Peb-theem asynchronous motorsyog qhov peb feem ntau hu ua AC motors
Qhov yuav tsum tau ua ua ntej rau kev sib hloov ntawm peb-theem asynchronous motors yog kom muaj qhov sib nqus sib nqus. Lub stator windings ntawm peb-theem asynchronous motors yog siv los tsim cov rotating magnetic teb. Raws li peb txhua tus paub, theem-rau-theem voltages ntawm theem sib txawv los ntawm 120 degrees, thiab spatial cov lus qhia ntawm peb windings ntawm stator ntawm peb-theem asynchronous lub cev muaj zog kuj txawv ntawm 120 degrees. Nyob rau hauv txoj kev no, thaum lub stator winding hla, thaum peb-theem fais fab mov yog qhib, lub stator winding generates ib rotating magnetic teb.
Lub rotating magnetic teb rotates ib zaug nyob rau hauv qhov chaw thaum tam sim no hloov ib zaug ib lub voj voog. Hauv lwm lo lus, qhov kev sib hloov ceev ntawm lub rotating magnetic teb yog synchronized nrog cov kev hloov hauv tam sim no. Kev sib hloov ceev ntawm rotating magnetic teb yog raws li nram no. n = 60f / P Ntawm no, f yog lub hwj chim zaus, P yog tus naj npawb ntawm cov ncej ntawm cov hlau nplaum, thiab chav tsev ntawm n yog tus naj npawb ntawm kev sib hloov ib feeb. Raws li cov qauv no, qhov ceev ntawm lub cev muaj feem cuam tshuam nrog qhov zaus ntawm cov ncej hlau nplaum thiab qhov zaus ntawm cov khoom siv hluav taws xob.
Lub winding ntawm ib theempeb-theem asynchronous lub cev muaj zogyog 1, thiab lub rotor yog nyob rau hauv cov duab ntawm ib tug sedan. Thaum ib-theem sinusoidal tam sim no dhau los ntawm stator winding, lub cev muaj zog tsim AC magnetic teb. Qhov kev siv thiab kev taw qhia ntawm qhov chaw sib nqus no hloov pauv sinusoidally dhau sijhawm, tab sis vim tias nws tau ruaj khov hauv qhov chaw, qhov chaw sib nqus no tseem hu ua kev sib tham sib pulsating magnetic teb. Qhov kev sib tham sib pulsating magnetic teb no yuav decomposed rau hauv ob rotating magnetic teb nrog tib ceev thiab opposite rotation cov lus qhia. Thaum lub rotor nyob ruaj ruaj, ob qhov sib nqus sib nqus ua kom muaj ob lub zog hauv lub rotor, uas yog tiaj thiab rov qab rau hauv kev taw qhia, yog li lub zog torque yog 0 thaum lawv tsim, yog li lub cev tsis tuaj yeem tig.
Thaum lub zog sab nraud yog siv los tig lubpeb-theem induction ac lub cev muaj zognyob rau hauv ib qho kev taw qhia tshwj xeeb (clockwise kev sib hloov, thiab lwm yam), lub zog ntawm lub txiav magnetic teb ntawm lub rotating magnetic teb thiab rotating magnetic teb nyob rau hauv lub clockwise kev taw qhia yuav me me. Qhov kev txav ntawm cov kab sib nqus ntawm lub zog txiav ntawm lub rotating magnetic teb thiab counterclockwise rotating magnetic teb yuav loj dua. Nyob rau hauv txoj kev no, qhov nyiaj tshuav poob, tag nrho cov hluav taws xob hluav taws xob torque tsim los ntawm rotor yuav tsis yog xoom, thiab lub rotor yuav tig mus rau hauv cov kev taw qhia propulsion.