线束屏蔽层接地位置对整车辐射发射的影响

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【关键词】辐射发射；电磁兼容；宽带辐射发射；屏蔽层；噪声路径 中图分类号：U463.62 文献标识码：A 文章编号：1003-8639（2025）07-0073-04

Influenceof GroundingPositionof Cable ShieldingLayeron Vehicle Radiation Emission

Wu Xiaoyu，Sun Zhiying，Qin Baoshan，Fu Guoliang，Yang Peizhou，HuangYoulin （GACGroup Automotive Engineering Research Institute，Guangzhou Automobile Group Co.，Ltd.， Guangzhou ，China）

【Abstract】With therapid developmentof thenational automobile industry，theelectro magnetic compatibility problemand theenvironmentof thevehicle become morecomplex，and theelectro magneticcompatibility testof the vehicleisvery important.Thevehicle broadbandelectro magneticradiation emision testwasconductedinaccordance with GB3466Oregulations，anditwas foundinthe testthatthebroadbandradiation emisionofanew energyelectric vehicleexceeded thestandardwhenitwasverticallypolarizedinthe30＼～40MHzband.Afterinvestigation，it was determined thatthenoiseoriginatedfrom thevehicledrivesystemand wascaused bytheexternalleakageradiationof the motortemperaturedetection harness.Thereason is thatthegrounding wireof theshielding layeristoolong，resulting in increasedhigh-frequencyimpedanceandshield failure.Theproblemofexceeding thestandardcanbesolved by shortening thelengthofthegroundingwire.Inaddition，automotiveEMCgroundingisdivided intoworkinggrounding andprotectiongrounding，and por groundingdesign willafect electromagneticcompatibility.Thispaperprovidessome ideas for vehicle EMC radiation emisson problem investigation and design control.

【Key words】 radiation emission；EMC；broadband radiation emission；shielding layer；noise path

0 引言

当前，中国汽车产业迅猛发展，新技术、新产品不断涌现，汽车上的电子设备不断增多，电气架构也变得多样化，汽车产生的电磁兼容问题及面对的电磁兼容环境越来越复杂。（剩余3331字）