Abahlinzeki bemishini esekela i-frequency converter bakukhumbuza ukuthi ukukhetha umshini osekelayo wokuguqula imvamisa kungaqinisekisa ukusebenza okuvamile kwesistimu yokushayela i-frequency converter, kunikeze ukuvikelwa kwesiguquli semvamisa 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.
(1) Ukukhethwa kwezisekeli ezijwayelekile.
Ngenxa yokuthi isiqalo samanje se-motor ohlelweni lokulawula isivinini se-frequency converter singalawulwa ngaphakathi kwebanga elincane, umthamo wamanje olinganiselwe we-power side circuit breaker ungakhethwa ngokuya ngesilinganiso samanje se-converter frequency.
Indlela yokukhetha yama-contactors iyafana naleyo yama-circuit breaker. Ukunakwa kufanele kukhokhwe lapho usebenzisa: Ungasebenzisi izixhumi ze-AC ukuqala noma ukumisa njalo (impilo evulekile/yokuvaleka yesekethe yokufaka inverter cishe izikhathi eziyi-100000): Ungasebenzisi izixhumi ze-AC ohlangothini lwamandla ukuze umise isiguquli.
Kukhona i-static capacitance yokuya phansi ngaphakathi kwesiguquli sefrikhwensi, injini, nemikhondo yokufaka/yokukhiphayo, futhi imvamisa yenkampani yenethiwekhi esetshenziswa isiguquli sefrikhwensi iphezulu uma kuqhathaniswa. Ngakho-ke, ukuvuza kwamanje kuya emhlabathini kwesiguquli sefrikhwensi kukhulu, futhi ngezinye izikhathi kungase kubangele ngisho nesifunda sokuvikela ukuthi singasebenzi kahle. Lapho usebenzisa isivikelo sokuvuza, amaphuzu amabili alandelayo kufanele aqashelwe:
Enye iwukuthi umvikeli wokuvuza kufanele abekwe ohlangothini olufakiwe lwe-converter frequency, ngemuva kwe-breaker circuit;
Okwesibili ukuthi ukusebenza kwamanje kwesivikeli sokuvuza kufanele kube kukhulu kunezikhathi ezingu-10 zamanje zokuvuza kolayini lapho isiguquli semvamisa singasetshenziswa ngaphansi kokunikezwa kwamandla.
(2) Ukukhethwa kwezisekeli ezikhethekile.
Ukukhethwa kwezesekeli eziyisipesheli kufanele kusekelwe ezindinganisweni zemanuwali yomsebenzisi yesiguquli sefrikhwensi ehlinzekwe ngumkhiqizi wesiguquli, futhi akufanele kukhethwe ngobumpumputhe.
Iyunithi yokubhuleka, eyaziwa nangokuthi "iyunithi ye-braking yokusetshenziswa kwe-frequency converter ethize" noma "iyunithi yempendulo ye-frequency converter ethize yamandla", isetshenziswa kakhulu ukulawula izimo ezinemithwalo esindayo yemishini kanye nezidingo zejubane lokubhuleka ngokushesha. Isebenzisa amandla kagesi avuselelwe akhiqizwe injini ngesixhasi sokubhuleka noma ibuyisela amandla kagesi avuselelwe esiphakeleni sikagesi.
Futhi amadivayisi wempendulo yamandla abe yinketho edumile kumishini esekela isiguquli semvamisa ngokusetshenziswa kwezinqubomgomo zokonga nokunciphisa ukusetshenziswa. Idivayisi yempendulo yamandla iyidivayisi esebenzisa amandla emishini (amandla angaba khona, amandla e-kinetic) emthwalweni onyakazayo ukuze iguqulwe ibe amandla kagesi ngenjini, bese iguqulwa ibe amandla ashintshanayo ngesiguquli, isilungisi, nesekhethi yokuhlunga. Ngakho-ke, amadivaysi empendulo yamandla afakwe kuzinto zamandla aphezulu (ama-cranes, ama-hoists, ama-centrifuge, namayunithi okumpompa) ngaphakathi kwesistimu lapho amandla anamandla kanye ne-kinetic evame ukushintsha. Ingakwazi ukubuyisela ngempumelelo amandla kagesi avuselelwe enjini kugridi yamandla kagesi ye-AC ukuze isetshenziswe ezinye izisetshenziswa zikagesi ezizungezile, nomthelela obalulekile wokonga amandla. Izinga elijwayelekile lokonga amandla lingafinyelela ku-20% kuya ku-50%.