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1、数控机床中电压异常引起的故障（FaultscausedbyabnormalvoltageinCNCmachinetools）FaultscausedbyabnormalvoltageinCNCmachinetoolsAbstractCNC(NCmachinetool)istheabbreviationofComputernumbercontrolmachinetool.Itisakindofautomaticmachinetoolwithprogramcontrolsystem.Thecontrolsystemcanlogicall
2、yprocessprogramsthathavecontrol,coding,orothersymbolicinstructions,anddecodethemsothatthemachinemovesandprocessesparts.Therefore,CNCmachinetoolisahighlyintegratedmechanicalandelectricalproducts,thefaultcausedbyabnormalvoltageisverycommon.ThepowersupplyofCNCmachinetools
3、isclassifiedaccordingtothevoltagelevelandderivativerelation.Thecomponentsusedinthepowercircuitareintroduced.Thefaultcausedbytheabnormalvoltageisexplainedwithspecificmaintenanceexamples.1OverviewCNCmachineisahigh-techmechatronicproduct,relatestothemachine,electricity,li
4、quidandgaswiththecomputerautomaticcontrolandmanyotheraspects,especiallytheCNCsystem,PLCprogrammabledeviceanddrivesystemoftheelectronichardwareandsoftware.Therefore,itisverysensitivetotheimpulsesignalgeneratedbythesuddeninterruptionofpowergridorafterthepowerloss,andwill
5、causecertainharmtothesystem.Becauseitisamistaketogiveacommandsystem,makethesystemmalfunction,issuedthe"emergencystop"signalaccordingtotheCNCmachinemaintenanceexperiencethatintotalfaults,thefaultcausedbypoweraccountedforaconsiderableproportion.CNCmachinetoolpowerfailure
6、,alotofmachineusershavetheabilitytoexcludethefailureofthedevice,itsfieldhasbeenapieceofrepair.2CNCmachinetoolpowersupplyItiswellknownthatthepowersupplyistheenergysupportpartthatmaintainsthenormaloperationofthesystem.Thedirectresultofitsfailureorfailureisthesystemshutdo
7、wnordamagetothewholesystem.Inaddition,partoftheoperationdata,settingdataandprocessingprogramarestoredintheRAMmemory.Afterthesystemispoweredoff,thebackupbatteryorlithiumbatteryismaintainedbythepowersupply.Therefore,timeisrelativelylong,thepowerplugormemorymaycausedatalo
8、ss,thesystemcannotrun.Atthesametime,theNCdeviceisusinga380Vthree-phaseACpowersupply,sothesafetyisalsoanimportantparto
