基于Ansoft的汽车车窗电子开关PCB电磁兼容性的仿真分析

Simulation Analysis on PCB EMC of Electronic Switch from Auto Windows Based on Ansoft

摘要: 在汽车电子电路硬件设计中，最突出的问题是由于高频高速所造成的电磁兼容性问题。传统的PCB设计由于缺乏高速分析和仿真指导，信号的质量无法得到保证，本文针对汽车车窗电子开关PCB设计中高频干扰所带来的电磁兼容性问题，提出了一种新的“自上而下”的设计方法，采用软件Protel 99SE和Ansoft Designer相结合的方法对PCB板图进行电磁场仿真分析，根据仿真分析曲线对PCB进行电磁兼容性能的优化改进，通过优化改进以提高产品的电磁兼容性能。

Abstract: In the hardware design of automotive electronics, the most outstanding trouble is the electromag-netic compatibility problem caused by high frequency and speed. Due to lacking high-speed analysis and simulation guide, traditional PCB design can not guarantee signal quality. Contrary to the electromagnetic compatibility problem which is caused by high-frequency interference in PCB design of electronic switch from auto windows, this text proposes a new design technique called "Top-down", combining the software Ansoft Designer with Protel 99SE to put simulation analysis on the electromagnetic field of the PCB board diagram. According to the simulation analysis curves, we can take optimization and improvement on the PCB in order to enhance the product’s electromagnetic compatibility.