Lolu hlobo lwemishini luhlanganisa iziko lokumelana, imishini yokulungiswa kwezinga lokushisa, njll. Izakhi zokumelana nezintambo ezisetshenziselwa ukulayisha izinto zokushisa zikagesi zingafinyelela izikhathi ezingu-1.4 zamanje ezilinganiselwe. Uma ukukhuphuka kwamandla kagesi kucatshangelwa, okwamanje kuzokwanda. Ibanga lamanje lokuguquguquka kwalolu hlobo lomthwalo lincane kakhulu, lingeka-AC-1 ngokuya ngesigaba sokusetshenziswa, futhi ukusebenza akuvamile. Lapho ukhetha i-contactor, kuyadingeka kuphela ukwenza i-Ith yokusebenza elinganisiwe yamanje ye-contactor ilingane noma iphindwe izikhathi ezingu-1.2 zamanje zokusebenza kwemishini yokushisa kagesi.
3.2 Ukukhethwa kwezixhumi zokulawula izinto zokukhanyisa
Kunezinhlobo eziningi zemishini yokukhanyisa, futhi izinhlobo ezahlukene zemishini yokukhanyisa zinezikhathi ezahlukene zokuqala zamanje kanye nesikhathi sokuqala. Isigaba sokusetshenziswa salolu hlobo lomthwalo yi-AC-5a noma i-AC-5b. Uma isikhathi sokuqalisa sisifushane kakhulu, i-Ith yamanje yokushisa ingakhethwa ukuthi ilingane nezikhathi ezingu-1.1 zamanje zokusebenza kwemishini yokukhanyisa. Isikhathi sokuqalisa side futhi isici samandla siphansi, futhi i-Ith yayo yokushisa yamanje ingakhethwa ibe nkulu kunokusebenza kwamanje kwemishini yokukhanyisa. Ithebula lesi-2 libonisa izimiso zokukhetha zoxhumana nabo bemishini yokukhanyisa ehlukene.
Izimiso zokukhetha zoxhumana nabo bemishini yokukhanyisa ehlukene
Inombolo ye-serial Igama lempahla yokukhanyisa Iqala ukunikezwa kwamandla Isici samandla Isikhathi sokuqala Umgomo wokukhetha othintana naye
1 isibani se-incandescent 15Ie1Ith≥1.1Ie
2 Ukukhanya okuxubile 1.3Ie≈13Ith≥1.1×1.3Ie
3 Isibani se-Fluorescent ≈2.1Ie0.4～0.6Ith≥1.1Ie
4High-pressure mercury lamp≈1.4Ie0.4～0.63～5Ith≥1.1×1.4Ie
I-5 metal halide isibani 1.4Ie0.4～0.55～10Ith≥1.1×2Ie
Amalambu ayi-6 anesinxephezelo senombolo yokuphrinta amandla 20Ie0.5～0.65～10 akhethwa ngokuya ngokuqala kwamanje kwe-capacitor yesinxephezelo
3.3 Ukukhethwa kwezixhumi zokulawula ama-welding transformer kagesi
Lapho umthwalo we-low-voltage transformer uxhumekile, i-transformer izoba nesikhathi esifushane esiphezulu esiphezulu ngenxa ye-short-circuit yama-electrode ohlangothini lwesibili, futhi umbane omkhulu uzovela ohlangothini oluyinhloko, olungafinyelela ku-15 izikhathi ezingu-20 zamanje ezilinganiselwe. ezihlobene nezici eziyinhloko.Lapho umshini wokushisela kagesi uvame ukukhiqiza amandla anamandla angazelelwe, ukushintshwa ohlangothini oluyinhloko lwe-transformer
> Ngaphansi kokucindezeleka okukhulu kanye namanje, i-contactor kufanele ikhethwe ngokusho kwe-short-circuit current kanye nemvamisa ye-welding ohlangothini oluyinhloko lapho ama-electrode efinyezwa kancane ngaphansi kwamandla alinganiselwe we-transformer, okungukuthi, ukushintshwa kwamandla kukhulu i-primary-side current lapho uhlangothi lwesibili luneziyingi ezimfushane. Isigaba sokusetshenziswa semithwalo enjalo yi-AC-6a.
