基于阻抗特性的磁环应用研究
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摘要
在简要介绍磁环的基本特性及其抑制电磁干扰机理的基础上,分析了磁性材料、尺寸大小及绕线圈数这三个因素对磁环阻抗大小的影响方式。同时,基于某变频分体壁挂空调外机设计实验验证了磁环阻抗特性与其抑制电磁干扰能力的关系,即在不饱和的情况下,磁环在应用场合下的阻抗越大,抑制电磁干扰的能力越强;并且,由于特定应用下的阻抗特性与供应商提供的阻抗特性是不一定相同的,磁环在使用中需要根据实际情况进行评估,从而为电子设备电磁兼容性能整改实验提供指导。
According to the basic characteristics of inductive components and the mechanism of suppressing electromagnetic interference caused by the magnetic cores, the influence on the impedance of magnetic cores of the material type, core size and the number of turns is introduced in this paper. Meanwhile, an experiment which was based on the outdoor union of an inverter air-conditioner was designed to illustrate the relationship of impedance characteristics of a magnetic toroid and its ability to suppress electromagnetic interference. That is to say, the higher its impedance in the application is, the more it will suppress; furthermore, it needs to be evaluated according to the actual situation in the process of use because of the impedance characteristic difference between the test data and the data supplied by the manufacturer of a magnetic core, which can provide guidance for the rectification of Electromagnetic Compatibility test.
According to the basic characteristics of inductive components and the mechanism of suppressing electromagnetic interference caused by the magnetic cores, the influence on the impedance of magnetic cores of the material type, core size and the number of turns is introduced in this paper. Meanwhile, an experiment which was based on the outdoor union of an inverter air-conditioner was designed to illustrate the relationship of impedance characteristics of a magnetic toroid and its ability to suppress electromagnetic interference. That is to say, the higher its impedance in the application is, the more it will suppress; furthermore, it needs to be evaluated according to the actual situation in the process of use because of the impedance characteristic difference between the test data and the data supplied by the manufacturer of a magnetic core, which can provide guidance for the rectification of Electromagnetic Compatibility test.
引文
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[10]金鑫,王群,唐章宏.结构分隔金属软磁材料的性能[J].安全与电磁兼容,2018(2):69-73.
[11]JITOH Y,FUJII K,MATSUMOTO Y,et al.Insertion loss measurement of a ferrite clamp used in the CISPR 22radiated emission measurements[C].IEEE International Symp.on Electromagnetic Compatibility,Minneapolis,2013:6-11.
[12]URABE J,FUJII K,MATSUMOTO Y,et al.A study of EMI suppression characteristics of ferrite cores[C].IEEE17th International Symp.on Electromagnetic Compatibility,Zurich,2016:622-625.
[2]孟庆党,雷春明,李博,等.220 kV线路接地故障引起发变组高压侧断路器误跳闸原因分析及处理[J].电力建设,2011,32(8):78-82.
[3]黎凡森,曹太强,陈显东,等.基于全通滤波器的比例复数积分控制分析[J].电子技术应用,2017(3):127-131.
[4]吴航.开关电源的EMI滤波器设计与实现[D].成都:电子科技大学,2017.
[5]Li Qingmin,Wu Minglei.Simulation method for the applications of ferromagnetic materials in suppressing high frequency transients within GIS[J].IEEE Transactions on Power Delivery,2017,22(3):1628-1632.
[6]孙玉坤,李冬云,邹杰,等.我国磁性材料领域标准现状分析[J].磁性材料及器件,2016(1):67-71.
[7]张德光,胡锋.高导铁氧体宽频高阻抗共模电感设计[J].磁性材料及器件,2018(2):44-46.
[8]陈林.电力电子变换中磁性元件磁芯损耗的研究[D].武汉:华中科技大学,2012.
[9]干喆渊,王延海,张建功,等.应用磁环抑制输电线路短波频段无源干扰[J].高电压技术,2017(5):1722-1728.
[10]金鑫,王群,唐章宏.结构分隔金属软磁材料的性能[J].安全与电磁兼容,2018(2):69-73.
[11]JITOH Y,FUJII K,MATSUMOTO Y,et al.Insertion loss measurement of a ferrite clamp used in the CISPR 22radiated emission measurements[C].IEEE International Symp.on Electromagnetic Compatibility,Minneapolis,2013:6-11.
[12]URABE J,FUJII K,MATSUMOTO Y,et al.A study of EMI suppression characteristics of ferrite cores[C].IEEE17th International Symp.on Electromagnetic Compatibility,Zurich,2016:622-625.