Effects of MnZn ferrite doping on magnetic and electrical properties of NiZnCu ferrite toroid cores for power applications
NiZnCu ferrite has been widely used in high-frequency power converters due to its higher electrical resistance than MnZn ferrite.However,the permeability of NiZnCu ferrite is lower than MnZn ferrite.It is possible to get higher permeability and take higher frequency for NiZnCu ferrite by doping with MnZn ferrite.In this paper,the effects of MnZn ferrite doping on magnetic and electrical properties of NiZnCu ferrite toroid cores were investigated.The microstructures of the toroid cores were characterized by SEM.The permeability and inductance versus frequencies and DC-bias were tested by an impedance analyzer.The results show that both the permeability and the inductance versus frequencies and DC-bias are improved by doping appropriate of MnZn ferrite.However,the permeability and the inductance are not further improved when adding more amount of MnZn ferrite.The optimum amount of MnZn ferrite is about 7.5 wt%.
NiZnCu ferrite MnZn ferrite Complex permeability Inductance Operating frequency
Junchang Liu Yunhui Mei Xin Li Guo-Quan Lu
School of Materials Science and Engineering Tianjin University Tianjin,P.R.China Department of Materials Science and Engineering Virginia Tech Blacksburg,USA
国际会议
上海
英文
965-968
2018-08-08（万方平台首次上网日期，不代表论文的发表时间）