線束屏蔽層接地位置對整車輻射發(fā)射的影響

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【關鍵詞】輻射發(fā)射；電磁兼容；寬帶輻射發(fā)射；屏蔽層；噪聲路徑 中圖分類號：U463.62 文獻標識碼：A 文章編號：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

當前，中國汽車產業(yè)迅猛發(fā)展，新技術、新產品不斷涌現，汽車上的電子設備不斷增多，電氣架構也變得多樣化，汽車產生的電磁兼容問題及面對的電磁兼容環(huán)境越來越復雜。（剩余3331字）