电动车整车辐射发射EMC仿真分析

EMC Simulation and Analysis of Electric Vehicles Radiation Emission

依照GB/T 18387—2017标准对于电动车辆电磁场发射强度限值的要求,对一款纯电新能源汽车进行辐射发射EMC仿真分析。选取车身、零部件、高压线束3D数据模型并在Hyper Mesh中进行网格剖分,在FEKO中设置暗室环境、天线等相关参数并运行求解S参数。通过实验测得的干扰源电流及阻抗参数并建立干扰源模型。利用端口网络理论,结合S参数模型,经过计算得到天线端的电磁场。通过仿真结果与实车测试数据对比,评估仿真预测的准确性。

EMC simulation analysis of radiation emission from a pure electric new energy vehicle is carried out in accordance with the requirements of GB/T 18387-2017 for the limits of electromagnetic field emission intensity of electric vehicles.The 3D data model of car body,spare parts,high voltage harness is selected and meshed in Hyper Mesh.The relevant parameters such as darkroom environment and antenna are set in FEKO and the S parameter is solved.The current and impedance parameters of the interference source are measured by experiments and the interference source model is established.Using port network theory and S parameter model,the electromagnetic field at the antenna end is calculated.The accuracy of simulation prediction is evaluated by comparing the simulation results with the real vehicle test data.