车载无线广播接收系统的电磁兼容性研究  

Electromagnetic Compatibility Analysis of Vehicle-mounted Wireless Broadcast Receiver Systems

作　　者：陈梦杰 黄欢 柳海明 王玮敏 赵延华 Chen Mengjie;Huang Huan;Liu Haiming;Wang Weimin;Zhao Yanhua(CATARC Automotive Test Center(Wuhan)Co.,Ltd.,Wuhan 430050,China)

机构地区：[1]中汽研汽车检验中心(武汉)有限公司,湖北武汉430050

出　　处：《专用汽车》2025年第4期36-40,共5页Special Purpose Vehicle

摘　　要：车载无线广播作为关键信息传输载体,其技术路径与电磁兼容性(EMC)问题成为研究焦点。针对EMC问题,研究了车辆上不同功能开启时对车载无线广播的影响,揭示电机驱动电路PWM调频信号的高次谐波和开关噪声是无线广播频段的主要电磁干扰源,并提出了车载无线广播接收系统EMC问题的解决方案,为智能网联汽车时代应急通信系统可靠性提供了技术支撑。Vehicle-mounted wireless broadcasting serves as a crucial information transmission carrier,and its technical approaches and electromagnetic compatibility(EMC)issues have become the focus of research.Regarding EMC issues,the impact of the activation of different functions in vehicles on vehicle-mounted wireless broadcasting has been studied.It is revealed that the high-order harmonics and switching noise of the Pulse Width Modulation(PWM)frequency modulation signals in the motor drive circuit are the main electromagnetic interference sources in the wireless broadcasting frequency band.Moreover,solutions to the EMC issues of the vehiclemounted wireless broadcasting receiving system are proposed,providing technical support for the reliability of the emergency communication system in the era of intelligent connected vehicles from a scientific research perspective.

关 键 词：车载无线广播 电磁兼容性(EMC) PWM调频信号 开关噪声 智能网联 

分 类 号：U461[机械工程—车辆工程]