Abahlinzeki bemishini esekela i-frequency converter bakukhumbuza ukuthi ukusetshenziswa okungalungile kweziguquli zefrikhwensi akuhluleki nje kuphela ukusebenzisa ngokugcwele imisebenzi yazo emihle kakhulu, kodwa kungase futhi kulimaze isiguquli sefrikhwensi nezinto zayo zokusebenza, noma kubangele ukuphazamiseka. Ngakho-ke, kufanele kuthathwe izinyathelo zokuphepha ezilandelayo ngesikhathi sokusetshenziswa:
1. Isiguquli sefrikhwensi kufanele sikhethwe ngendlela efanele.
2. Funda ngokucophelela imanuwali yomkhiqizo bese ulandela imiyalelo yokufaka izintambo, ukufakwa, nokusebenzisa.
3. Umshini wokuguqula amaza omoya kufanele usekelwe ngokuthembekile ukuze ucindezele ukuphazamiseka kwefrikhwensi yomsakazo futhi uvimbele ukushaqeka kukagesi okubangelwa ukuvuza kwesiguquli sefrikhwensi.
4. Uma usebenzisa i-frequency converter ukuze ulawule isivinini semoto kagesi, ukukhuphuka kwezinga lokushisa kanye nomsindo wemoto kuzoba phezulu kunalapho usebenzisa ugesi wegridi (imvamisa yamandla); Uma usebenza ngesivinini esiphansi, ngenxa yejubane eliphansi lama-fan fan blades, ukunakwa kufanele kukhokhwe ekungeneni komoya kanye nokupholisa, kanye nokunciphisa ngokufanele umthwalo, ukuvimbela ukukhuphuka kwezinga lokushisa kwemoto ukuba kudlule inani elivumelekile.
5. Ukuphazamiseka kolayini wokuphakela amandla angeke kube kuncane kakhulu. Lapho isiguquli sefrikhwensi sixhunywe kugridi ye-voltage, uma umthamo wesiguquli sokusabalalisa sikhulu kuno-500KVA, noma uma umthamo wesiguquli sokusabalalisa sikhulu kunezikhathi eziyi-10 kunesiguquli samafrikhwensi, noma uma isiguquli semvamisa sixhumeke eduze kakhulu nesiguquli sokusabalalisa, ngenxa yokuvinjwa kwesekethe encane, kuzokwenziwa ukuqhuma okukhulu kusiguquli semvamisa esizolimala ngesikhathi sokufaka kabusha. Uma i-impedance yolayini iphansi kakhulu, ireactor ye-AC kufanele ifakwe phakathi kwegridi yamandla nesiguquli sefrikhwensi.
6. Uma izinga lokungalingani kwezigaba ezintathu ze-voltage yegridi yamandla likhulu kuno-3%, inani eliphakeme lamanje lokufaka le-converter ye-frequency lizoba likhulu kakhulu, elingabangela ukushisa ngokweqile kwesiguquli se-frequency kanye noxhumo lwaso noma ukulimala kwezingxenye ze-electronic. Ngalesi sikhathi, kuyadingeka futhi ukufaka ama-AC reactor. Ikakhulukazi uma i-transformer ixhunywe ku-V-shape, ibucayi kakhulu. Ngaphezu kokufaka i-reactor ohlangothini lwe-AC, i-DC reactor nayo idinga ukufakwa ohlangothini lwe-DC.
7. Ama-capacitor adlulele akufanele afakwe ohlangothini olungenayo ukuze kuthuthukiswe isici samandla, futhi ama-capacitor akufanele afakwe phakathi kwe-motor kanye ne-frequency converter, ngaphandle kwalokho kuzobangela ukwehla kwe-impedance yomugqa, okuholela ekudluleleni kanye nokulimala ku-converter frequency.
8. Ama-capacitor esinxephezelo awakwazi ukuxhunywa ngokuhambisana ohlangothini oluphumayo lwesiguquli semvamisa, futhi ama-capacitor awakwazi ukuxhunywa ngokufana ukuze kuncishiswe ama-harmonics we-oda eliphezulu we-voltage ephumayo yesiguquli semvamisa, ngaphandle kwalokho kungalimaza isiguquli semvamisa. Ukuze unciphise ama-harmonics. Ingaxhunywa ochungechungeni olunama-reactors.
9. Ukuqala nokumiswa kwamamotho alawulwa yiziguquli zefrikhwensi akufanele kusetshenziswe ngokuqondile ama-circuit breaker noma ama-contacters, kodwa kufanele kwenziwe kusetshenziswa amatheminali okulawula isiguquli sefrikhwensi. Uma kungenjalo, kungabangela isiguquli sefrikhwensi ukuthi silahlekelwe ukulawula futhi okungase kuholele emiphumeleni emibi.
10. Ngokuvamile akululeki ukufaka izixhumi ze-AC phakathi kwesiguquli semvamisa kanye nenjini ukuze ugweme ukugcwala ngokweqile ngesikhathi sokuphazamiseka kanye nokulimala ku-inverter. Uma ukufakwa kudingekile, isixhumi esiphumayo kufanele sivalwe ngaphambi kokuthi isiguquli sefrikhwensi sisebenze.
11. Ezimweni lapho isiguquli sefrikhwensi sishayela injini kagesi evamile ukuze isebenze njalo ngetorque, ukusebenza kwejubane eliphansi lesikhathi eside kufanele kugwenywe ngangokunokwenzeka, ngaphandle kwalokho umphumela wokukhipha ukushisa kwemoto uzowohloka futhi ukushisisa kuzoba kubi kakhulu. Uma kudingekile ukusebenza ngesivinini esiphansi kanye ne-torque engaguquki isikhathi eside, kufanele kukhethwe i-motor frequency frequency.
