汽车电缆线束的电磁兼容仿真分析.pdf

汽车电缆线束的电磁兼容仿真分析 孙佳伟，张敏 （同济大学，电子与信息工程学院） 摘要：汽车上电子器件的增加，使汽车电磁兼容（EMC ）问题日益凸现。使用数值仿真技 术能在产品定型前，对产品电磁兼容进行分析和预测。汽车电缆线束及车身的复杂性，使 得汽车电缆的电磁干扰仿真分析成为一个难点。本文介绍使用 CST MICROWAVE STUDIO® （CST MWS ）和CableMod 的协同仿真的方法来解决这一问题。利用CableMod 在汽车模型中建立了简单电缆布局，并计算出沿着电缆的电流分布，此电流分布导入到CST MWS 中，进行电缆辐射分析。 关键词：汽车，电磁兼容，电缆线束，仿真 Electromagnetic Compatibility Analysis of Vehicle Cable Harness by Simulation Jiawei SUN, Min ZHANG (School of Electronics and Information Engineering, TONGJI UNIVERSITY) Abstract In consequence of more and more electrical equipments that have been introduced into the car, Electromagnetic Compatibility (EMC) is becoming an important issue in automotive industry. Numerical EMC simulation is a powerful tool to analyze the potential EMC problems early in the design process. But one of the main problems in simulation of electromagnetic interference in vehicles is caused by the complexity of cable harness. This paper introduces a combined EMC simulation with CST MICROWAVE STUDIO®(CST MWS) and CableMod to solve the problem. A simple cable harness is modeled inside vehicle body and the current distribution along the harness that simulated with CableMod is imported into CST MWS for radiation analysis. Key words Automobiles, EMC, Cable Harness, Simulation MICROWAVE STUDIO® ）是处理辐射干 1. 前言 扰问题的有力工具。但如果使用三维全波 现在越来越多的电子产品应用到汽车 分析软件直接分析电缆线束 EMC 问题， 上，以增加汽车的经济性、舒适性及安全 就必须要对电缆进行网格剖分。而电缆线 性。但车内随之不断增加的电磁噪声水平， 束的捆扎本身非常复杂，汽车内电缆的总 也成为汽车行业关注的问题之一。 长度可达 3km，加上其横截面相对于汽车 目前，汽车的电磁兼容性（EMC