Umhlinzeki weyunithi ye-frequency converter braking ukukhumbuza ukuthi izici zokuqala okufanele uzicabangele lapho ukhetha isiguquli sefrikhwensi sihlanganisa: uphawu, amandla, amandla kagesi, amandla kagesi, umthwalo (okungukuthi into esetshenziswa injini), izimo zohlelo. Ukwengeza, kunezinye izesekeli ozikhethela zona okufanele zicatshangelwe uma kukhethwa, njengokuthi ingabe iphaneli yokulawula ithengwa ngokuhlukana, noma ngabe izihlungi, ama-reactor, ama-braking resistors, ama-braking units, njll. Ezinye izisetshenziswa ezichwepheshile kufanele zikhethe iziguquli zefrikhwensi ezizinikele. Isibonelo, emishinini yokubumba umjovo, amakheshi, nezimboni zendwangu, kungcono ukhethe isiguquli esizinikezele sefrikhwensi.
Ukukhethwa kwebhrendi kubalulekile ngokombono webhizinisi nowezobuchwepheshe. Kunamakhulu emikhiqizo emakethe, futhi ngokuvamile, amamodeli weziguquli zefrikhwensi achazwa ngokusekelwe emandleni. Kubalulekile ukuqaphela ukuthi amaphaneli okulawula amabhrendi angenisiwe adinga ukuthengwa ngokuhlukana, futhi intengo yeziguquli zefrikhwensi ayifaki iphaneli yokulawula, kuyilapho iziguquli zamafrikhwensi zasekhaya ngokuvamile zihlanganisa iphaneli yokulawula. Ngokuvamile, amandla emoto ayisisekelo sokukhetha amandla okuguqula imvamisa. Kodwa-ke, kufanele kuqashelwe ukuthi inani lamanje lemoto kufanele lisetshenziswe njengesisekelo sokukhetha isiguquli semvamisa, futhi amandla alinganisiwe wemoto angasetshenziswa kuphela njengereferensi. Izimo zokusetshenziswa kwamafeni namaphampu amanzi anemithwalo ephansi uma kuqhathaniswa, futhi ngokuvamile, abakhiqizi beziguquli zefrikhwensi banochungechunge olukhethekile lweziguquli zefrikhwensi.
Nazi ezinye izimiso zokukhetha:
1. Khetha isiguquli sefrikhwensi ngokusekelwe ezicini zokulayisha.
2. Lapho ukhetha i-converter ye-frequency, inani lamanje le-motor langempela kufanele lisetshenziswe njengesisekelo sokukhetha isiguquli se-frequency, futhi amandla alinganisiwe we-motor angasetshenziswa kuphela njengereferensi. Okwesibili, kufanele kucatshangelwe ngokugcwele ukuthi ukukhishwa kwesiguquli se-frequency kuqukethe ama-harmonics aphezulu, angabangela isici samandla nokusebenza kahle kwe-motor ukuwohloka.
3. Uma isiguquli sefrikhwensi sidinga ukusebenza ngekhebula ende, kufanele sikhuliswe ngegiya elilodwa noma i-reactor ephumayo kufanele ifakwe ekugcineni kokuphumayo kwesiguquli sefrikhwensi.
4. Uma i-frequency converter isetshenziselwa ukulawula amamotho amaningana ngokuhambisana, kuyadingeka ukucabangela ukuthi ubude obuphelele bezintambo ukusuka ku-converter frequency kuya kumamotho kungaphakathi kwebanga elivumelekile lesiguquli semvamisa.
5. Kwezinye izimo zohlelo lokusebenza olukhethekile, ezifana nezinga lokushisa eliphezulu le-ambient, imvamisa yokushintsha kakhulu, ukuphakama okuphezulu, njll., lokhu kungabangela isiguquli sefrikhwensi ukuthi sinciphise umthamo waso, futhi isiguquli semvamisa sidinga ukukhuliswa ileveli eyodwa ukuze kukhethwe.
6. Lapho ukhetha isiguquli semvamisa samamotho anesivinini esikhulu, kufanele sibe sikhulu kancane kunesiguquli semvamisa samamotho ajwayelekile.
7. Uma usebenzisa i-frequency converter ye-variable pole motor, kufanele kuqashelwe ngokugcwele ekukhetheni umthamo wesiguquli sefrikhwensi ukuze isilinganiso saso esiphezulu samanje sibe ngaphansi komphumela wamanje olinganiselwe wesiguquli sefrikhwensi.
