I i-inverter yombane ophezulu yi-AC-DC-AC yomthombo wamandla ombane oguquguqulayo kunye nesakhiwo seeyunithi ezininzi.Iqaphela i-sinusoidal waveform yegalelo, i-voltage ephumayo kunye nekhoyo ngoku ngokusebenzisa itekhnoloji ephezulu ye-superposition, ilawula ngokufanelekileyo i-harmonics, kwaye inciphisa ungcoliseko kwigridi yamandla kunye nomthwalo.Kwangaxeshanye, inezixhobo zokukhusela ezipheleleyo kunye nemilinganiselo yokukhuselaisiguquli rhoqo kunye nomthwalo, ukwenzela ukuphelisa kunye nokuphepha ilahleko ebangelwa iimeko ezahlukeneyo ezinzima, kunye nokudala inzuzo enkulu kubasebenzisi.
2. Ukhuseleko lwei-inverter yombane ophezulu
2.1 Ukhuseleko lomgca ongenayo we-inverter yamandla aphezulu
Ukukhuselwa komgca ongenayo kukukhusela umgca wokuphela komsebenzisi ongenayo kunyeisiguquli rhoqo, kubandakanywa ukukhuselwa kombane, ukukhuselwa komhlaba, ukukhuselwa kokulahleka kwesigaba, ukukhuselwa kwesigaba sokubuyisela, ukukhuselwa kokungalingani, ukukhuselwa kwe-overvoltage, ukukhuselwa kwe-transformer kunye nokunye.Ezi zixhobo zokukhusela zifakwe ngokubanzi kwi-input end of inverter, ngaphambi kokuba usebenze i-inverter kufuneka uqale uqinisekise ukuba akukho ngxaki ekukhuselweni komgca ngaphambi kokuba usebenze.
2.1.1 Ukukhuselwa kombane luhlobo lokukhusela umbane ngokubanjwa okufakwe kwikhabhinethi ye-bypass okanye ekupheleni kokufakwa kwe-inverter.Umbambeli sisixhobo sombane esinokukhulula umbane okanye sikhulule amandla ombane ogqithisiweyo womsebenzi wenkqubo yamandla, sikhusele izixhobo zombane kwingozi yokugqithisa ngokukhawuleza, kwaye sinqumle umsinga oqhubekayo ukuphepha inkqubo yokumisa isiphaluka esifutshane.Umbambeli uqhagamshelwe phakathi komgca wokungeniswa kwe-inverter kunye nomhlaba, kwaye udibene ngokuhambelana ne-inverter ekhuselweyo.Xa ixabiso le-overvoltage lifikelela kwi-voltage yokusebenza echaziweyo, umbambeli usebenza ngokukhawuleza, utyhutyha umrhumo, unqande i-amplitude overvoltage, kwaye ukhusela ukugquma kwezixhobo;Emva kokuba i-voltage iqhelekile, umbambisi ubuyisela ngokukhawuleza kwisimo sawo sokuqala ukuqinisekisa ukusebenza okuqhelekileyo kwenkqubo kunye nokuthintela umonakalo ngenxa yokubetha kombane.
2.1.2 Ukukhuselwa komhlaba kukufaka i-zero-sequence transformer device kwi-inlet end of inverter.Umgaqo wokukhusela ngoku ulandelelwano lwe-zero lusekelwe kumthetho wangoku we-Kirchhoff, kunye ne-algebraic sum of current complex flowing kuyo nayiphi na i-node yesekethe ilingana no-zero.Xa umgca kunye nezixhobo zombane ziqhelekileyo, isamba se-vector yangoku kwisigaba ngasinye silingana ne-zero, ngoko ke i-second winding ye-zero-sequence current transformer ayinayo i-signal output, kwaye i-actuator ayisebenzi.Xa kusenzeka impazamo ethile yomhlaba, isixa se-vector yesigaba ngasinye sangoku asiyiyo i-zero, kwaye impazamo yangoku ivelisa i-magnetic flux kumbindi we-zero-sequence current transformer, kunye nokungeniswa kombane wesibini we-zero-sequence current transformer is idluliselwe kwibhokisi ephambili yokubeka iliso, kwaye emva koko umyalelo wokukhusela ukhutshwe ukuze kuphunyezwe injongo yokukhusela impazamo yomhlaba.
