电驱系统高压无源EMI滤波器建模研究
Study on modeling of high voltage passive EMI filter in electric drive system
廖兴林 1陈秋伯 1贾晋 2杜伟民 1龙云3
作者信息
- 1. 重庆理工大学 电气与电子工程学院, 重庆 400054
- 2. 汽车零部件先进制造技术教育部重点实验室(重庆理工大学), 重庆 400054
- 3. 重庆清研理工汽车智能技术研究院有限公司, 重庆 400050
- 折叠
摘要
实际工程中,通常使用无源EMI滤波器来抑制电磁干扰(electromagnetic interference,EMI),准确的滤波器模型对滤波器的性能仿真及优化设计具有重要意义.为此,对磁环的频变特性进行等效,采用全电路方法建立精准的EMI滤波器模型.首先,建立磁环的共模和差模高频等效电路模型,模型参数通过遗传算法获得;基于阻抗计算公式建立了X、Y电容的高频电路模型;然后,利用有限元提取了母排、接地以及PCB走线的寄生参数;根据共、差模等效原则建立0.009～60 MHz频段的全电路模型,该模型与滤波器实际的结构相对应,同时包含共模特性和差模特性;最后,通过插入损耗和端口阻抗验证了模型的有效性.
Abstract
In engineering, passive EMI filter is usually used to suppress electromagnetic interference ( EMI) .Accurate filter model is of great significance to the performance simulation and optimal design of the filter.In this paper, the frequency variation characteristics of magnetic ring are equivalent, and its influence on EMI filter performance is analyzed by full circuit method.First, the common-mode and differential-mode high-frequency equivalent circuit models of the magnetic ring are built, and the model parameters are obtained by genetic algorithm.Based on the impedance calculation formula, the high frequency circuit model of X and Y capacitors is built and the parasitic parameters of bus bar, grounding and PCB routing are extracted by finite element method.According to the principle of common-mode and differential-mode equivalence, a full-circuit model of 9kHz-60MHz frequency band is built, corresponding to the actual structure of the filter and containing both common-mode characteristics and differential-mode characteristics.Finally, the validity of the model is verified by insertion loss and port impedance.
关键词
电磁兼容/EMI滤波器/遗传算法/插入损耗Key words
electromagnetic compatibility/EMI filter/genetic algorithm/insertion loss引用本文复制引用
基金项目
重庆教委项目(KJQN202301123)
出版年
2024
国家科技期刊平台
NSTL
万方数据