Kungani ama-motor e-variable frequency enezakhiwo ze-cage rotor?

I-rotor yenxebainjiniine-resistor exhunywe ngochungechunge ku-rotor, ukuze injini ibe ne-torque yokuqala enkulu ngokwanele kanye ne-starting current encane kakhulu (i-multiple yamanje yokuqala cishe ilingana ne-multiple ye-starting torque), futhi ingaphinde ifeze umsebenzi wokulawula isivinini sebanga elincane.

Ama-motor e-frequency variable angenza imisebenzi yokulawula ukuqala okuthambile kanye nesivinini ngokushintsha imvamisa. Ngokombono, ububanzi besivinini kusukela ku-0 kuya ku-infinity bungalungiswa kahle, kodwa empeleni, isivinini esiphansi sihlobene nezici zemvamisa ephansi yemoto, futhi isivinini esiphezulu sinqunyelwe isivinini sokusebenza somkhawulo wokuthwala; Indawo yokusebenza ephephile isukela ku-0 kuya esivinini esilinganiselwe, esingasebenza ngaphansi noma silingane ne-torque elinganiselwe, futhi kusukela esivinini esilinganiselwe kuya esivinini esiphezulu, esingasebenza ngaphansi noma silingane namandla alinganiselwe. Ngakho-ke, imoto ye-frequency variable ine-torque engaguquki kusukela ku-0 kuya esivinini esilinganiselwe futhi iphakeme kunesivinini esilinganiselwe. Izici zokulawula isivinini samandla angaguquki.

Kusukela ekuhlaziyweni kwesakhiwo semoto, imoto yekheji inesakhiwo esilula, kulula ukuyikhiqiza, futhi inamandla kakhulu ngokwemishini. Iqaphela imisebenzi yokuqalisa ethambile kanye nokulawula isivinini nge-frequency converter, futhi isivinini sayo esiphezulu sikhulu kakhulu kunese-rotor enezingqimba ezintathu engahambisani. Isakhiwo semoto kanye ne-commutator Imoto ye-DC iyisakhiwo semoto esishintshashintshayo esingabizi kakhulu futhi esithembekile.

Ngokwethiyori, i-wound rotor motor ingasebenza ngemvamisa eguquguqukayo, kodwa i-wound rotor ilahlekelwa izici ezinhle kakhulu zokumelana kwangaphandle kokuqala kanye nokulawulwa kwesivinini. Ukusebenza kokuqala okuthambile kwendlela yemvamisa eguquguqukayo kuphansi kakhulu kunokwemoto ye-squirrel cage (ukumelana kwe-wound rotor kuncane, kanti i-torque yokuqala incane), kanye nemimoya ye-rotor. Kunezingozi ezifihliwe zamaphutha kagesi njenge-turn-to-ground kanye ne-phase-to-phase short circuits kanye ne-high-speed shedding. Inkinga yokuthembeka iphansi kakhulu kune-solid squirrel cage rotor. Ngakho-ke, ngaphezu kwama-generator asynchronous alawulwa yijubane kabili noma ama-asynchronous alawulwa yijubane ngaphakathi, ama-winding Line rotor motor ngokuvamile awasebenzisi ukunikezwa kwamandla kwemvamisa eguquguqukayo.