Umphakeli weyunithi yempendulo yamandla yesiguquli sefrikhwensi ukukhumbuza ukuthi uma kuziwa emsebenzini wokuvikela wesiguquli sefrikhwensi, vele uhlobene nokuvikelwa okuthile kwamaphutha okwenzeka kusiguquli sefrikhwensi. Ezinhlelweni ezisebenzayo, imvamisa isho umsebenzi wokuvikela wesistimu yokudlulisa okuhlanganisa isiguquli sefrikhwensi, njengokuvikela ulayini, ukuzivikela ngokwakho kwesiguquli sefrikhwensi, ukuvikelwa kwemoto, ukuvikela umthwalo ngomshini, njll.
Idivayisi yokuvikela ehlanganisiwe ngaphakathi kwesiguquli sefrikhwensi
(1) Ukuvikelwa kokugcwala kwezimoto
Isici esiyisisekelo sokugcwala kwe-thermal motor kagesi ukuthi izinga lokushisa langempela liyakhuphuka lidlula izinga lokushisa elilinganiselwe. Ngakho-ke, inhloso yokuvikela ukulayisha ngokweqile kwama-motor kagesi nawo ukuqinisekisa ukuthi angakwazi ukusebenza ngokujwayelekile futhi angashi ngenxa yokushisa ngokweqile.
Lapho i-motor kagesi isebenza, amandla ayo alahlekile (ikakhulukazi ukulahlekelwa kwethusi) aguqulwa abe amandla okushisa, okwenza izinga lokushisa lemoto likhuphuke. Inqubo yokushisisa yemoto kagesi ingeyenqubo yenguquko yokulinganisa okushisayo, futhi umthetho wayo oyisisekelo ufana nomthetho ovamile wokukhuphuka kwejika (noma ukuwa). Ukubaluleka kwayo ngokomzimba kulele eqinisweni lokuthi njengoba izinga lokushisa lemoto kagesi likhuphuka, kufanele likhiphe ukushisa endaweni ezungezile. Uma izinga lokushisa likhula, ukuqeda ukushisa kushesha. Ngakho-ke, ukukhuphuka kwezinga lokushisa akukwazi ukukhuphuka ngokulandelana, kodwa kunalokho kunciphisa njengoba kukhuphuka; Lapho ukushisa okukhiqizwa injini kulinganisa nokushisa okuchithiwe, ukukhuphuka kwezinga lokushisa ngalesi sikhathi ukukhuphuka kwezinga lokushisa okulinganiselwe.
Amazinga okukhiqiza ama-asynchronous motors achaza izinhlobo ezahlukene zamazinga asekelwe ekukhuphukeni okuphezulu kwezinga lokushisa okuvumelekile, okuyiClass A 105 ℃, Class E 120 ℃, Class B 130 ℃, Class F 155 ℃, kanye neClass H 180 ℃.
Ukugcwala kwemotor okushisayo kubhekisela ekulayisheni okweqile kwemishini ku-motor shaft, okubangela amandla okusebenza enjini ukuba adlule inani elilinganiselwe futhi okuholela ekukhuphukeni kwezinga lokushisa okudlula inani elilinganiselwe. Izici eziyinhloko ze-motor overload yilezi:
① Ukwanda kwamanje akubalulekile. Ngoba ekukhethweni nasekuklanyweni kwamamotho kagesi, ukusebenza okuphezulu kwamanje komthwalo ngokuvamile kucatshangelwa ngokugcwele, futhi umklamo usekelwe ekukhuphukeni okuphezulu kwezinga lokushisa kwemoto. Ngemithwalo ethile eguquguqukayo nemithwalo yesikhashana, ukulayishwa ngokweqile kwesikhathi esifushane kuvunyelwe. Ngakho-ke, ngaphansi kwezimo ezijwayelekile, i-amplitude ye-overload yamanje ayinkulu kakhulu.
② Ngokuvamile, izinga loshintsho lwe-di/dt yamanje lincane futhi likhuphuka kancane.
(2) Ukuvikelwa kwesekethe emfushane ekugcineni kokuphumayo kwesiguquli sefrikhwensi
Uma kunesigaba sesigaba somjikelezo omfishane ekugcineni kokuphumayo kwesiguquli se-frequency (itheminali yemoto noma umugqa phakathi kwesiguquli sefrikhwensi kanye nenjini), isiguquli sefrikhwensi sizobona iphutha lesekethe emfishane futhi sinqamule isekethe phakathi kwama-millisecond ambalwa ukuze kuqinisekiswe ukuphepha kwesiguquli sefrikhwensi kanye nemishini yemoto.
(3) Eminye imishini yokuzivikela
① Ingxenye ye-elekthronikhi yokuvikela ukushisisa ngokweqile: Uma izinga lokushisa lidlula umkhawulo obekiwe, inzwa ebekwe kudivayisi yokukhipha ukushisa izomisa isiguquli sefrikhwensi ukuthi sisebenze, ivimbele ukulimala kwezingxenye ze-elekthronikhi okubangwa ukushisa ngokweqile.
② Ukuvikelwa kokwehla kwamandla kagesi womugqa osheshayo: Lo msebenzi wokuvikela ungavimbela amaphutha kumasekhethi okulawula namamotho, kanye nokuvikela ukudlula ngokweqile okubangelwa ukubuyiswa kwamandla kalayini.
③ Ukuvikelwa kwe-overvoltage yezintambo zikagesi: Lo msebenzi wokuvikela uvimbela ukulimala kwezingxenye.
④ Ukuvikelwa kwesigaba sokulahlekelwa: Ukulahlekelwa kwesigaba kuzodala ukukhuphuka okukhulu kwamanje.
(4) Ukusebenza kwedivayisi yokuvikela ehlanganisiwe
Uma kukhona ukungasebenzi kahle, idivayisi yokuvikela engenhla izomisa isiguquli semvamisa, ivumele injini ukuthi ime ngokukhululekile, futhi amandla azonqanyulwa yi-relay ehlanganisiwe yangaphakathi.