3.4 Ukukhethwa kwesixhumi semoto
Oxhumana nabo bezimoto bangakhetha i-AC-2 kuye ku-4 ngokuya ngokusetshenziswa kwemoto kanye nohlobo lwemoto. Okwamanje oqalayo ngezikhathi eziyisi-6 wamanje okalwe kanye nowokunqamuka kumanje olinganiselwe, i-AC-3 ingasetshenziswa. Isibonelo, amafeni, amaphampu, njll., bangasebenzisa ithebula lokubheka Indlela kanye nendlela yejika ekhethiwe ikhethwa ngokwesampula nangemanyuwali, futhi asikho esinye isibalo esidingekayo.
Ijika elijikajikayo kanye nelephukayo lemoto yesilonda kokubili izikhathi ezikaliwe izikhathi ezingu-2.5. Ngokuvamile, lapho uqala, i-resistor ixhunywe ochungechungeni nge-rotor ukuze kukhawulwe okwamanje kokuqala futhi kwandise i-torque yokuqala. Isigaba sokusetshenziswa yi-AC-2, futhi isixhumi esijikelezayo singakhethwa.
Uma injini igijima, igijima ihlehla futhi ibhuleka, i-current exhunyiwe i-6Ie, futhi isigaba sokusebenzisa i-AC-4, eqinile kakhulu kune-AC-3. Amandla emoto angabalwa kusukela kumaza asohlwini ngaphansi kweSigaba Sokusetshenziswa AC-4. Ifomula imi kanje:
Pe=3UeIeCOS￠η,
I-Ue: i-motor rated current, okungukuthi: amandla kagesi akalwe yimoto, i-COS￠: isici samandla, η: ukusebenza kahle kwemoto.
Uma impilo yoxhumana naye ivunyelwe ukuba ibe mfushane, i-AC-4 yamanje ingakhushulwa ngokufanelekile, futhi ingashintshwa ibe yi-AC-3 ngemvamisa ephansi kakhulu yokuvala.
Ngokusho kwezidingo zokuxhumanisa ukuvikelwa kwezimoto, okwamanje okungaphansi kwe-rotor yamanje ekhiyiwe kufanele ixhunywe futhi iphulwe idivayisi yokulawula. I-rotor yamanje ekhiyiwe yamamotho amaningi ochungechunge lwe-Y ithi ≤7Ie, ngakho-ke i-rotor yamanje yokuvula nokuvala kufanele icatshangelwe lapho kukhethwa isixhumi. Ukucaciswa kucacisa ukuthi uma injini isebenza ngaphansi kwe-AC-3 futhi isilinganiso samanje se-contactor singesikhulu kuno-630A, othintana naye kufanele akwazi ukumelana namanje izikhathi ezingu-8 ezilinganiselwe okungenani imizuzwana eyi-10.
Kumamotho emishini ejwayelekile, ukusebenza kwamanje kungaphansi kwesilinganiso samanje, nakuba isiqalo samanje sifinyelela izikhathi ezingu-4 kuya kwezingu-7 zamanje ezilinganisiwe, kodwa isikhathi sifushane, futhi umonakalo kothintana nabo oxhumana nabo awukhulu. Lesi sici sicatshangelwe ekwakhiweni kwe-contactor, futhi ngokuvamile kukhethwa Umthamo wokuxhumana kufanele ube mkhulu kunezikhathi ezingu-1.25 umthamo olinganiselwe wemoto. Kumamotho asebenza ngaphansi kwezimo ezikhethekile, kufanele kubhekwe ngokuya ngezimo zangempela zokusebenza. Isibonelo, i-hoist kagesi ingeyomthwalo womthelela, umthwalo osindayo uqala futhi ume kaningi, ukuhlehla ukubhuleka koxhumano, njll., ngakho-ke ukubalwa kwamandla okusebenza kufanele kuphindwe ngokuphindaphindiwe okuhambisanayo, ngoba umthwalo osindayo uqala futhi ume njalo. , khetha izikhathi ezingu-4 zamanje ezilinganiselwe ze-motor, ngokuvamile ukubuyisela emuva uxhumano ngaphansi komthwalo osindayo I-braking current iphindwe kabili yamanje yokuqala, ngakho-ke izikhathi ezingu-8 zamanje ezilinganiselwe kufanele zikhethwe kulesi simo sokusebenza.
Isikhathi sokuthumela: Jul-10-2023