X电容与PWM控制器配合之风险分析  

Risk Analysis on System of PWM Controller and Motor with X Capacitor

作　　者：吴慧燕 郭红梅 Wu Huiyan;Guo Hongmei

机构地区：[1]博世汽车部件(长沙)有限公司

出　　处：《安全与电磁兼容》2024年第4期74-78,共5页Safety & EMC

摘　　要：文章讨论了车辆中基于PWM控制的域控制器与被控电机(例如空调鼓风机、车窗、座椅、方向盘管柱电机)中的X电容在配合时的冲突问题。提供了整车中这种搭配出现的背后原因,分析了包含电容热问题、器件损坏、控制器功能受影响、电磁兼容表现变差等可能性的风险,并以三个容值为代表提供测试数据验证了分析结果。还提供了电磁兼容视角下,基于失配系统的传导发射理论分析和测试验证,并提出取消电机端的X电容,取而代之的是在控制器端加此电容的方案。This document focuses on the analysis of conflict between PWM-based controllers and X capacitor inside DC motors in vehicles,such as air conditioning blowers,windows lift motors,seat motors,steering wheel column motors.The background was described,possible technical risks were analyzed,including risk of thermal problem,elements damaging,function losing,EMC performance getting worse.Verification based on 3 capacitance was done,test data was analyzed and presented,as well as the impact based on the electromagnetic compatibility view was analyzed,and propose to implement X capacitor inside controller,instead of X capacitor inside motor.

关 键 词：电磁兼容 域控制器 X电容 电容热风险 PWM控制器 

分 类 号：U463.6[机械工程—车辆工程]