作者：宋波, 田忠, 王旭, 丁卫东
作者单位：电子科技大学电子科学技术研究院, 四川 成都 611731
关键词：磁屏蔽;有限元;感应加热;电磁热水器
摘要：
为降低电磁热水器工作时产生的磁场干扰，需要进行磁屏蔽的设计。针对某电磁热水器，采用有限元软件仿真对高频和低频屏蔽方式的屏蔽效能及其对系统效率的影响展开研究。研究屏蔽壳厚度、两线圈距离及其电流相位差等因素对热水器产生的磁场强度的影响。结果表明：该电磁热水器更宜采用高频屏蔽方式，两线圈电流反相、缩小两线圈间距等措施可降低热水器周围磁场强度，更有利于磁屏蔽的设计。
Magnetic shielding analysis of electromagnetic water heaters by finite element method
SONG Bo, TIAN Zhong, WANG Xu, DING Weidong
Research Institute of Electronic Science and Technology, University of Electronic Science and Technology, Chengdu 611731, China
Abstract: In order to reduce the magnetic interference of electromagnetic water heaters in work, it is necessary to design magnetic shielding. Certain eletromagnetic water heaters were selected as the object of study. Finite element software was used to simulate the shielding effectiveness of low-and-high frequency shielding methods and its impact on system efficiency. It is aimed to analyze the effect of the shielding case thickness, distance and currunt phase of two coils on the magnetic field strength generated by the electromagnetic water heaters. The experimental results suggest that the high-frequency shielding method is more suitable than the low-frequency shielding method, and the measures to invert the current phase of two coils or to shorten the distance thereof can reduce the magnetic field strength around these water heaters, which is more favorable for magnetic shielding design.
Keywords: magnetic shielding;finite element;induction heating;electromagnetic heater
2016, 42(7): 131-135 收稿日期: 2015-7-3;收到修改稿日期: 2015-8-13
基金项目:
作者简介: 宋波(1989-),男,河北沧州市人,硕士研究生,专业方向为无线电能传输。
参考文献
[1] 陆玲霞,汪雄海. 电磁水热系统的设计和实现[J]. 机电工程,2012,19(6):52-54.
[2] DAVIES E J. General theory of eddy current couplings and brakes[J]. Proceedings of the Institution of Electrical Engineers,1966,113(5):825-837.
[3] SERGEANT P, DUPRE L, MELKEBEEK J. Active and passive magnetic shielding for stray field reduction of an induction heater with axial flux[J]. IEE Proc Electr Power Appl,2005,152(5):1359-1364.
[4] PETER L S, LUC R D, MARC D W, et al. Optimizing active and passive magnetic shields in induction heating by a genetic algorithm[J]. IEEE Transactions on Magnetics,2003,39(6):3486-3496.
[5] SERGEANT P, HECTORS D, DUPRE L, et al. Thermal analysis of magnetic shields for induction heating[J]. IET Electr Power Appl,2009,6(3):543-510.
[6] 路宏敏. 工程电磁兼容[M]. 西安:西安电子科技大学出版社,2004:75-113.
[7] 姚淳,郭祥玉. 电磁屏蔽技术探讨[J]. 电源技术运用,2005, 8(4):36-41.
[8] ERICKSON R W. Fundamentals of power electronics[M]. Secaucus:Kluwer Academic Publishers,2000:97-102.
[9] 王岩. 用传输线输入阻抗原理确定屏蔽体屏蔽性能[D].北京:北京邮电大学,2007.
[10] 徐亮. 缝隙对屏蔽效能的影响分析[J]. 信息与电子工程,2008(3):19-22.
[11] 赵博,张洪亮. Ansoft 12在工程电磁场中的应用[M]. 北京:水利水电出版社,2010:145-153.
