Roadvehicles—Testmethodsforelectricaldisturbancesfromelectrostaticdischarge1ScopeThisInternationalStandardspecifieselectrostaticdischarge(ESD)testmethodsforevaluatingelectronicmodulesintendedforuseinroadvehicles,includingproceduresforevaluatingelectronicmodulesbothonthebenchandincompletedvehicles.Additionally,itspecifiesatestprocedureforclassifyingtheESDsensitivityofmodulesforpackagingandhandling,andaprocedureforcalibratingthesimulatorusedtogeneratetheelectrostaticdischarges,aswellasfunctionalstatusclassificationsforimmunitytoESD.ThisInternationalStandardisapplicabletoalltypesofroadvehicles,regardlessofthevehiclepropulsionsystem(e.g.spark-ignitionengine,dieselengine,electricmotor).4Testequipment4.1GeneralTestequipmentusedtoverifytherequirementsofthedeviceundertestshallnotbesensitivetoESD.ThefollowingtestequipmentisapplicabletoalltestproceduresspecifiedinthisInternationalStandard,includingthoseofannexA.4.2ESDsimulatorTheESDsimulatorshallhavethefollowingcharacteristics.a)Voltagerange:variablefrom−25kVto+25kV.b)Capacitance:330pF±10%,150pF±10%(twoprobes).c)Resistance:2000Ω±10%.d)Risetime:1)directcontact,0,7nsto1ns(ata2Ωload);2)airdischarge,u5ns(ata2Ωload);3)tipshapes(seeFigure2),inaccordancewithIEC61000-4-2.Thesimulatorshallbedesignedsothatthedischargecapacitanceisfullychargedtothedesiredvoltagebeforetheenergyisswitchedtothedeviceundertest.TheconstructionoftheESDsimulatorshallbesuchthatthehigh-voltagegroundandthechassisgroundareelectricallyisolatedfromoneanother.Simulatorequipmentusedshallbeofatypethatiscommerciallyavailable.4.3GroundplaneAgroundplaneisametallicsheet(copper,brass,etc.3))thatshallhaveaminimumthicknessof1mmandanareaofatleast1m2,ensuringthatitprojectsbeyondthedeviceundertestbyatleast100mmonallsides.Thegroundplaneshallbeconnectedtothefacilitygroundbyagroundstraplessthan2mlongandatleast50mmwide.4.4InsulationblocksInsulationblocks,ifused,shallbeconstructedofclean,non-hygroscopicmaterial.Theblocksshallbe(25±2,5)mminheightandprojectbeyondthedeviceundertestbyatleast20mmonallsides.4.5CoaxialtargetAcoaxialtargetasspecifiedinIEC61000-4-2:1995shallbeusedduringtheESDsimulatorverificationgiveninannexA.4.6WidebandattenuatorIfneeded,a50Ω,20dBwidebandattenuatoristobeattachedtotheoutputofthecoaxialtargetduringtheESDsimulatorverificationgiveninannexA.[图片]500){this.resized=true;this.width=500;this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/55/1402091184890422.jpg');}"onmousewheel="returnimgzoom(this);">