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What is the static test and dynamic test of the inverter detection method?

What is the static test and dynamic test of the inverter detection method?

Abstract:
First,statictest SetthemultimetertotheresistanceX10level,connectthemultimeter'sredmetersticktothePterminaloftheDCpowersupplyinsidetheinverter,andthenconnecttheblackmetersticktoR,S,Trespectively.Theresistancevalueshouldbeabouttensofohms.WhentheblackwatchrodisconnectedtotheendandtheredwatchrodisconnectedtoR,S,Tinorder,therewillbearesistancevalueclosetoinfinity.Connectthemultimeter'sredmetersticktotheNterminaloftheDCpowersupplyinsidetheinverterandrepeattheabovesteps.Iftheresultisthesameasabove,itmeansthatthestatictestisnormal.Ifthethree-phaseresistanceisunbalanced,itcanindicatethattherectifierbridgeisfaulty.WhentheredwatchrodisconnectedtothePterminal,theresistanceisinfinite,anditcanbeconcludedthattherectifierbridgeisfaultyorthestartingresistanceisfaulty.  Two,dynamictest 动态Thedynamictestcanbeperformedafterthestatictest.Beforepower-on,youmustconfirmwhethertheinputvoltageiscorrect.Ifyouconnectthe380Vpowersupplytothe220V-classinverter,therewillbeexplosives(explosivecapacitors,varistor,modules,etc.).Itisnecessarytocheckwhetherthebroadcastingportsoftheinverterarecorrectlyconnected,whethertheconnectionisloose,andtheabnormalconnectionmaysometimescausetheinvertertomalfunction,andinseverecases,anexplosionwilloccur.Detectthefaultdisplaycontentafterpower-on,andpreliminarilydeterminethefaultanditscause.Ifthefaultisnotdisplayed,firstcheckwhethertheparametersareabnormal,andresettheparameters,thenstarttheinverterwithnoload(withoutmotor),andtestthethree-phaseoutputvoltagevalues​​ofU,V,andW.Ifthereisalackofphaseorthree-phaseimbalance,themoduleordriverboardisfaulty.Whentheoutputvoltageisnormal(nolackofphase,three-phasebalance),loadtestisperformed.Whentesting,itisbesttotestatfullload.
What is a sensor?

What is a sensor?

Abstract:
Asensor(Englishname:transducer/sensor)isadetectiondevicethatcansensetheinformationbeingmeasured,andcantransformthesensedinformationintoelectricalsignalsorotherrequiredformsofinformationoutputinaccordancewithacertainruletomeettheinformationTransmission,processing,storage,display,recordingandcontrolrequirements.Thecharacteristicsofthesensorinclude:miniaturization,digitization,intelligence,multi-function,systemization,andnetwork.Itistheprimarylinktoachieveautomaticdetectionandautomaticcontrol.Theexistenceanddevelopmentofsensorsallowobjectstohavesensessuchastouch,tasteandsmell,andmakeobjectsslowlycometolife.Generallydividedintotencategoriessuchasthermalsensors,lightsensors,gassensors,forcesensors,magneticsensors,humiditysensors,soundsensors,radiationsensors,colorsensors,andtastesensors.