Umphakeli wezinto ezisekelayo zesiguquli sefrikhwensi ukukhumbuza ukuthi isiguquli sefrikhwensi iyithuluzi lokulawula amandla kagesi elisebenzisa umsebenzi wokucisha wamadivaysi esemiconductor yamandla ukuguqula ukunikezwa kwamandla kagesi kwenye ifrikhwensi. Ingakwazi ukufeza ukuqala okuthambile, ukulawulwa kwesivinini sokuguqulwa kwemvamisa, ukuthuthukisa ukunemba kokusebenza, ukushintsha isici samandla, ukuvikelwa kwe-overcurrent/overvoltage/overload kanye neminye imisebenzi yamamotor asynchronous AC. Yini okufanele inakwe lapho usebenzisa i-converter frequency?
1. Izintambo ezivikelekile kufanele zisetshenziselwe isignali kanye nemigqa yokulawula ukuvimbela ukuphazamiseka. Uma umugqa umude, njengokugxuma kwebanga elingu-100m, ingxenye enqamulayo yocingo kufanele inwetshwe. Izintambo zesiginali nokulawula akufanele zibekwe endaweni efanayo yekhebula noma ibhuloho njengezintambo zikagesi ukuze kugwenywe ukugxambukela. Kungcono ukuwabeka emiseleni ukuze afaneleke kangcono.
2. Isignali yokudlulisela isekelwe ikakhulukazi kumasignali amanje, njengoba amasignali amanje awancishiswa kalula noma aphazamiseke. Kuzinhlelo zokusebenza ezingokoqobo, ukuphuma kwesiginali ngezinzwa kuyisignali ye-voltage, engaguqulwa ibe isignali yamanje ngesiguquli.
3. Ukulawulwa kwe-loop evaliwe yeziguquli zefrikhwensi ngokuvamile kuhle, okusho ukuthi isignali yokufaka inkulu futhi okukhiphayo nakho kukhulu (njengaphakathi nomsebenzi wokupholisa ophakathi nendawo nokucindezela okuvamile, ukugeleza, ukulawula izinga lokushisa, njll.). Kodwa kuphinde kube nomphumela ohlanekezelwe, okungukuthi, lapho isignali yokufaka inkulu, okukhiphayo kuba kuncane kakhulu (njengalapho isimo somoya esimaphakathi sisebenza ekushiseni kanye nephampu yamanzi ashisayo yokushisisa esiteshini sokushisisa).
Uma usebenzisa amasignali okucindezela ekulawuleni iluphu evaliwe, ungasebenzisi amasignali agelezayo. Lokhu kungenxa yokuthi izinzwa zesignali yokucindezela zinamanani aphansi, ukufakwa kalula, umthwalo ophansi wokusebenza, kanye nokulungisa iphutha. Kodwa-ke, uma kunezidingo zesilinganiso sokugeleza kunqubo kanye nokunemba okudingekayo, isilawuli sokugeleza kufanele sikhethwe, futhi amamitha okugeleza afanelekile (njengama-electromagnetic, target, vortex, orifice, njll.) kufanele akhethwe ngokusekelwe kungcindezi yangempela, izinga lokugeleza, izinga lokushisa, okuphakathi, isivinini, njll.
Imisebenzi eyakhelwe ngaphakathi ye-PLC kanye ne-PID yesiguquli semvamisa ifanele amasistimu anokushintshashintsha kwesignali okuncane futhi okuzinzile. Kodwa-ke, ngenxa yemisebenzi eyakhelwe ngaphakathi ye-PLC neye-PID elungisa kuphela isikhathi esingaguquki phakathi nokusebenza, kunzima ukuthola izidingo zenqubo yoguquko ezanelisayo, futhi ukulungisa iphutha kudla isikhathi.
Ngaphezu kwalokho, lolu hlobo lokulawula aluhlakaniphile, ngakho ngokuvamile alusetshenziswa njalo. Kunalokho, kukhethwa isilawuli se-PID esihlakaniphile sangaphandle. Isibonelo, uchungechunge lwe-Japanese Fuji PXD kanye ne-Xiamen Antong zilula kakhulu. Uma isetshenziswa, mane usethe i-SV (inani lomkhawulo ongaphezulu), futhi kukhona inkomba ye-PV (inani lokusebenza) phakathi nokusebenza. Ihlakaniphile futhi, iqinisekisa izimo ezinhle kakhulu zenqubo yoshintsho, iyenze ilungele ukusetshenziswa. Mayelana ne-PLC, izinhlobo ezihlukahlukene zama-PLC angaphandle njenge-Siemens S7-400, S7-300, S7-200 zingakhethwa ngokuya ngemvelo, inombolo, ubuningi bedijithali, ubuningi be-analog, ukucubungula isignali nezinye izidingo zenani lokulawula.
