摘要
针对新能源汽车高压线缆的电磁兼容性(EMC)设计需求,基于双层屏蔽结构中编织层与铝箔层的耦合效应,提出一种转移阻抗解析优化模型。通过引入铝箔等效阻抗公式和编织电感修正项,并结合经典解析模型,构建了双层屏蔽结构转移阻抗的解析表达式。采用三同轴B方法对双层屏蔽线缆样品进行转移阻抗测试,并将实测数据与优化模型仿真结果进行对比分析。结果表明,优化模型在不同测试工况下均能准确表征线缆表面转移阻抗特性。旨在为新能源汽车屏蔽线缆仿真模型优化提供理论与实践依据,助力提升整车电磁兼容性能。
In response to the electromagnetic compatibility(EMC)design requirements for high-voltage cables in new energy vehicles,an analytical optimization model for transfer impedance is proposed based on the coupling effect between the braided layer and the aluminum foil layer in a double-layer shielded structure.By introducing an equivalent impedance formula for the aluminum foil and a correction term for the braided inductance,combined with a classical analytical model,an analytical expression for the transfer impedance of the double-layer shielded structure was developed.The transfer impedance of double-layer shielded cable samples was tested using the triaxial B method,and the measured data were compared and analyzed with simulation results from the optimized model.The results show that the optimized model can accurately characterize the surface transfer impedance characteristics of the cable under different test conditions.This study provides a theoretical and practical basis for optimizing the simulation model of shielded cables in new energy vehicles,contributing to the improvement of overall vehicle electromagnetic compatibility performance.
作者
张颖
ZHANG Ying(School of Automotive Studies,Tongji University,Shanghai 201804,China)
出处
《汽车零部件》
2025年第7期14-20,共7页
Automobile Parts
关键词
转移阻抗
双层屏蔽线缆
电磁兼容性(EMC)
高压线缆
transfer impedance
double-layer shielded cable
electromagnetic compatibility(EMC)
high-voltage cable
