Tsav kev txawj ntse
16. Lub tshuab transformer yog sib npaug rau qhov lem ratio ntawm thawj qhov sib tw mus rau lwm yam kev sib tw. Qhov piv ntawm cov theem ib zaug no kuj tuaj yeem hais tau raws li qhov sib piv ntawm cov ntsuas ntawm cov thawj thiab theem ob sab.
17. Thaum lub caij nyoog zoo, qhov sib npaug ntawm cov hluav taws xob synchronous yog sib npaug 1; ua kom cov zis kom muaj zog, yog li ntawd qhov kev cia siab tam sim no tsawg dua qhov kev cia siab (tsis meej), ces qhov ntawm qhov kev ua haujlwm ncaj nraim yog qhov pab tau magnetically; Thaum lub sijhawm tam sim no siab tshaj qhov kev cia siab (overexcitation), qhov tshwm sim ntawm qhov kev sib tw ntawm txoj kab ncaj nraim yog qhov tseeb.
18. Hauv DC motors, qhov hlau poob yog tshwm sim rau cov tub ntxhais kawm rotor (khab tub ntxhais) vim hais tias stator core magnetic field yog tseem tsis tau hloov.
19. Nyob hauv DC tsav, lub suab thawj y1 yog sib npaug rau cov npoo ntawm sab xub thawj thiab sab thib ob ntawm kev tivthaiv. Lub suab ntawm y yog sib npaug ntawm cov npoo ntawm ob sab ntawm ob kab hauv koob.
20. Nyob rau hauv DC motor, thaum tsis saturation, tsis yog qhov kev sib tsoo ntawm qhov kev sib tsoo armature tshwm sim los ntawm kev hloov ntawm txoj hauj lwm ntawm qhov chaw ntawm magnetic mus xoom, tab sis qhov sib nqus flux ib ncej tsis hloov. Thaum txhuam yog nyob rau nruab nrab ntawm lub nruab deg, qhov tshwm sim hauv nruab nrab yog nqus hlau.
21. Hauv kev sib tw ncaj qha tam sim no, ib qho uas hloov mus rau sab nraud tam sim tam sim no yog tus kws muag khoom. Lub hom phiaj ntawm tus neeg muag khoom yog los hloov DC rau AC (lossis lwm tus qauv).
22. Nyob rau hauv lub tshuab synchronous, thaum lub teb F0 ntawm qhov stator winding ntawm qhov siab tshaj tus nqi, sab nraum E0 nce tus nqi qis kawg. Thaum F0 ncav zero, E0 nce mus txog qhov siab tshaj plaws, thiab theem F0 thiab E0. Kev sib raug zoo yog F0 ua ntej E090o. Thiab qhov qhia tawm ntawm E0 thiab F0 yog: E0 = 4.44fNkN1F0.
23. Hauv kev tsav tsheb, cov dej ntws tawm yog hais txog qhov sib tsoo ntawm qhov sib tw xwb, thiab lub tshuab hluav taws xob rov tom qab tau ua rau sib txawv ntawm qhov poob siab (los sis tsis zoo).
24. Asynous motor rotors yog: - nas cage, winding hom thiab hais txog.
25. Cov ntawv cog lus ntawm lub cav asynchronous txhais tias qhov sib txawv ntawm qhov sib txawv ntawm qhov kev sib hloov ntawm synchronous thiab lub rotor ceev mus rau qhov kev sib hloov synchronous. Thaum lub asynchronous lub cev ua haujlwm nyob rau hauv lub cev muaj zog, nws cov av nkos tus s ranges ntawm 1> s> 0.
26. Qhov kev sib raug zoo ntawm lub tshuab hluav taws xob ntawm Asynchronous thiab tus nqi qiv s Muaj peb lub ntsiab tseem ceeb ntawm qhov kev hloov ntawm Tem-s, uas yog qhov pib taw qhia (s = 1), qhov siab tshaj plaws ntawm qhov sib tw electromagnetic torque (s = sm) , thiab qhov sib npaug ntawm qhov sib piv (s = 0). Thaum lub rotor tsis kam ntawm lub asynchronous lub cev hloov, qhov ntau ntawm lub siab tshaj plaws ntawm electromagnetic torque Tem thiab tus nqi npleem sm yog tsiag ntawv los ntawm tib qho loj thiab qhov hloov txoj haujlwm.
27. Asynchronous motors yuav tsum tau nqus cov zis ntawm lub zog ntawm cov hluav taws xob los ntawm kab sib chaws rau excitation.
28. Lub rooj sib txig sib xyaw ua ke yog lub zog nrog rau kev hloov tam sim no, thiab nws lub zog muaj hlau nplaum muaj qhov chaw muaj mem tes-kev vam nrog lub sijhawm. Ib zaug xwb kauj txuas mus rau ib qho kev hloov tam sim no, thiab nws lub zog ntawm cov hlau nplaum kuj muaj lub plhom-kev vam meej nrog lub sijhawm.
29. Thaum lub tshuab synchronous txuas nrog rau kab sib chaws, qhov peb theem ntawm qhov hluav taws xob yuav tsum muaj tib lub qhov hluav taws xob li cov kab theem peb theem: qhov ntev, qhov siab, kev ua duab, theem sib (thiab theem).
30. Lub rotor ntawm lub tshuab synchronous muaj ob hom: zais ncej thiab tus ncej.