Iziguquli zesiginali nazo zisetshenziswa kaningi kumasekethe aseduze weziguquli zefrikhwensi, ngokuvamile ezihlanganisa izakhi zeHholo namasekhethi kagesi. Ngokusho kokuguqulwa kwesignali nezindlela zokucubungula, zingahlukaniswa zibe iziguquli ezihlukahlukene ezifana ne-voltage kuya yamanje, yamanje ku-voltage, i-DC kuya ku-AC, i-AC kuya ku-DC, i-voltage kuya imvamisa, yamanje ukuya kumafrikhwensi, okukodwa kokuphumayo okuningi, okuphumayo okukodwa, ukujula kwesignali, ukuhlukaniswa kwesignali, njll. Isibonelo, uchungechunge lwe-Saint Seil CE-T izinzwa zokuhlukanisa ugesi / ama-transmitter e-Shenzhen alula kakhulu ukusebenzisa. Kunemikhiqizo eminingi efanayo e-China, futhi abasebenzisi bangakhetha izinhlelo zabo zokusebenza ngokuya ngezidingo zabo.
7) Uma usebenzisa i-frequency converter, ngokuvamile kuyadingeka ukuyihlomisa ngamasekhethi azungezile, angenziwa ngezindlela ezilandelayo:
(1) Isifunda esisebenzayo esinengqondo esakhiwe ama-relay azenzele wona kanye nezinye izingxenye zokulawula;
(2) Thenga amasekhethi angaphandle asele enziwe kakade (njengalawo avela kwaMitsubishi Corporation eJapane);
(3) Khetha ilogo yesilawuli ehlelekayo elula (lo mkhiqizo utholakala ngaphakathi nangaphandle);
(4) Uma usebenzisa imisebenzi ehlukene yesiguquli sefrikhwensi, ikhadi lokusebenza lingakhethwa (njenge-Japanese Sanken frequency converter);
(5) Khetha izilawuli ezihlelekayo ezincane nezimaphakathi.
8. Ukukhetha kahle okokusebenza okusekela i-frequency converter kungaqinisekisa ukusebenza okuvamile kwesistimu yokushayela i-frequency converter, kunikeze ukuvikeleka kwesiguquli sefrikhwensi kanye nenjini, futhi kunciphise umthelela kwezinye izinto zokusebenza.
Amadivaysi e-peripheral ngokuvamile abhekisela ezintweni ezisizayo, ezihlukaniswe zibe izesekeli ezivamile nezesekeli ezikhethekile, njengama-circuit breaker kanye nama-contactor, okuyizesekeli ezivamile; Izihlaseli ze-AC, izihlungi, izinqamuleli zamabhuleki, amayunithi okubhuleka, amadivayisi wempendulo yamandla, izihlaseli ze-DC, nama-AC aphumayo yizisekeli ezikhethekile.
Uma amaphampu amanzi amaningi exhunywe ngokuhambisana ukuze anikeze amanzi ngomfutho njalo, indlela yokuxhuma yochungechunge lwesignali isetshenziswa ngenzwa eyodwa kuphela, enezinzuzo ezilandelayo.
(1) Yonga izindleko. Isethi eyodwa nje yezinzwa ne-PID, njengoba kukhonjisiwe kuMfanekiso 4.
(2) Njengoba kunesignali eyodwa kuphela yokulawula, imvamisa yokuphuma iyahambisana, okungukuthi, imvamisa efanayo, ngakho-ke ukucindezela nakho kuyavumelana, futhi akukho ukulahlekelwa kwesiphithiphithi.
(3) Lapho uhlinzeka ngamanzi ngengcindezi eqhubekayo, inani lamaphampu asebenzayo lilawulwa yi-PLC njengoba izinga lokugeleza lishintsha. Okungenani iyunithi elingu-1 liyadingeka, amayunithi angu-2 ayadingeka enanini elimaphakathi, futhi amayunithi angu-3 ayadingeka kumanani amakhulu. Uma isiguquli sefrikhwensi singasebenzi futhi sima, isignali yesifunda (yamanje) isendleleni (kunesignali egelezayo, kodwa ayikho i-voltage ephumayo noma imvamisa).
(4) Okuzuzisa kakhulu ukuthi ngenxa yokuthi uhlelo lunesignali eyodwa kuphela yokulawula, ngisho noma amaphampu amathathu efakwa kokufakwayo okuhlukene, imvamisa yokusebenza iyafana (okungukuthi ivumelanisiwe) nokucindezela kuyafana, ngakho ukulahlekelwa kwesiphithiphithi kunguziro, okusho ukuthi ukulahlekelwa kuncane futhi umphumela wokonga amandla muhle.