摘要
高功率电力电子设备的应用对功率电感的高频电感性能和能量效率提出了更高的要求,迫切需要开发高频低损耗的软磁材料。为降低软磁复合材料的涡流损耗,获得高频低损耗、大功率的一体成型电感,通过等离子体炬制备了高纯度亚微米FeNi颗粒,并采用简化的有限元模型探讨了亚微米FeNi颗粒对软磁复合材料涡流损耗的影响。本工作制备了含不同质量分数亚微米FeNi颗粒的Fe/亚微米FeNi软磁复合材料,重点讨论了亚微米FeNi颗粒对软磁复合材料及一体成型电感性能的影响。结果表明:与纯羰基铁粉制备的软磁复合材料相比,当亚微米FeNi颗粒质量分数为30%时,环形磁芯代表损耗的磁导率虚部µ″由1.57降至1.36,降低了13.4%;一体成型电感在10 MHz条件下的品质因数Q由13升至20,提高了53.8%,并且自谐振频率提高了12.7%,饱和电流由2.148 A升至2.352 A。通过提高材料内阻和减小涡流流动区域的尺寸,亚微米FeNi颗粒能有效降低涡流损耗,提高软磁复合材料的高频磁导率稳定性。复合亚微米FeNi颗粒有望低成本、大规模地获得高频低损耗、综合性能良好的一体成型电感。
Application of high-power electronic equipment requires inductors with greater high-frequency performance and higher energy efficiency than ever,and thus it is urgent to develop new soft magnetic composites to meet these requirements.To reduce the eddy current loss of soft magnetic composites and obtain molded inductors with high working frequency,low loss and high power,high purity submicron FeNi particles were prepared by plasma torch,and effect of these particles on eddy current loss of soft magnetic composites was examined by simplified finite element model.Soft magnetic composites and molded inductors were prepared by mixing carbonyl iron powder and submicron FeNi particles with different mass fractions.The influence of submicron FeNi particles on the properties of soft magnetic composites and molded inductors is analyzed emphatically.With 30%of mass fraction of submicron FeNi particles,the imaginary part of permeability(μ")of the ring core decreases from 1.57 to 1.36(reduced by 13.4%),compared with that of the soft magnetic composite made by only pure carbonyl iron powder.The quality factor Q of the molded inductors at 10 MHz increases from 13 to 20(increased by 53.8%),while the self-resonance frequency increases by 12.7%and the saturation current increases from 2.148 A to 2.352 A.Submicron FeNi particles can effectively reduce eddy current loss and improve stability of the high frequency permeability of soft magnetic composites by increasing the internal resistance of materials and reducing the size of eddy current flow region.Therefore,this study demonstrates that compounding submicron FeNi particles is a promising method to obtain molded inductors with high frequency,low loss,and good comprehensive performance at low cost on a large scale.
作者
何思哲
王俊舟
张勇
费嘉维
吴爱民
陈意峰
李强
周晟
黄昊
HE Sizhe;WANG Junzhou;ZHANG Yong;FEI Jiawei;WU Aimin;CHEN Yifeng;LI Qiang;ZHOU Sheng;HUANG Hao(Key Laboratory of Energy Materials and Devices(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China;Guangdong Fenghua Advanced Technology Holding Co.,Ltd.,Zhaoqing 526199,China;Mingxin Soft Magnetic Technology(Jiangsu)Co.,Ltd.,Kunshan 215300,China)
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2024年第8期871-878,共8页
Journal of Inorganic Materials
基金
新型电子元器件关键材料与工艺国家重点实验室开放基金(风华-2024-0064)。
