Umphakeli wemishini esekela i-frequency converter ukukhumbuza ukuthi lapho ushayela i-motor ejwayelekile ene-frequency converter, uma kuqhathaniswa nokunikezwa kwamandla, ukulahlekelwa kuzokwanda, umphumela wokupholisa ngesivinini esiphansi uzowohloka, futhi ukunyuka kwezinga lokushisa kuzokhuphuka. Ngakho-ke, umthwalo we-motor kufanele uncishiswe ngesivinini esiphansi. Isici esivumelekile somthwalo wemoto evamile ukuthi ingasebenza ngokuqhubekayo ngomthwalo ongu-100% ngesivinini esilinganiselwe, futhi amamotho efrikhwensi aguquguqukayo kufanele acatshangelwe ngokusebenza okuqhubekayo kokulayisha okunesivinini esiphansi esingu-100%.
Umthelela we-impulse voltage:
I-voltage yokuqhuma ebangelwa i-LC resonance ku-wiring izosetshenziswa ekungeneni kwe-stator ye-motor, futhi lapho i-voltage yokuqhuma iphezulu, ingalimaza ukufakwa kwe-motor. Uma ishayelwa isiguquli sefrikhwensi yesigaba esisodwa, amandla kagesi e-DC acishe abe ngu-311V, futhi inani eliphakeme kakhulu le-voltage eguquguqukayo kumatheminali ezimoto liphinda kabili i-DC voltage. Ayikho inkinga ngamandla e-insulation. Kodwa-ke, esimweni se-3-phase frequency converter drive, i-voltage ye-DC icishe ibe ngu-537V. Njengoba ubude bezintambo bukhula, i-voltage ye-impulse izokhuphuka, engabangela ukulimala kwe-insulation ngenxa yokunganele kwe-motor insulation ukumelana ne-voltage. Ngalesi sikhathi, kufanele kucatshangelwe ukufaka i-reactor ephumayo ohlangothini lokuphumayo lwesiguquli sefrikhwensi.
Ukusebenza kwesivinini esikhulu:
Ibhalansi yamandla e-electromotive nezici zokuthwala zingashintsha ngesikhathi sokusebenza okuphezulu okufile kwamamotho ajwayelekile angaphezu kuka-50Hz. Sicela usebenzise ngokuqaphela. Ngesikhathi esifanayo, uma injini isebenza ngaphezu kwemvamisa yayo elinganiselwe, i-torque ye-motor izokwehla, futhi injini izoba sesimweni sokulawula amandla njalo.
Izici ze-torque:
Uma iqhutshwa isiguquli se-frequency, izici ze-torque zihlukile kulezo eziqhutshwa umthombo wemvamisa yamandla, futhi izici ze-torque zemithwalo yemishini kufanele ziqinisekiswe.
Ukudlidliza komshini:
A, Ukuzwakala kwemvamisa yemvelo yokudlidliza kwemishini: Ikakhulukazi uma imishini ebisebenza ngesivinini esingaguquki iguqulwa ibe ngukulawulwa kwesivinini, ukuzwakala kwemisindo kungenzeka. Ukufaka irabha ebamba ukushaqeka noma isilawuli sefrikhwensi ye-jump ekugcineni kwemoto kungaxazulula le nkinga ngempumelelo.
B, Ukungalingani okusele komzimba ojikelezayo ngokwawo: ukunakwa okukhethekile kufanele kukhokhwe lapho usebenza ngesivinini esiphezulu esingaphezu kuka-50.00Hz.
Umsindo:
Ngokuyisisekelo kuyafana nalapho uqhutshwa ukunikezwa kwamandla ngemvamisa efanayo, umsindo we-electromagnetic ungazwakala ngesikhathi sokusebenza kwenkampani yenethiwekhi ephansi, okuyinto evamile; Kodwa uma ijubane liphakeme kunejubane elilinganiselwe lemoto, umsindo wemishini nomsindo wefeni yemoto kuba sobala kakhulu.
