Straightforward Modeling of Complex Permeability for Common Mode Chokes
Straightforward Modeling of Complex Permeability for Common Mode Chokes
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DOI：
10.1541/ieejjia.7.462
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发表时间：
2018-01-01
影响因子：
1.7
通讯作者：
Hattori, Yoshiyuki
中科院分区：
文献类型：
--
作者：
Nomura, Katsuya;Kojima, Takashi;Hattori, Yoshiyuki
本文提出了一种针对共模扼流圈的复杂磁导率的简单建模方法。所提出的模型是通过称为电路划分的重复操作从单个 RL 并行等效电路获得的 RL 梯形网络。电路分割是将单个并联 RL 电路变换为两个串联并联 RL 电路，用于表达电感和电阻元件的复杂特性，例如频率相关的复磁导率。所提出的模型基本上可以重复参数拟合最多两个参数，因此拟合过程很简单。这对于工程师来说是一个很大的优势，因为无需像以前的工作那样需要特殊的额外优化程序即可获得模型。与传统的单并联 RLC 等效模型相比，通过使用该模型，可以精确拟合扼流圈的共模阻抗。此外，利用所提出的模型，通过频率和瞬态分析，不仅可以精确模拟 EMI 滤波器的插入损耗，还可以精确模拟时间波形。
This paper presents a straightforward modeling method for the complex permeability of common mode chokes. The proposed model is obtained as an RL ladder network from a single RL parallel equivalent circuit by repeated manipulation called circuit dividing. Circuit dividing is the transformation of a single parallel RL circuit into two series-connected parallel RL circuits, and is used for expressing the complicated characteristics of inductive and resistive elements such as frequency-dependent complex permeability. The proposed model can be made to basically repeat the parameter fitting up to two parameters, so that the fitting procedure is straightforward. This is a great advantage for engineers because the model can be obtained without the need for special additional optimization programs, which were required in previous works. By using this model, the common mode impedance of a choke is fitted precisely, compared to the conventional single parallel RLC equivalent model. Moreover, not only the insertion loss of the EMI filter but also a time waveform is simulated precisely by both frequency and transient analysis with the proposed model.