于铝电磁铸轧控制系统电流的特性,采用模糊自适应PID算法和在线查表的方法,设计一个适用于控制对象的特殊波形发生器,以便对铸轧电源的励磁电流进行实时准确的控制。试验表明,此系统可以很好的控制各电流参数,系统控制精度高、可靠性高,动态性能好,能够显著提高铝铸轧板材的质量。Based on crystallizing mechanism of Liquid aluminum in casting area under the alternating electromagnetic field,the effect of current strength,current frequency,phase reverse cycle and current harmonic components on grain size of the casting aluminum billet was researched.In order to have a real time and accurate current of variable frequency power,a specific waveform generator for the control object was designed on the foundation of fuzzy adaptive PID algorithm.The experiment show that the system can control the parameters of current well;which could improve the quality of aluminum roll-casting board obviously,and the system have high control precision,good reliability and dynamic response.

关 键 词：铝电磁铸轧 复合磁场 波形发生器 模糊自适应PID 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置]