方波驱动永磁无刷直流电动机用烧结铁氧体多极磁环  

Development of sintered ferrite multipole magnetic ring for brushless direct current motor(BLDCM)driven by square wave

作　　者：吕欢剑 郭德森[2] LV Huan-jian;GUO De-sen(Hangzhou Spanner Technology Co,Ltd,Hangzhou 311305,China;The 28th Institute,China Electronics Technology Group Corporation,Nanjing 210007,China)

机构地区：[1]杭州史宾纳科技有限公司,浙江杭州311305 [2]中国电子科技集团公司第28研究所,江苏南京210007

出　　处：《磁性材料及器件》2020年第5期43-45,49,共4页Journal of Magnetic Materials and Devices

摘　　要：针对方波驱动永磁无刷直流电机内转子表面磁通密度分布波形的技术要求,采用干压成型方法制备表面磁通密度为梯形波分布的烧结永磁铁氧体各向异性多极磁环。主要介绍了取向磁路设计、取向夹具制作、干压成型工艺及径向多极充磁原理。制得的4极梯形波磁环表面磁通密度峰值大于1700G,单磁极包络面积大于120000G·(°),满足小功率方波驱动永磁无刷直流电动机应用要求。According to the technology requirement of surface flux density waveform for inner rotor of brushless direct current motor(BLDCM),the sintered permanent magnet ferrite multipole with trapezoidal distribution of surface flux density was produced by dry compression molding method.Design of oriented magnetic circuit,fabrication of orientation fixture,dry compression molding process and principle of radial multipole magnetization were introduced mainly.The 4-pole trapezoidal wave magnetic ring was prepared with peak surface flux density of greater than 1700 G and single-pole envelope area of greater than 120000 G·(°),meeting the application requirements for small power BLDCM.

关 键 词：永磁电机 永磁铁氧体 径向多极磁环 梯形波 表面磁通密度 

分 类 号：TM273[一般工业技术—材料科学与工程]