Umhlinzeki weyunithi ye-frequency converter braking ukukhumbuza ukuthi ngokukhuthazwa nokuthuthukiswa kwe-automation yezimboni, ukusetshenziswa kweziguquli zefrikhwensi kuya ngokuya kusabalala. Ukulawulwa kwesivinini sokuguqulwa kwemvamisa kuye kwaqashelwa njengenye yezindlela zokulawula isivinini ezifanele nethembisayo. Inhloso enkulu yokusebenzisa i-universal frequency converter ukwakha isistimu yokulawula isivinini sokuguqulwa kwemvamisa ukuthuthukisa ukukhiqiza kanye nekhwalithi yomkhiqizo; Okwesibili okonga amandla nokunciphisa izindleko zokukhiqiza. Kule nqubo, amakhono okusebenzisa iziguquli zemvamisa abaluleke kakhulu.
Izintambo ezivikelekile kufanele zisetshenziselwe isignali kanye nemigqa yokulawula ukuvimbela ukuphazamiseka. Uma umugqa umfushane, njengalapho ibanga ligxuma ngamamitha ayi-100, indawo enqamula ingxenye yocingo kufanele inwetshwe. Izintambo zesiginali nokulawula akufanele zibekwe endaweni efanayo yekhebula noma ibhuloho njengezintambo zikagesi ukuze kugwenywe ukugxambukela. Kungcono ukuwabeka emiseleni ukuze afaneleke kangcono.
02 Amasignali okudlulisa asekelwe ikakhulukazi kumasignali amanje, njengoba amasignali amanje awancishiswa kalula noma aphazamiseke. Kuzinhlelo zokusebenza ezingokoqobo, ukuphuma kwesiginali ngezinzwa kuyisignali ye-voltage, engaguqulwa ibe isignali yamanje ngesiguquli.
03 Isiguquli sefrikhwensi yokulawula iluphu evaliwe ngokuvamile sihle, 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 ne-PID yesiguquli se-frequency engu-05 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. 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 zingakhethwa ngokuya ngohlobo, inani lamaphuzu, ubuningi bedijithali, ubuningi be-analog, ukucubungula isignali nezinye izidingo zenani lokulawula.
Isiguquli sesignali esingu-06 siphinde sisetshenziswe kaningi kumasekhethi 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.
Uma usebenzisa i-07 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 eyunithi esenziwe ngomumo;
(3) Khetha ilogo yesilawuli ehlelekayo elula;
(4) Uma usebenzisa imisebenzi ehlukene yesiguquli sefrikhwensi, amakhadi okusebenza angakhethwa;
(5) Khetha izilawuli ezihlelekayo ezincane nezimaphakathi.
Kunezinhlelo ezimbili ezivamile zokuguqula ubuchwepheshe bokuguqula imvamisa yokuphakelwa kwamanzi ahambisanayo kanye nengcindezi engaguquki enamaphampu amanzi amaningi (njengamaphampu amanzi ahlanzekile ezitshalweni zamanzi zasemadolobheni, iziteshi zamaphampu amanzi aphakathi nendawo nezinkulu, iziteshi zesikhungo sokuphakela amanzi ashisayo, njll.):
(1) Londoloza utshalomali lokuqala, kodwa umphumela wokonga amandla mubi. Uma uqala, qala uqale isiguquli sefrikhwensi siye ku-50 Hz, bese uqala imvamisa yamandla, bese ushintshela kulawulo lokonga amandla. Ohlelweni lokuhlinzeka ngamanzi, iphampu yamanzi kuphela eshayelwa isiguquli semvamisa enomfutho ophansi kancane, futhi kuba nesiphithiphithi nokulahlekelwa ohlelweni.
(2) Ukutshalwa kwezimali kukhulu uma kuqhathaniswa, kodwa konga amandla angu-20% ngaphezu koHlelo (1). Ukucindezela kwepompo ye-Yuantai kuyavumelana, akukho ukulahlekelwa kwesiphithiphithi, futhi umphumela ungcono.
Lapho amaphampu amanzi amaningi exhunywe ngokufana ukuze anikeze amanzi ngomfutho njalo, indlela yokuxhuma yochungechunge lwesignali isetshenziswa ngenzwa eyodwa kuphela, enezinzuzo ezilandelayo:
(1) Yonga izindleko. Isethi eyodwa nje yezinzwa ne-PID.
(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) Okuhle nakakhulu ukuthi ngenxa yokuthi uhlelo lunesignali eyodwa kuphela yokulawula, ngisho noma amaphampu amathathu afakwe okokufaka okuhlukene, imvamisa yokusebenza iyafana (okungukuthi ivumelanisiwe) futhi ingcindezi nayo iyafana, ngakho ukulahlekelwa kwesiphithiphithi kunguziro, okungukuthi, ukulahlekelwa kuncishisiwe, ngakho umphumela wokonga amandla ungcono kakhulu.
Ukunciphisa imvamisa yesisekelo kuyindlela ephumelela kakhulu yokwandisa i-torque yokuqala
Lokhu kungenxa yokwanda okuphawulekayo kokuqala kwe-torque, ngakho-ke okunye okunzima ukuqalisa imishini efana nama-extruder, imishini yokuhlanza, okomisa ama-spin, izixube, imishini yokumboza, izixube, izifeni ezinkulu, amaphampu amanzi, ama-Roots blowers, njll. konke kungaqalwa kahle. Lokhu kusebenza kangcono kunokujwayelekile ukukhulisa imvamisa yokuqala yokuqala. Ngokusebenzisa le ndlela futhi uyihlanganise nezinyathelo zokushintsha kusukela emthwalweni osindayo ukuya ekulayisheni okulula, ukuvikelwa kwamanje kunganyuswa kuze kube senani eliphakeme, futhi cishe yonke imishini ingaqalwa. Ngakho-ke, ukunciphisa imvamisa yesisekelo ukwandisa i-torque yokuqala kuyindlela ephumelelayo futhi elula.
