基QPR的电磁搅拌实验平台设计

QPR-Based EMS Experimental Platform Design

  • 摘要: 在冶金工业中,电磁搅拌技术通过非接触式电磁力驱动金属熔液运动,对电流控制精度提出了较高要求。针对传统控制策略存在稳态误差的问题,本文引入准比例谐振(QPR)控制方法,以实现基波电流的高精度跟踪。为验证所提方法的有效性,构建了基于三相逆变系统的电流闭环控制装置,并搭建了电磁搅拌实验教学平台。实验结果表明,系统在不同设定条件下能够实现对应电流输出,并对参考电流指令进行稳定跟踪,稳态误差约为1%,验证了所提方法的有效性。该平台在保留电磁搅拌关键物理与控制特性的基础上,可用于相关实验教学,有助于理解电磁搅拌机理及其控制方法。

     

    Abstract: In the metallurgical industry, electromagnetic stirring technology is used to drive molten metal flow by means of non-contact electromagnetic forces, which places high demands on current control accuracy. To address the steady-state error associated with conventional control strategies, a quasi-proportional resonant (QPR) control method is introduced in this study to achieve high-precision tracking of the fundamental current. To verify the effectiveness of the proposed method, a current closed-loop control device based on a three-phase inverter system is constructed, and an experimental teaching platform for electromagnetic stirring is established. Experimental results show that, under different set conditions, the corresponding current output can be achieved and stable tracking of the reference current can be maintained, with a steady-state error of approximately 1%, thereby confirming the effectiveness of the proposed method. While retaining the key physical and control characteristics of electromagnetic stirring, the platform can also be used for related experimental teaching, which is helpful for understanding the mechanism and control method of electromagnetic stirring.

     

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