8. Uma ushayela amamotho angaqhumisi, isiguquli sefrikhwensi asinazo izakhiwo ezivikela ukuqhuma futhi kufanele zibekwe ngaphandle kwezindawo eziyingozi.
9. Uma usebenzisa isiguquli semvamisa ukushayela injini yokunciphisa igiya, ububanzi bokusetshenziswa bukhawulwa indlela yokugcoba yezingxenye ezijikelezayo zegiya. Ungeqi isivinini esiphezulu esivumelekile.
10. Uma usebenzisa i-converter ye-frequency ukushayela i-rotor yesilonda e-asynchronous motor, iningi lamamotho akhona asetshenziswa. Kulula ukubangela ukukhubeka kwe-overcurrent ngenxa ye-ripple current, ngakho-ke isiguquli sefrikhwensi esinomthamo omkhulu kunokuvamile kufanele sikhethwe.
11. Uma ushayela i-synchronous motor ene-converter frequency, umthamo wokukhiphayo wehliswa ngo-10% kuya ku-20% uma uqhathaniswa nomthombo wefrikhwensi yamandla.
12. Ngemithwalo ene-torque enkulu eguquguqukayo njengama-compressor kanye nemishini yokudlidliza, kanye nemithwalo ephakeme kakhulu njengamaphampu we-hydraulic, kuyadingeka ukuqonda ukusebenza kwemvamisa yamandla bese ukhetha isiguquli se-frequency esinomphumela wamanje olinganisiwe omkhulu kunomkhawulo wayo wamanje.
13. Uma usebenzisa i-frequency converter ukuze ulawule i-Roots blower, ngenxa yamanje ephezulu yokuqala, kubalulekile ukunaka ukuthi umthamo we-frequency converter mkhulu ngokwanele uma uyikhetha.
14. Uma ukhetha i-converter frequency, kubalulekile ukunaka ukuthi izinga layo lokuvikela lifana nesimo esikusayithi.
15. Izinjini zesigaba esisodwa azifaneleki i-frequency converter drive. Uma kuphela ukuthembeka okuphezulu komzimba we-inverter kukhona, kodwa ukukhethwa kanye nokulinganisa umthamo we-inverter akufanelekile, futhi uhlelo lokulawula isivinini esishintshashintshayo olubangelwa ukuguquguquka alukwazi ukufeza ukwethembeka okuphezulu noma ngisho nokusebenza, singaqinisekisa kanjani ukusebenza okuvamile nokusebenza kahle kwesistimu yokuguquguquka kwemvamisa? Kudingeka siqinisekise ukuthi umthamo wesiguquli sefrikhwensi uyahambisana. Okokuqala, khetha uhlobo olufanele lwesiguquli semvamisa ngokusekelwe kumvelo yomthwalo.
Umgomo ojwayelekile uwukufanisa uhlobo lwezimpawu zomthwalo nezici zesiguquli semvamisa.
(1) Izinto ezisetshenziswa njalo zokukhiqiza ithoshi - Phakathi kwebanga lesivinini, ithoshi yomthwalo ihlala injalo ngokuyisisekelo. Isiguquli se-frequency esisebenza njalo ngetorque kufanele sikhethwe. Umthamo wayo wokulayisha ngokweqile ugcinwa ku-150% wamanje olinganiselwe umzuzu ongu-1.
(2) Imishini yokukhiqiza ithoshi yesikwele - Phakathi kwebanga lejubane, ithoshi yomthwalo ilingana nesikwele sejubane, okungukuthi, M ∝ n2. Abalandeli be-Centrifugal namaphampu amanzi bangabameleli abajwayelekile balokhu. Isiguquli se-frequency esinezici ze-M ∝ n2 sinomthamo omncane wokugcwala ngokweqile, ngo-110% -120% olinganiselwe njengamanje ulayishwe ngokweqile iminithi elingu-1,
(3) Izinto ezisetshenziswa njalo zokukhiqiza umthwalo wamandla - ngaphakathi kwebanga lejubane, isivinini esiphansi kanye netorque ephezulu; Isivinini esikhulu kanye netorque ephansi, okokusebenza okujwayelekile njengamathuluzi omshini nezindlela zokusonta.