磁路引导在感应加热系统中的应用  

Application of Magnetic Circuit Guidance in Induction Heating System

作　　者：徐微[1] 李守智[2] 李波波 杨文强 张苗[1] XU Wei;LI Shouzhi;LI Bobo;YANG Wenqiang;ZHANG Miao(Department of Electrical and Information Engineering,City College,Xi’an Jiaotong University,Xi’an Shaanxi 710018,China;School of Electrical Engineering,Xi’an University of Technology,Xi’an Shaanxi 710048,China;Nationl Institute Corporation of Additive Manufacturing,Xi’an Shaanxi 710075,China)

机构地区：[1]西安交通大学城市学院电气与信息工程系,陕西西安710018 [2]西安理工大学电气工程学院,陕西西安710048 [3]西安增材制造国家研究院有限公司,陕西西安710075

出　　处：《电子器件》2021年第5期1104-1108,共5页Chinese Journal of Electron Devices

摘　　要：针对提高感应加热系统中加热效率问题,提出了在线圈周围布置磁路引导材料的方法。首先理论分析磁路引导技术在感应加热系统中的可行性,其次采用ANSYS建立磁路引导仿真模型,得到被加热物体的温度分布,最后改变磁路引导路径,研究了不同形状磁引导外罩对感应加热效果的影响。结果表明,磁路引导能够改变线圈周围磁路的分布,实现磁能在被加热物体的上的聚焦,从而提高了感应加热效率;随着导磁外罩内侧壁长度变小,感应加热整体温度下降,但是加热均匀性变好。当电流100 A,频率1 MHz时,采用磁路引导技术后,被加热物体平均温度提高了6.5倍;导磁外罩内侧壁为0 mm时,被加热物体表面温差为22℃。In order to improve the thermal efficiency of induction heating system,a method of arranging magnetic circuit guidance material around the coil is proposed.A magnetic conductive cover with small magnetic resistance is installed around the coil to realize magnetic circuit guidance.First of all,the feasibility of magnetic circuit guidance technology in induction heating system is analyzed theoretically.Secondly,ANSYS is used to establish a magnetic circuit guidance simulation model to obtain the temperature distribution of the heated object.Lastly,the influence of different shapes of magnetic circuit guidance cover on the induction heating effect is studied by changing the path of magnetic circuit guidance.The results show that magnetic circuit guidance can change the distribution of magnetic circuit around the coil,and realize the focus of magnetic energy on the heated object,thereby improving the efficiency of induction heating.With the length of the inner wall of the magnetic conductive cover becoming smaller,the overall temperature of induction heating decreases,but the heating uniformity becomes better.At a current of 100 A and a frequency of 1 MHz,the average temperature of the heated object is increased by 6.5 times.When the inner wall of the magnetic shield is 0 mm,the temperature difference on the heated surface is 22℃.

关 键 词：磁路引导 高频 感应加热 ANSYS 

分 类 号：TN405[电子电信—微电子学与固体电子学]