Ukukhishwa kwe-corona kwenzeka lapho insimu kagesi engalingani ikhiqizwa ngumqhubi ongasheleli. Eduze kwensimu kagesi engalingani futhi eduze kwe-electrode ene-radius encane yokugoba, lapho i-voltage ikhuphuka iye ezingeni elithile, ngenxa ye-ionization yomoya, kuzovela ukukhishwa, kwakha i-corona.
Kusukela ezimweni zokukhiqizwa kwe-corona, singathola ukuthi amasimu kagesi angalingani, ama-conductor angasheleli, kanye nama-voltage aphezulu ngokwanele yizimo ezidingekayo zokukhiqizwa kwe-corona. Ngakho-ke, i-corona izokwenzeka ekugcineni kokugoqana kwama-motor ane-voltage ephezulu, ikakhulukazi kuma-motor ane-voltage elinganisiwe ephakeme kune-6kV, i-corona yama-windings e-stator izocaca kakhulu, futhi uma i-voltage iphakeme, inkinga ye-corona izoba nkulu kakhulu. Ngakho-ke, kuma-windings ama-motor ane-voltage ephezulu, kuthathwa izinyathelo zokwelapha i-anti-corona ngokusebenzisa izintambo ezikhethekile ze-electromagnetic kanye nama-tape okumelana nokugoqa ngaphandle kwama-winding coil. Ngokuphathelene nenkinga ye-corona yama-motor ane-voltage ephezulu, ukuqonda kwabantu kusendaweni ethile. Pho-ke, kungani i-corona isenzeka nakuma-motor ane-variable-frequency?
Ama-motor e-variable frequency anikwa amandla yi-variable frequency drive. Ukukhishwa kwe-voltage yi-variable frequency drive akuyona i-sine wave efana ne-power supply ku-industrial frequency, kodwa yi-square wave enokuphakama nokwehla okukhulu. Leli wave elikhethekile le-pulse libangela ukuthi i-input voltage yemoto ibe ne-periodic peak overvoltages ephindwe kabili kune-voltage elinganisiwe. Ngenxa yejubane elisheshayo kakhulu lale pulse overvoltage, kuzobangela ukungalingani okukhulu ekusakazweni kwensimu kagesi yama-motor windings. Nakuba iningi lama-motor e-variable frequency lingama-motor ane-voltage ephansi, indlela ekhethekile yokunikezwa kwamandla inquma ukungalingani kwensimu kagesi kuma-windings ayo.
Ngokusekelwe ezicini zenani lama-windings kanye nobude bokugoba ngakunye kumoto, ama-windings okuqala nawokugcina kwe-low-voltage high-power winding motor athwala cishe yonke i-voltage amplitude, futhi nawo avame kakhulu ukuba nezinkinga ekugobeni kwemoto. Ngaphezu kwalokho, kusukela ekuhlaziyweni kwenqubo yokushumeka kwama-winding, i-winding coil yokuqala ibhekene nomonakalo omkhulu, ngakho-ke ibhekene nengozi enkulu. Yingakho abakhiqizi bezimoto abaningi behlinzeka ngokuvikelwa okukhethekile kwama-windings okuqala nawokugcina. Kuma-motor ane-voltage ephezulu enamandla aguquguqukayo aphansi, ngenxa yamandla ensimu angalingani kanye ne-voltage ephezulu ebukhali ye-pulse, iziphetho ze-motor winding zinezimo eziyisisekelo zokukhiqizwa kwe-corona. Ukuvimbela ukukhiqizwa kwe-corona kumoto ene-variable frequency, ukugoba kwe-variable frequency motor kufanele kuthathe ucingo olukhethekile lwe-anti-corona electromagnetic, futhi kufanele kuthathwe izinyathelo ezikhethekile zokuvikela kuma-windings okuqala nawokugcina.
Isikhathi sokuthunyelwe: Julayi-31-2025