Kufakwe kumamotho akhethekile
I-Pole motor eguquguqukayo:
Ngenxa yomehluko phakathi kwesilinganiso samanje semoto kanye nenjini evamile, kuyadingeka ukuqinisekisa ubuningi bamanje bemoto ngaphambi kokukhetha isiguquli semvamisa. Ukushintshwa kwenombolo yezigxobo kufanele kwenziwe ngemuva kokuthi isiguquli sefrikhwensi siyeke ukukhipha. Ukushintsha inombolo yezigxobo ngesikhathi sokusebenza kungase kuphumele ezenzweni zokuvikela ezifana ne-overvoltage kanye ne-overcurrent, okubangela ukuba isiguquli sefrikhwensi singasebenzi kahle futhi sivale.
Injini yangaphansi kwamanzi:
Ngokuvamile, isilinganiso samanje samamotho angaphansi kwamanzi siphezulu kunalawo amamotho ajwayelekile. Lapho ukhetha umthamo we-converter yemvamisa, kufanele kuqashelwe ukulinganisa kwamanje kwenjini. Ukwengeza, uma ibanga lezintambo phakathi kwenjini nesiguquli sefrikhwensi lilide, lingase libangele i-alamu yephutha lesiguquli semvamisa ngenxa yokuvuza okukhulu kwamandla. Ngalesi sikhathi, kufanele kucatshangelwe ukufaka i-reactor ephumayo yokuguqula imvamisa; Uma ibanga lezintambo lilide, lingase futhi libangele ukwehla kwe-torque ye-motor, futhi kufanele kusetshenziswe ikhebula eliwugqinsi ngokwanele.
Injini yokuvikela ukuqhuma:
Lapho ushayela amamotho angaqhumisi, kuyadingeka ukuthi uhlole izinto ezingaqhumi ngemva kokuba isiguquli senjini kanye nemvamisa kufaniswe. Uma usebenzisa i-universal frequency converter efanayo, kuyadingeka ukubeka isiguquli sefrikhwensi endaweni engenakho ukuqhuma.
Imoto ene-reducer:
Ngenxa yomehluko wezindlela zokuthambisa kanye nabakhiqizi, ibanga lejubane lokusetshenziswa okuqhubekayo nalo liyahlukahluka. Ikakhulukazi ngesikhathi sokugcoba uwoyela, kunengozi yokuvutha ngenxa yokunganele kwamafutha okugcoba ngesikhathi sokusebenza okuqhubekayo ebangeni eliphansi lejubane. Uma ijubane lidlula ku-50Hz, sicela uthintane nabakhiqizi bezinjini kanye nama-gearbox.
I-synchronous motor:
Amanje aqalayo kanye namanje akalwe aphakeme kunamamotho ajwayelekile. Uma usebenzisa i-frequency converter, sicela unake ukukhethwa komthamo wesiguquli sefrikhwensi. Phakamisa ukukhulisa ukukhetha kwezinga lokuqala. Lapho amamotho amaningi e-synchronous eqala ukusebenza kancane kancane, izenzakalo ezingavumelaniyo zingenzeka. Akunconywa ukuba nenjini eyodwa enamamotho amaningi.
Injini yesigaba esisodwa:
Amamotho esigaba esisodwa awafaneleki ukulawulwa kwesivinini sokuguqula imvamisa. Uma usebenzisa indlela yokuqala ye-capacitor, i-capacitor ingase yonakaliswe ngenxa yomthelela wamanje we-high-frequency, futhi i-capacitor yokuqala ingabangela kalula amaphutha angaphezu kwamandla ngesikhathi sokuqala kwe-converter frequency; Uma uqala ngokuhlukana kwesigaba kanye nokuhlehla ukuxhumana, iswishi ye-centrifugal yangaphakathi ngeke isebenze futhi ingase ishise ikhoyili yokuqala. Sicela uzame ukusebenzisa injini enezigaba ezintathu esikhundleni salokho.
Umshini wokudlidliza:
Umshini wokudlidliza uyinjini efakwe ibhulokhi engalingani ekugcineni kwe-shaft yemoto yendawo yonke. Ngesikhathi sokusebenza, i-motor current izoshintsha futhi ishintshe. Lapho kukhethwa umthamo wesiguquli sefrikhwensi, umkhawulo wamanje kufanele uqinisekiswe ukuthi ungaphakathi kwesilinganiso samanje sesiguquli sefrikhwensi.
I-Winding motor:
Injini yesilonda ilawulwa noma iqalwe ngokufaka isixhasi ochungechungeni ku-rotor. Uma usebenzisa i-variable frequency regulation, yenza i-short-circuit i-rotor winding futhi uyisebenzise njenge-asynchronous motor evamile.