AC motors tuaj yeem muab faib ua ob pawg loj - (i) Synchronous motor thiab (ii) Asynchronous motor. Lub cev muaj zog asynchronous yog nrov hu ua Induction motor. Ob hom no sib txawv heev ntawm ib leeg. Qhov sib txawv loj ntawm lub tshuab synchronous thiab lub cev muaj zog induction tau tham hauv qab no.
Kev tsim kho qhov txawv
Synchronous lub cev muaj zog: Stator muaj axial slots uas muaj stator winding qhov txhab rau ib tug xov tooj ntawm tus ncej. Feem ntau ib tug salient ncej rotor yog siv nyob rau hauv uas rotor winding yog mounted. Rotor winding yog pub nrog DC mov nrog kev pab los ntawm cov hlua khi. Ib lub rotor nrog cov hlau nplaum tas mus li tuaj yeem siv tau.
Induction lub cev muaj zog: Stator winding zoo ib yam li lub tshuab synchronous. Nws yog mob rau ib tug xov tooj ntawm tus ncej. Cov squirrel tawb rotor los yog lub qhov txhab rotor tuaj yeem siv tau. Hauv squirrel tawb rotor, rotor tuav yog luv luv-circuited nrog kawg rings. Nyob rau hauv lub qhov txhab rotor, windings kuj tseem luv luv-circuited, yog li tsis tas yuav tsum muaj lub nplhaib.
Qhov txawv ntawm kev ua haujlwm
Synchronous lub cev muaj zog: Stator ncej tig ntawm lub synchronous ceev (Ns) thaum pub nrog peb theem mov. Lub rotor yog pub nrog DC mov. Lub rotor yuav tsum tau tig ntawm qhov nrawm ze rau qhov ceev synchronous thaum pib. Yog tias ua tau li ntawd, cov rotor ncej tau txais cov hlau nplaum sib txuas nrog cov rotating stator ncej, thiab yog li lub rotor pib tig ntawm lub synchronous ceev.
Synchronous lub cev muaj zog ib txwm khiav ntawm qhov nrawm sib npaug rau nws qhov ceev synchronous.
xws li qhov tseeb ceev=Synchronous ceev
los yog N=Ns=120f/P
Induction lub cev muaj zog: Thaum lub stator tau noj nrog ob lossis peb theem AC mov, lub Rotating Magnetic Field (RMF) yog tsim. Tus txheeb ze ceev ntawm stator lub rotating magnetic teb thiab lub rotor yuav ua rau ib tug induced tam sim no nyob rau hauv lub rotor conductors. Lub rotor tam sim no ua rau lub rotor flux. Raws li Lenz txoj cai, cov kev taw qhia ntawm qhov induced tam sim no yog xws li tias nws yuav nyiam tawm tsam qhov ua rau nws cov khoom, piv txwv li tus txheeb ze ceev ntawm stator's RMF thiab rotor. Yog li, lub rotor yuav sim ntes nrog RMF thiab txo cov txheeb ze ceev.
Induction lub cev muaj zog ib txwm khiav ntawm qhov ceev uas tsawg dua qhov ceev synchronous.
ie N< Ns
Lwm qhov txawv
Synchronous motors xav tau ib qho ntxiv DC fais fab mov rau energizing rotor winding. Induction motors tsis xav tau lub zog ntxiv.
Slip rings thiab txhuam yog yuav tsum tau nyob rau hauv synchronous motors, tab sis tsis nyob rau hauv induction motors (tshwj tsis yog qhov txhab hom induction lub cev muaj zog nyob rau hauv uas lub nplhaib nplhaib motors yog siv los ntxiv rau sab nraud tsis kam rau lub rotor winding).
Synchronous motors xav tau kev pib dua tshiab kom pib tig lub rotor ze rau qhov ceev synchronous. Tsis muaj kev pib mechanism yog xav tau nyob rau hauv induction motors.
Lub zog ntawm lub tshuab hluav taws xob synchronous tuaj yeem hloov kho mus rau lagging, kev sib koom ua ke lossis ua los ntawm kev sib txawv ntawm qhov excitation, whereas, induction motor ib txwm khiav ntawm lagging fais fab tuag.
Synchronous motors feem ntau ua tau zoo dua li induction motors.
Synchronous motors yog costlier.