Harmonic control scheme for ukuchithwa kwesithando somlilo

Isithando somlilo esincibilikisa induction: iyithuluzi elinikezela amandla eliguqula imvamisa yamandla angu-50HZ eshintshashintshayo yamanje ibe ifrikhwensi emaphakathi (300HZ ngaphezulu kuya ku-1000HZ), eguqula imvamisa yamandla ezigaba ezintathu eshintshashintshayo ibe yamanje eqondile ngemva kokulungiswa, bese iguqula igagasi eliqondile libe elimaphakathi elilungisekayo. i-frequency current for supply I-medium frequency alternating current egeleza ku-capacitor kanye nekhoyili yokungeniswa ikhiqiza imigqa yamandla kazibuthe ephezulu ukuminyana kukhoyili yokungeniswa, futhi inqamula into yensimbi equkethwe kukhoyili yokungeniswa, ekhiqiza amandla amakhulu e-eddy ensimbi. impahla.

1. Umgomo wokusebenza wesithando somlilo sokuncibilika

Isithando somlilo sokuncibilika se-induction sakhiwe ngokuyinhloko ukunikezwa kwamandla, ikhoyili yokungeniswa kanye ne-crucible eyenziwe ngezinto eziphikisayo kukhoyili yokungeniswa. I-crucible iqukethe ukushaja kwensimbi, okulingana nokujika kwesibili kwe-transformer. Uma ikhoyili yokungeniswa ixhunywe kugesi we-AC, inkambu kazibuthe eshintshanayo ikhiqizwa ikhoyili yokungeniswa. Njengoba ukushaja ngokwayo kwakha i-loop evaliwe, i-winding yesibili ibonakala ngokujika okukodwa futhi ivaliwe. Ngakho-ke, i-current induced ikhiqizwa enkokhelweni ngesikhathi esifanayo, futhi lapho i-current induced idlula enkokhelweni, inkokhiso iyashiswa ukuze ikhuthaze ukuncibilika kwayo.

Isithando somlilo se-induction sisebenzisa ukunikezwa kwamandla okuvama okumaphakathi ukuze kusungulwe inkambu kazibuthe yefrikhwensi ephakathi, ekhiqiza ama-eded currents ngaphakathi kwempahla ye-ferromagnetic futhi ikhiqize ukushisa, ukuze kufezwe inhloso yokushisisa into. Isithando somlilo sokuncibilika se-induction sisebenzisa amandla aphakathi kwama-200-2500Hz okushisa okungeniswayo, ukuncibilika nokugcina ukushisa. Isithando somlilo se-induction sisetshenziselwa ikakhulukazi ukuncibilikisa insimbi ye-carbon, i-alloy steel, insimbi ekhethekile, futhi ingasetshenziselwa ukuncibilikisa nokufudumeza izinsimbi ezingenayo insimbi njengethusi ne-aluminium. Imishini incane ngosayizi. , Isisindo esilula, ukusebenza kahle okuphezulu, ukusetshenziswa kwamandla okuphansi, ukuncibilika okusheshayo nokushisa, ukulawula okulula kwezinga lokushisa lomlilo, nokusebenza kahle kokukhiqiza okuphezulu.

2. Izici ze-Harmonic ezikhiqizwe isithando somlilo esincibilikayo sokungeniswa

Ngokuvamile, iziko lokuncibilika kwe-6-pulse induction ikakhulukazi likhiqiza i-harmonics yesici sesi-5 nesi-7; kumadivayisi e-12-pulse converter, ikakhulukazi akhiqiza i-harmonics yesici sesi-5, sesi-11, nese-13. Ngaphansi kwezimo ezijwayelekile, amadivaysi amancane okuguqula asebenzisa ama-pulses angu-6, kanti amakhulu asebenzisa ama-pulses angu-12. Isibonelo, uhlangothi lwesibili lwesibili lwe-transformer yesithando somlilo luxhunywe ngohlobo lwe-Y/△ ukuze kuzuzwe ukushintshwa kwesigaba kwamadigri angu-30; noma uhlangothi lwamandla kagesi aphezulu lweziguquli ezimbili zesithando somlilo zisebenzisa unxantathu wesandiso noma izinyathelo zokuguqula Isigaba esimazombe ezifana nokuxhunywa kohlobo kanye noxhumano lwekhona lenkanyezi olunamasekhondari amabili lwesibili lwakha ukunikezwa kwamandla kagesi okuphakathi kwamapulse angu-24 ukuze kwehliswe izinga lethonya le-harmonics igridi yamandla.

Okwesithathu, izingozi ze-harmonic

Isithando somlilo se-induction sikhiqiza inani elikhulu lama-harmonics lapho sisetshenziswa, okubangela ukungcoliswa okukhulu kwe-harmonic kugridi yamandla. Ama-Harmonics anciphisa ukusebenza kahle kokudluliswa nokusetshenziswa kwamandla kagesi, abangele ukuthi izinto zikagesi zishise ngokweqile, zikhiqize ukudlidliza nomsindo, futhi zenze ukuguga kwawo kwe-insulation, kunciphise impilo yesevisi, ngisho nokungasebenzi kahle noma ukusha; ama-harmonics angabangela i-parallel resonance yasendaweni noma i-resonance yochungechunge kusistimu yamandla. Khulisa okuqukethwe kwe-harmonic, okubangela ukuthi imishini yesinxephezelo ye-capacitor nezinye izinto zokusebenza zishise. Esimeni lapho isinxephezelo samandla asebenzayo singeke sisetshenziswe, izinhlawulo zamandla asebenzayo zizokwenzeka, okuholela ekwenyukeni kwezikweletu zikagesi. I-Harmonics futhi ingabangela ukungasebenzi kahle kokuvikelwa kwe-relay namadivayisi azenzakalelayo, okubangela ukudideka esilinganisweni samandla kagesi. Ngaphandle kwesistimu yamandla, ama-harmonics azodala ukuphazamiseka okukhulu emishinini yokuxhumana kanye nemishini kagesi. Ngakho-ke, ukwenza ngcono ikhwalithi yamandla eziko lokuncibilika kokungeniswa sekube yinto eyinhloko yokuphendula.

Okwesine, isilawuli se-harmonic sokuncibilika kwesithando somlilo

Uchungechunge lwe-LBAPF-ZP lwezihlungi ezikhethekile ezisebenzayo zemishini yamafrikhwensi aphakathi zifaneleka ngokukhethekile izinhlelo zokulayishwa kwesithando somlilo sokungeniswa ezinokuqukethwe okuphezulu kakhulu kwe-harmonic. Ingakwazi ukuxazulula ukushisa nokushisa kwesistimu lapho umthwalo utholakala khona, ukwanda komsindo, ukwehluleka kokushintshwa kwesinxephezelo se-capacitor, kanye nezingxenye zesifunda Ukulimala nokungasebenzi okubangelwa imisinga ye-harmonic ngokweqile njengomonakalo.

Uchungechunge lwe-LBAPF-ZP lwezihlungi ezikhethekile ezisebenzayo zemishini yemvamisa ephakathi zifakwe ngemuva kwesinxephezelo samandla asebenzayo nangaphambili komthwalo. Izinga lokuhlunga le-harmonic lomthwalo ongemuva liphezulu njenge-90%.