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《维修电磁炉必看（maintenance of electromagnetic oven must be seen）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、维修电磁炉必看（Maintenanceofelectromagneticovenmustbeseen）CausesoftubeburningininductioncookerAftertheexplosionoftheelectromagnetictube25N120,allthesuspiciouscomponentswerechecked,allthecomponentswerereplaced,andtheimportantpremisebeforethetestwasstarted:1,adjustthepoweradjustmentresistortothemiddle!2
2、,thefirstuseof1insuranceinsteadoftheoriginalburned10insurance!(plushcopperwire)preventelectricbreakdowntubeinstantly!3,donotputtheboilerboot!Viewingphenomenon!Asnormal!Insuranceisnotbrokenwell!Putthepottoseethecurrent,lowfire4Amediumfire5Ahighfire7Acurrentistoolarge,pleasepoweroff,adjustthepowe
3、rpotentiometer.SohowbigistheAnumberoffuses?Answer:themostidealnumberofusersinuseis3-5A,withoutanydamagetothepowertube.!Ifthepowersupplyis1,thefusewillfuse!Pleasechecksuspiciouscomponentsagain!.Restassuredthatyour25N120isnotbad!Learnhowtodoit,whatdoyoufearwhenyou'reworkingonanelectromagneticcook
4、er?EightreasonsforIGBTtubeburninginelectromagneticstove[1]0,3UF/1200V,5UF/400Vresonantcapacitorfiltercapacitorcapacitybecomessmall,failureorbad,willleadtotheelectromagneticovenLCresonantcircuitfrequencychange,ifwefindtwocapacitorshaveabadtogethertoreplacetheOK.[2]IGBTexcitationcircuitduetoabnor
5、malpulseoutputoftheoscillationcircuit,notdirectlycontroltheIGBTsaturation,onandoff,mustpassthroughthedrivecircuitamplifiesthepulsesignaltocomplete,iftheexcitationcircuitfailure,highvoltagewillbemarriedtoIGBTpipe,IGBTpipeleadstoinstantaneousbreakdown.[3]synchronouscircuitisabnormal,theroleofsync
6、hronouscircuitistoaddtotheIGBTtubeswitchpulsefrontandIGBTtubeontheVCEpulseafterextensionsynchronization,ifthiscircuitisabnormal,willburnIGBTtube.[4]18Vvoltageanomaly,ifthispointisabnormal,itwillcausetheelectromagneticfurnacepowerimmediatelyburningIGBTtube[5]poorheatdissipationsystem,electromagn
7、eticfurnaceworkinginahighcurrentstate,itscalorificvalueisalsolarge,ifthepoorheatdissipationcircuitwillleadtoIGBTtubeburnout.[6]singlechipmicrocomputerabnormal,iftheMCUinternalbad,willworkfrequencyoffsetandburnedIGBTtube.[7]VCEdete
