Abahlinzeki beyunithi yempendulo bayakukhumbuza: Yimaphi ama-peripheral ama-frequency converter anawo? Iyini inhloso ngayinye?
(1) Isiguquli samandla esingu-T sisetshenziselwa ukuguqula i-voltage yamandla ibe ileveli kagesi edingwa isiguquli sefrikhwensi evamile. I-current input of the frequency converter iqukethe inani elithile le-harmonic ephezulu, ukuze isici samandla ohlangothini lwamandla sincishiswe. Uma ukusebenza kahle kwe-converter frequency kucatshangelwa, umthamo we-transformer uvame ukubalwa ngale ndlela elandelayo:
I-T—Isiguquli samandla QF—Isihlukanisi sesekethe samandla e-KM1—Isixhumi samandla kagesi ohlangothini lwamandla FIL—Isihlungi somsindo womsakazo UL1—Isimelana samandla se-AC R—I-Brake resistor KM2—Isixhumi esixhumene nogesi esiseceleni kweMotor KM3—Othintana naye ngokushintsha igridi ye-UL2—Isixhasi se-AC se-Motor side
Phakathi kwazo, lapho kukhona okokufaka kwe-AC resistor UL1, isici samandla se-converter frequency ngu-0.8 kuya ku-0.85; Uma kungekho okokufaka kwe-AC resistor UL1, isici samandla se-inverter singu-0.6 ~ 0.8. Ukusebenza kahle kwe-inverter kungaba ngu-0.95, amandla okukhiphayo we-inverter kufanele abe amandla aphelele emoto exhunyiwe.
(2) Isiphazamisi sesekethe esiseceleni samandla i-QF sisetshenziselwa ukuphazamisa isekethe yamandla, futhi sinqamule ugesi ngokuzenzakalelayo lapho kuba nengozi yamanje noma emfishane, ukuze kuvinjwe ingozi ekukhuleni. Uma kudingeka ukuvikela okuphansi, i-breaker circuit yokuvikela ukuvuza nayo ingasetshenziswa.
(3) I-electromagnetic contactor KM1 isetshenziselwa ukuphazamisa ukunikezwa kwamandla, ukunqamula ukunikezwa kwamandla lapho umsebenzi wokuvikela inverter usebenza. Ukuze kutholakale amandla ngemva kokunqamuka kukagesi, kungavimbela ukufakwa kabusha okuzenzakalelayo ukuze kuvikelwe ukuphepha kwezinto zokusebenza nokuphepha komuntu siqu.
(4) Isihlungi somsindo womsakazo i-FIL sisetshenziselwa ukukhawulela isiguquli semvamisa ngenxa yokuphazamiseka okuphezulu kwe-harmonic nezwe langaphandle, singasetshenziswa ngokufanelekile.
(5) I-AC resistor UL1 isetshenziselwa ukucindezela i-harmonic current ohlangothini lokufakwayo lwesiguquli ukuze kuthuthukiswe isici samandla. Ukukhethwa nokwenqatshwa kwesimo esifanayo se-transformer yamandla kanye nomthamo we-inverter kanye nezinga lokuhlanekezela elivunyelwe i-voltage yegridi. Ngokuvamile, kungcono ukusebenzisa.
(6) I-AC resistor UL2 isetshenziselwa ukuthuthukisa i-waveform yokukhishwa kwamanje kwesiguquli semvamisa nokunciphisa umsindo wemoto kagesi.
(7) Ukumelana namabhuleki R kusetshenziselwa ukumunca amandla kagesi avuselelwayo ebhuleki elivuselelayo lemoto (eyaziwa nangokuthi ibhuleki lempendulo), okungafinyeza isikhathi sokupaka samahhala somthwalo omkhulu ongenayo. Ngaphezu kwalokho, i-regenerative braking ingafinyelelwa lapho i-bit load ikhishwa.
(8) I-electromagnetic contactor KM2 ne-KM3 isetshenziselwa ukushintsha ukusebenza phakathi kwesiguquli kanye negridi yamandla. Ngale ndlela, i-KM2 ibalulekile, futhi ukuhlangana phakathi kwayo ne-KM3 kungavimbela ukuphuma kwe-inverter ekuxhumekeni kugridi yamandla.