Umphakeli weyunithi ye-frequency converter braking unit ukukhumbuza ukuthi ngokusetshenziswa okwandayo kokuguqula ama-frequency ekukhiqizeni izimboni, ukuqonda ukwakheka kweziguquli zemvamisa, izici zikagesi zezingxenye eziyinhloko, kanye nendima yemingcele esetshenziswa kakhulu, kanye namaphutha azo avamile, kuya ngokuya kubaluleke kakhulu.
1. Okwedlulele
I-Overcurrent iyiphutha elivame kakhulu kwiziguquli zefrikhwensi. Kunezizathu eziningi ezingabangela i-overcurrent kuma-converter frequency, futhi okuvame kakhulu umthwalo. Amaphutha adlulele angahlukaniswa abe yizimo ezilandelayo:
1. Uma uqala kabusha, uma isiguquli sesivinini sihamba ngokushesha nje lapho sisheshisa, sibonisa ukuthi i-overcurrent ibucayi kakhulu, ngokuvamile ebangelwa ukujikeleza okufushane komthwalo, i-mechanical component jamming, umonakalo wemojula ye-inverter, noma i-torque encane ye-motor.
2. Ngemva kokukhanyisa, iyahamba, ngokuvamile engakwazi ukusethwa kabusha. Isizathu esiyinhloko ukuthi i-actuation circuit kanye nesekhethi yokutholwa yamanje yonakele.
3. Lapho uqala kabusha, ayikhubeki ngokushesha, kodwa kunalokho ngesikhathi sokusheshisa. Isizathu esiyinhloko singase sibe ukuthi isikhathi sokusheshisa sisethwe sifushane kakhulu, umkhawulo ophezulu wamanje usethwe uphansi kakhulu, noma isinxephezelo se-torque sisethwe phezulu kakhulu.
2, Overvoltage
1. I-alamu ye-overvoltage ivamise ukwenzeka ngesikhathi sokuvala shaqa, futhi isizathu esiyinhloko singase sibe ukuthi isikhathi sokusheshisa sifushane kakhulu noma kunezinkinga nge-resistor yokubhuleka kanye neyunithi yokubhuleka.
2. Uma kukhona iyunithi ye-braking ngaphakathi kwesiguquli se-frequency kanye ne-resistor ye-braking ixhunywe ngaphandle kwesiguquli se-frequency, uma into ethi "OU" isenzeka phakathi nenqubo yokunciphisa i-frequency converter, kufanele kube ngenxa yokwehluleka ukusetha imingcele yokukhetha ukusetshenziswa kwe-braking, ukukhethwa okungalungile kwenani lokumelana ne-braking resistor, noma iyunithi yokubhuleka ingasebenzi. Ngalesi sikhathi, isimo sokushisa se-resistor braking singabhekwa ukuze sinqume.
3. Uma kukhona iyunithi yokubhuleka kanye ne-resistor yokubhuleka exhunywe ngaphandle kusiguquli sefrikhwensi, into ethi "OU" isenzeka phakathi nenqubo yokunciphisa isiguquli semvamisa. Kungenzeka ukuthi indawo yokuthola i-"OU" yesiguquli sefrikhwensi iphansi kunendawo yokusebenza yeyunithi yokubhuleka. Kulokhu, indawo yokusebenza yeyunithi yokubhuleka kufanele ilungiswe, noma indawo yokuvikela ethi "OU" yesiguquli sefrikhwensi kufanele ilungiswe.
3. Ukungena kwamandla kagesi
I-undervoltage ibangelwa ukuthi i-voltage enkulu yesekethe iphansi kakhulu, okungenzeka kube ngenxa yokulahleka kwesigaba samandla, isekethe evulekile engalweni eyodwa yebhuloho lesekhethi yokulungisa kabusha, ukulimala kwesekethe yokushintsha umkhawulo wamanje yangaphakathi (ayikwazi ukusheshisa ukuphikiswa komkhawulo wamanje ngesikhathi sokusebenza okuvamile, okuholela ekwehleni kwe-voltage enkulu ku-resistor futhi kubangele ukuthi i-voltage ithunyelwe kusekethe ye-inverter ukuthi iphinde ibangele ukuthi isekethe ye-voltae ibe phansi kakhulu);
1. Ukulimala kwelinye lamabhuloho alungisayo noma ukusebenza okungavamile kwama-thyristors amathathu kungase kuholele emaphutheni e-undervoltage;
2. I-contactor ye-relay eyinhloko yesifunda yonakalisiwe noma i-relay yesifunda eyinhloko noma i-contactor ayibandakanyi ngenxa yezindaba zokulawula isifunda. Ukulahleka kwamandla kagesi ebhasi le-DC kungase kuholele ekungeneni kwamandla emshinini wokushaja.
3. Isekhethi yokuthola i-voltage ayisebenzi kahle, okuholele ezinkingeni zokungasebenzi kahle.
4. Ukushisa ngokweqile
Ukushisa ngokweqile kuyiphutha elivamile leziguquli zefrikhwensi, okungenzeka kubangelwe izinga lokushisa eliphezulu le-ambient, ukuma kwamafeni okupholisa, izinzwa zokushisa ezingezinhle, noma ukushisa ngokweqile kwemoto.
1. Izinga lokushisa elizungezile liphezulu kakhulu, ikakhulukazi ehlobo. Kumakhasimende asekelayo, isiguquli semvamisa sivamise ukufakwa kukhabhinethi yokulawula. Uma izimo zokupholisa zekhabhinethi yokulawula zingakwazi ukuhlangabezana nezidingo, kuzokwenza ukuthi izinga lokushisa ngaphakathi kwekhabhinethi yokulawula libe phezulu kakhulu futhi "lokushisa".
2. I-Axial flow fan ibambekile noma ayisebenzi.
5. I-voltage ephumayo engalingani
I-voltage ephumayo engalingani ngokuvamile ibonakala njengejubane lemoto elingazinzile nokuzamazama, futhi izizathu eziyinhloko zingaba:
1. Imoduli ye-inverter iphukile, okuholela ekuphumeni kwe-voltage yezigaba ezintathu ezingalingani;
2. Umjikelezo wedrayivu we-converter frequency wonakalisiwe, obangela ukungalingani ku-voltage okukhiphayo wezigaba ezintathu;
3. I-contactor ephumayo ilimele, ibangele ukuthi injini isebenze ekulahlekelweni kwesigaba;
4. Ukuxhumana okungalungile kwekhebula lokukhipha ngezinye izikhathi kuholela ekulahlekelweni kwesigaba emotweni;
6. Ukugcwala
Ukulayisha ngokweqile kuyiphutha elivamile, futhi lapho ukugcwala ngokweqile kwenzeka, kufanele kuhlaziywe kuqala ukuthi ukugcwala kwezimoto noma ukugcwala kwe-frequency converter. Ngokuvamile, ngenxa yomthamo oqinile wokugcwala kwemoto, inqobo nje uma imingcele yesiguquli semvamisa isethwe kahle, i-motor ayilayishi kalula; Ukuze uthole i-alamu yokulayisha ngokweqile yesiguquli sefrikhwensi, kuyadingeka ukuhlola ukuthi i-voltage ephumayo yesiguquli semvamisa ijwayelekile yini.