Uma usebenzisa lesi simo, imvamisa yesisekelo akudingekile ukuthi yehle ibe ngu-30 Hz. Ingehliswa kancane kancane njalo ngo-5 Hz, inqobo nje uma imvamisa okufinyelelwa kuyo ukuncipha ingaqala isistimu.
Umkhawulo ophansi wefrikhwensi yesisekelo akufanele ube ngaphansi kuka-30 Hz. Ngokombono we-torque, umkhawulo ophansi ophansi, i-torque enkulu. Kodwa-ke, kufanele futhi kucatshangelwe ukuthi i-IGBT ingase yonakaliswe lapho i-voltage ikhuphuka ngokushesha kakhulu futhi i-du/dt eguqukayo inkulu kakhulu. Umphumela wangempela wokusetshenziswa ukuthi lesi silinganiso sokukhulisa ithoshi singasetshenziswa ngokuphepha nangokuzethemba lapho imvamisa yehla isuka ku-50 Hz iye ku-30 Hz.
Abanye abantu bakhathazekile ngokuthi, isibonelo, lapho imvamisa yesisekelo yehliselwa ku-30 Hz, i-voltage isivele ifinyelele ku-380 V. Ngakho-ke, lapho ukusebenza okuvamile kungase kudinge ukufinyelela ku-50 Hz, ingabe i-voltage ephumayo kufanele igxumele ku-380 V ukuze injini ingakwazi ukumelana nayo? Impendulo iwukuthi ngeke kwenzeke into enjalo.
Abanye abantu bakhathazekile ngokuthi uma i-voltage ifinyelela ku-380 V uma imvamisa yesisekelo yehla ifika ku-30 Hz, ukusebenza okuvamile kungase kudinge imvamisa yokuphuma engu-50 Hz ukuze kufinyelelwe imvamisa elinganiselwe engu-50 Hz. Impendulo iwukuthi imvamisa yokuphuma ingafinyelela ku-50 Hz.
Ubudlelwano phakathi kwengcindezi eguquguqukayo, ingcindezi emile, kanye nomfutho ophelele bumi kanje:
Ingcindezi enganyakazi ingcindezi (ikhanda) edingekayo ekuphumeni kwephampu yamanzi kuze kufike endaweni ephakeme kakhulu, ngokuvamile i-1 kg yokucindezela kwamanzi ngamamitha angu-10 ekholomu yamanzi.
I-Dynamic pressure ukwehla komfutho okubangelwa umehluko wejubane lokugeleza phakathi koketshezi nodonga lwamapayipi, amavalvu (amavalvu alawulayo, amavalvu abuyayo, amavalvu anciphisa umfutho, njll.), kanye nezingqimba ezihlukene zesigaba esifanayo phakathi nenqubo yokugeleza kwamanzi. Le ngxenye inzima ukubala, futhi ngokusekelwe kokuhlangenwe nakho kwangempela, ingcindezi eguquguqukayo ithathwa njengenani le-20% (eliphezulu) lokucindezela okumile.
Ingqikithi yokucindezela=(i-static pressure+dynamic pressure)=1.2 i-static pressure.
Imvamisa yomkhawulo ophansi wepompo yamanzi kufanele isethwe cishe ku-30 Hz, ngaphandle kwalokho kulula ukukhipha amanzi epayipini elivaliwe. Ngenxa yobuningi bomoya oncibilikisiwe emanzini, lapho ipompo yamanzi iqalwa, kulula ukukhiqiza igumbi lomoya, elibeka ingozi yokucindezela okukhulu.
Ukwethulwa kwamaphoyinti esipiliyoni angu-12 namanani ezomnotho kungokulandelayo:
Ukusetshenziswa kweziguquli zefrikhwensi kuyenzeka kumadivayisi ahlukahlukene ukuze kuzuzwe ukonga amandla, okuqinisekiswe amacala amaningi asebenzayo aphumelelayo.
Ivelu yokuhlangenwe nakho kwayonga kakhulu futhi inezinga eliphezulu lomcebo, hhayi ukonga kakhulu, futhi inamandla okuthi ithathwe. Uma usebenzisa amanani okuhlangenwe nakho, kufanele ahlelwe ngokuvumelana nezimo zangempela zesayithi, futhi kufanele kube nezinguquko ezithile kumingcele yokusebenza, nesimo somkhawulo esiphansi ukuthi akuthinti ukusetshenziswa okuvamile. Lokhu kuyisidingo sokuqala sokuzuza ukongiwa kwamandla.
Inani lezomnotho lisekelwe kumgomo wokuhlangabezana nezimo zomkhawulo ophansi wesistimu, ukwehlisa ngokumaphakathi inani lokuhlola, nokuhlola amandla okuzuza imiphumela yokonga amandla. Uma imingcele yokusebenza ihlala ingashintshile, ukongiwa kwamandla kungafinyelelwa kanjani? Ngaphezu kwalokho, i-frequency converter ngokwayo ayiyona idivayisi ekhiqiza amandla (ijeneretha, ibhethri, amandla elanga), futhi ukusebenza kahle kwayo kuphezulu kakhulu, kusukela ku-97% kuya ku-98%, kodwa kusekhona ukulahlekelwa kwe-2% kuya ku-3%.