12. Ezimeni lapho umthwalo unyuswa khona futhi kuvame ukumisa isiqalo, kuzokhiqizwa itorque, futhi izimelaphi zokubhuleka ezifanele zidinga ukukhethwa, ngaphandle kwalokho isiguquli sefrikhwensi sizokhubeka ngenxa yamaphutha e-overcurrent noma overvoltage.
13. Uma i-motor ine-brake, i-converter ye-frequency kufanele isebenze kwimodi yokumisa mahhala, futhi isignali yesenzo sokubhuleka kufanele ikhishwe kuphela ngemva kokuba isiguquli sefrikhwensi sikhiphe umyalo wokumisa.
14. Ukuvinjwa kwe-resistor ye-braking yangaphandle yesiguquli se-frequency ayikwazi ukuba ngaphansi kwemfuneko ye-resistor ye-braking evunyelwe isiguquli se-frequency. Esigabeni sokuhlangabezana nezidingo zokubhuleka, isixhasi sokubhuleka kufanele sibe sikhulu. Ungalokothi ufinyeze itheminali okufanele ixhunywe ku-resistor yokubhuleka ngokuqondile, ngaphandle kwalokho ingozi yesekethe emfushane ingase yenzeke ngeshubhu lokushintsha ngesikhathi sokubhuleka.
15. Uma i-converter ye-frequency ixhunywe ku-motor, ayivunyelwe ukusebenzisa i-megohmmeter ukukala ukumelana nokushisa kwe-motor, ngaphandle kwalokho ukukhishwa kwe-voltage ephezulu nge-megohmmeter kuzolimaza i-inverter.
16. Ziphathe kahle izindaba zokusheshisa nokwehlisa ijubane. Isikhathi sokusheshisa nesokunciphisa esisethelwe isiguquli sefrikhwensi sifushane kakhulu, okungase kubangele umonakalo kusiguquli samaza ngenxa yokushaqeka kukagesi. Ngakho-ke, uma usebenzisa i-converter ye-frequency, uma imishini yokulayisha ivumela, isikhathi sokusheshisa nokunciphisa kufanele sinwetshwe ngangokunokwenzeka.
① Uma umthwalo unzima, isikhathi sokusheshisa nesokwehlisa kufanele sinyuswe; Ngokuphambene nalokho, isikhathi sokusheshisa nokunciphisa singancishiswa ngokufanelekile.
② Uma okokusebenza komthwalo kudinga ukusheshisa noma ukwehliswa ngesikhathi esifushane, kuyadingeka ukucabangela ukukhulisa umthamo wesiguquli sefrikhwensi ukuze kugwenywe ubuningi bamanje obudlula umkhawulo wamanje wesiguquli sefrikhwensi.
③ Uma okokusebenza komthwalo kudinga ukusheshisa okufushane nesikhathi sokwehlisa (njengaphakathi kwesekhondi elingu-1), isistimu yokubhuleka kufanele inakwe kusiguquli sefrikhwensi. Ngokuvamile, ama-converter amafrikhwensi amakhulu afakwe amasistimu okubhuleka.
17. Gwema amaphuzu e-resonance emishini yokulayisha. Ngoba amamotho kagesi angase ahlangabezane namaphuzu okusebenza okuzwakala kwemishini ngaphakathi kwebanga elithile lefrikhwensi, okuholela ekukhanyeni kwemishini futhi kuthinte ukusebenza kwesistimu. Ngale njongo, kuyadingeka ukusetha i-jumping frequency (noma imvamisa yokugwema) yesiguquli se-frequency, bese weqa (ugweme) le frequency ukuze ugweme amaphuzu e-resonance.
18. Ngaphambi kokusebenzisa i-motor okokuqala noma isikhathi eside ngaphambi kokuyixhuma ku-converter frequency, ukumelana nokufakwa kwe-motor kufanele kulinganiswe (usebenzisa i-500V noma i-1000V megohmmeter, inani elilinganisiwe akufanele libe ngaphansi kuka-5M ohms). Uma ukumelana ne-insulation kuphansi kakhulu, kuzolimaza isiguquli sefrikhwensi.
19. Isiguquli sefrikhwensi kufanele sifakwe sibheke phezulu, kushiywe isikhala sokungenisa umoya, futhi izinga lokushisa le-ambient kufanele lilawulwe lingeqi ku-40 ℃.
20. Izinyathelo zokunqanda ukuphazamiseka kufanele zithathwe ukuze kuvinjelwe isiguquli sefrikhwensi ukuthi singaphazamiseki futhi sibe nomthelela ekusebenzeni kwaso okuvamile, noma ama-harmonics asezingeni eliphezulu akhiqizwa isiguquli sefrikhwensi ukuthi singaphazamisi ukusebenza okuvamile kwezinye izinto zikagesi.
21. Qaphela ukuvikelwa okushisayo kwemoto kagesi. Uma amandla emoto ehambisana nalawo okuguqula imvamisa, ukuvikela okushisayo ngaphakathi kwesiguquli semvamisa kungavikela ngempumelelo injini. Uma amandla alaba ababili engafani, amanani abo okuvikela kufanele alungiswe noma ezinye izinyathelo zokuzivikela zithathwe ukuze kuqinisekiswe ukusebenza okuphephile kwemoto.
Ivelu ye-elekthronikhi yokuvikela ukushisa okushisayo kwesiguquli sefrikhwensi (ukutholwa kwe-motor overload) ingasethwa ngaphakathi kwebanga elingu-25% -105% lamanje elilinganiselwe lesiguquli sefrikhwensi.