粘结NdFeB磁环制备与多极充磁研究  

Preparation of bonded NdFeB magnetic ring and research on multi-pole magnetization

作　　者：苏禄水 杨友文[1] 李冰冰 周近贤 贾梦珂 黄梵 张恩华 方晓刚 刘继广[1] SU Lu-shui;YANG You-wen;LI Bing-bing;ZHOU Jin-xian;JIA Meng-ke;HUAN Fan;ZHANG En-hua;FANG Xiao-gang;LIU Ji-guang(School of Materials Science and Engineering,Hefei University of Technology,Hefei,230009,China;Anhui Heng magnetic electric Co,Ltd,Liuan 237000,China)

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]安徽恒磁磁电有限公司,安徽六安237000

出　　处：《磁性材料及器件》2025年第1期14-20,共7页Journal of Magnetic Materials and Devices

基　　金：安徽省重点研发计划项目(202104A05020001,202304a05020038)。

摘　　要：采用模压成型法制备出高精度粘结NdFeB磁环,并在其表面沉积一层环氧树脂涂层。基于有限元分析软件COMSOL建立充磁夹具模型,对磁环脉冲充磁的磁场分布进行模拟计算,分析了放电电容初始电压、夹具铁芯材料及导线形状对充磁效果的影响。研究发现,以Q235钢为铁芯材料、绕线为矩形导线的充磁夹具相较于以45号钢、圆形截面导线制成的夹具能产生更强的磁场对磁环进行充磁。依据仿真结果,制作出夹具并对磁环进行极宽为3.2 mm的径向24极充磁。The high-precision bonded NdFeB magnetic rings were fabricated using the molding technique, followed by deposition of an epoxy resin coating onto their surface. Based on the finite element analysis software COMSOL, the magnetic field distribution of the bonded NdFeB magnetic rings was simulated. The magnetization effect was examined in relation to the initial voltage of the discharge capacitor, jig core material and wire shape. It was found that a magnetizing fixture with a Q235 steel core material and a rectangular wire winding produces a stronger magnetic field with a smoother peak area to magnetize the ring compared to a fixture with 45 steel and round wire. A fixture prototype was fabricated based on the simulation results, and a 24-pole magnetization with a pole width of 3.2 mm was performed on the magnetic rings.

关 键 词：粘结NdFeB磁环 径向多极充磁 磁通密度 有限元模拟 

分 类 号：TM273[一般工业技术—材料科学与工程]