Motors ndechimwe chezvinhu zvakajairika zvemagetsi muhupenyu hwezuva nezuva. Ndeipi misiyano pakativariable frequency motorsuye akajairwa maindasitiri frequency mota?
Mota zvigadziriso zvemagetsi zvinotsamira pamusimboti we electromagnetic induction kuti uone simba remota uye kutapurirana. Basa rayo guru nderekugadzira dhiraivha torque sesosi yemagetsi kana mechini simba.
Odinary motorsuye akasiyana frequency motors ese ari maviri asynchronous mota. Iri kushanda musimboti: Iyo stator inotenderera yemota itatu-chikamu mhepo inotenderedza iyo inofananidzwa muchadenga. Kana matatu-chikamu symmetrical AC ikozvino yakawedzerwa kune stator mhepo, inotenderera yemagineti inogadziriswa mukati memota. Iyi inotenderera yemagineti inocheka kutenderera kwe rotor, nekudaro ichigadzira ikozvino induced mukutenderera kwe rotor. Ikozvino-inotakura rotor inoburitsa simba remagetsi pasi pechiito cheiyo stator inotenderera magineti, nekudaro ichityaira mota kutenderera.
Variable frequency motors uye akajairwa maindasitiri frequency motors Maota mamota akajairika, asi ndeapi mabhenefiti eanosiyana frequency motors achienzaniswa neakajairwa mota?
- Variable frequency motors inogona kushanda pakadzika kwazvo ma frequency uye voltages. Uye vanogona kutangwa pasina kukanganisa ikozvino. Yakasiyana-siyana mabhureki nzira dzakapihwa neinverter dzinogona kushandiswa kukurumidza braking kuti uwane kazhinji kutanga uye braking. Nekuti akasiyana frequency motors anogona kuwana akawanda anodiwa mashandiro uye akaomarara anoshanda nharaunda kupfuura akajairwa mota. Naizvozvo, anochinja-chinja ma frequency motors ane yakakwirira insulation mazinga kupfuura akajairwa mota mukugadzira, anomanikidzirwa kutonhora masisitimu (akavakirwa-mukati ekutonhodza mafeni), yakasimba mechanicha simba muchimiro, zviri nani rotor kutakura uye hupenyu hwesevhisi hurefu kupfuura mota dzakajairwa.
- Sezvatinoziva tese, mota dzakajairwa dzinogona kushanda chete pasi pemamiriro e50 Hz simba frequency. Kana iyo frequency kusiyanisa renji yakakurisa, mota inodziya zvakanyanya kana kutopisa mota. Nekudaro, akasiyana frequency mota anogona kugadzirisa kumhanya kwemota pane chero kumhanya mukati mekumhanya renji pasina kukuvara. Mumamiriro ezvinhu akajairwa, akasiyana frequency motors anogona kushanda achienderera mukati meiyo yakayerwa yekumhanyisa renji pane yakazara yakayerwa mutoro, uye kukwira kwekushisa kwemota hakuzopfuure kukosha kwemota calibration.
- Kunyangwe ma frequency motors ari kudhura zvishoma pane akajairwa mota mumutengo, zvakanakira iwo zviri pachena. Iyo AC yekumhanyisa kudzora nzira ye frequency converter pamwe nekusiyana frequency mota inogona kuvandudza zvakanyanya dhigirii remakanika otomatiki uye kugona kugadzira. Uye zvakare, iyo yakapfava yekutanga basa reiyo frequency inoshandura zvakare inoderedza kukanganiswa kweiyo hombe pane gidhi remagetsi kana mota dzakajairwa dzichitanga, uye inochengetedza simba rakawanda pane akajairwa mota.
Sezvo mitengo yefrequency converters uye inosiyana frequency motors ichiramba ichidonha, mashandisirwo emhando dzakasiyana mota mota dzinowedzera kuwedzera.