汽车点火系统传导电磁干扰仿真  

The simulation of conducted EMI in the ignition system for automotives

作　　者：俞集辉[1] 贾晋[1] 汪泉弟[1] 李旭 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]长安汽车工程研究院,重庆401120

出　　处：《重庆大学学报（自然科学版）》2011年第1期88-93,共6页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(50877081)

摘　　要：汽车点火系统工作时产生的电磁干扰具有能量大,频带宽等特点,被认为是汽车电磁兼容最主要的电磁干扰源。笔者提出了一种预测点火系统传导电磁干扰模型建立方法:建立系统中每个部件的电路模型,利用测量、解析法或有限元方法确定模型中的分布参数,集成为点火系统等效电路模型进行系统仿真计算。时域与频域实验测试结果证实了该模型的正确性与方法的可行性。The ignition system in automobiles is a main source of electromagnetic interference（EMI）,because the electromagnetic emission from the system has the characteristics of high-energy and wide-bandwidth.A method for EMI prediction based on its components＇ circuit models is presented.First,the characteristics of the components are analyzed and the equivalent circuits are drew;then,the parasitic parameters of the electromagnetic device are extracted from measurement,analytical solution or finite element method（FEM）;and finally,the circuit model of the whole ignition system model in high frequency condition is established.This model is verified by the measurement and simulation results in time domain and in frequency domain.

关 键 词：点火系统 传导电磁干扰 分布参数 有限元方法 等效电路模型 

分 类 号：TM154[电气工程—电工理论与新技术]