车载雨刮电机电磁辐射干扰仿真模型

提出了基于仿真软件HFSS的车载雨刮电机辐射干扰仿真模型。分析了雨刮电机产生电磁辐射的原理,进而建立了车载雨刮电机辐射模型。在HFSS中将车体结构分解成若干简单模块,各模块的关键点坐标从导入的汽车CAD模型中提取,并分别对其进行网格剖分,然后组合成车体的有限元网格模型;利用自适应网格剖技术,得到满足精度要求的仿真结果;仿真结果与实测值变化趋势一致,峰值频点吻合,表明仿真模型是正确的,可用于雨刮电机在整车上的辐射干扰预测。研究方法有较高的通用性,对汽车其它电器部件或子系统的整车辐射仿真分析具有很好的参考价值。

Simulation model on the radiated electromagnetic interference of wiper motor inside automobile

The radiated electromagnetic interference(EMI)simulation model of the wiper motor inside automobile is presented by using simulation software HFSS.The radiated EMI theory of the wiper motor is analyzed and the radiated EMI simulation model of the wiper motor inside automobile is established.Automobile body is broken down into several simple modules whose key point coordinates are extracted from the imported CAD model,then these modules’ initial meshing are generated and combined into the finite element mesh model of automobile.The simulation results can be obtained with enough accuracy requirements through adaptive meshing.The simulation results coincide well with experimental results,which shows that the established simulation model is correct and it can be used for predicting the radiated EMI of the wiper motor inside automobile.This research method has high versatility and a good reference value for the radiated EMI simulation of other electrical components or subsystem inside automobile.