2.1.3 Ukunqongophala kwesigaba, isigaba sokubuyela umva, ukhuseleko olungalinganiyo, ukukhuselwa kombane ogqithisileyo.Ukunqongophala kwesigaba, isigaba sokubuyela umva, ukukhuselwa kwesidanga esingalungelelananga, ukukhuselwa kwe-overvoltage ikakhulu yinguqulelo yengxelo yombane we-inverter okanye i-voltage transformer yokufumana umbane wombane, kwaye emva koko ngebhodi ye-CPU ukugqiba ukuba ngaba kukusilela kwesigaba, isigaba sokubuyela umva, igalelo. ibhalansi ye-voltage, nokuba i-overvoltage, kuba ukuba isigaba segalelo, okanye isigaba sokubuyisela umva, kunye nokungalingani kwe-voltage okanye i-overvoltage kulula ukubangela ukuba i-transformer itshise.Okanye iyunithi yamandla yonakele, okanye i-motor iguqulwe.
2.1.4 Ukhuseleko lweTransformer.Ii-inverter yombane ophezulu iqulunqwe ngamacandelo amathathu kuphela: iKhabhinethi Transformer, iyunithi yekhabhathi amandla, ulawulo lwekhabhathi ukubunjwa, isiguquli kukusetyenziswa tangential owomileyo uhlobo isiguquli ukuguqula eliphezulu-voltage alternating yangoku kuthotho engile ezahlukeneyo ombane ophantsi unikezelo lwamandla ombane iyunithi amandla, i-transformer inokupholiswa kuphela ngokupholisa umoya, ngoko ukukhuselwa kwe-transformer ikakhulu ngokukhuselwa kobushushu be-transformer, ukuthintela ubushushu be-transformer buphezulu kakhulu, kwaye kubangele i-coil ye-transformer itshiswe.Iprobe yeqondo lokushisa ifakwe kwi-coil yesigaba sesithathu se-transformer, kwaye enye isiphelo seprobe yeqondo lokushisa ixhunyiwe kwisixhobo sokulawula ubushushu.Isixhobo sokulawula ubushushu sinokuseta ubushushu bokuqalisa ngokuzenzekelayo kwefeni ezantsi kwe-transformer, iqondo lobushushu le-alarm, kunye nobushushu bohambo.Ngexesha elifanayo, ukushisa kwekhoyili yesigaba ngasinye kuboniswa ngamaxesha amaninzi.Ulwazi lwe-alamu luya kuboniswa kwi-interface yomsebenzisi, kwaye i-PLC iya kwenza i-alamu okanye ikhuselwe uhambo.
2.2 Ukhuseleko olusecaleni lwe-inverter yombane ophezulu
Ukhuseleko lomgca wesiphumoi-inverter yombane ophezulu lukhuselo lwecala lemveliso ye-inverter kunye nomthwalo, kubandakanywa ukhuseleko lwe-overvoltage yemveliso, ukhuseleko lwe-overcurrent, imveliso yokukhusela isiphaluka esifutshane, ukukhuselwa kwe-motor overtemperature njalo njalo.
2.2.1 Ukhuseleko lokugqithiswa kwamandla.Ukukhuselwa kwe-overvoltage ye-output iqokelela i-voltage ephumayo ngebhodi yesampula ye-voltage kwicala lokuphuma.Ukuba i-voltage ephumayo iphezulu kakhulu, inkqubo iya kwenza i-alamu ngokuzenzekelayo.
2.2.2 Iziphumo zoKhuseleko lwaNgaphandle.Ukukhuselwa okugqithisiweyo kwemveliso kuchonga imveliso yangoku eqokelelwe yiHolo kwaye ithelekise ukugqiba ukuba ingaba ibangela ukugqithisa.
2.2.3 Isiphumo soKhuselo lweSetyhula emfutshane.Amanyathelo okukhusela impazamo yesiphaluka esifutshane phakathi kwe-stator windings kunye neengcingo ezihamba phambili zemoto.Ukuba i-inverter inquma ukuba imveliso yisekethe emfutshane, ivala ngokukhawuleza iyunithi yamandla kwaye iyeke ukusebenza.
Ixesha lokuposa: Jul-28-2023