Cov txheej txheem los txhim kho kev sib hloov ntawm DC motors

Feem ntau yog cov hauv qab no los txhim kho kev sib hloov ntawm DC lub cev muaj zog:

1. Nruab tus ncej commutator

Tam sim no, txoj hauv kev zoo yog txhawm rau txhim kho commutator ncej. Txhawm rau tshem tawm qhov tsis zoo ntawm qhov cuam tshuam ntawm lub zog hluav taws xob thiab txiav tawm lub zog hluav taws xob hauv lub tshuab hluav taws xob, lub commutation ncej yog saws, thiab cov tub ntxhais sib nqus hu ua commutation ncej magnetic core. Cov kev taw qhia ncej txuas nrog rau hauv series nrog armature winding, lub armature tam sim no zoo siab, thiab cov kev taw qhia ntawm lub magnetic ncej yog thim rov qab los tsim cov magnetomotive quab yuam opposite rau armature. Ntxiv nrog rau kev kov yeej lub armature cov tshuaj tiv thaiv magnetomotive quab yuam, nws kuj tau tsim nyob rau hauv qhov sib txawv ntawm cov huab cua qhov chaw nyob rau hauv lub commutation element. Sib nqus teb Bk. Lub commutation element txiav tawm Bk thiab tsim kom muaj kev sib hloov electromotive force Ek. Cov kev taw qhia ntawm Ek yog rov qab rau cov kev taw qhia ntawm Er+Ea los cuam tshuam cov txiaj ntsig ntawm Er+Ea thiab txhim kho kev sib hloov ua haujlwm.

Txij li Er+Ea yog proportional rau lub armature tam sim no, lub commutation ncej magnetic teb uas generates Ek yuav tsum proportional rau armature tam sim no. Yog li ntawd, lub commutation winding yog txuas nrog nyob rau hauv series nrog armature winding, thiab lub commutation magnetic circuit yuav tsum tsis txhob saturated. Txhawm rau kom tswj tau qhov tsis txaus ntseeg ntawm commutator sib nqus Circuit Court, tsis yog-magnetic hloov phaj ntawm qhov tsim nyog thickness feem ntau yog ntxig rau ntawm tus quab thiab commutator ncej core.

Tam sim no, DC motors siab tshaj 1kW yog nruab nrog commutator ncej.

2. Xaiv tus txhuam hniav zoo

Muaj kev tiv thaiv kev sib cuag ntawm tus txhuam hniav thiab cov commutator, uas tuaj yeem txo qhov tam sim no ntxiv thiab txhim kho kev ua haujlwm ntawm commutator. DC motors tsis siv cov txhuam hlau uas tsis tshua muaj kev sib cuag, tab sis siv cov txhuam hniav thiab graphite txhuam. Txawm li cas los xij, koj tsis tuaj yeem xaiv tus txhuam hniav uas muaj kev tiv thaiv loj ntawm qhov xav tau, txwv tsis pub qhov kev sib cuag voltage poob ntawm tus txhuam thiab lub commutator yuav nce, lub commutator yuav ua kom sov ntau dua thiab lub zog poob yuav ntau dua.

3. Kev them nyiaj yug winding

Lub commutator ncej kov yeej cov kev cuam tshuam ntawm armature cov tshuaj tiv thaiv magnetic teb qhov twg lub commutator caij nyob, thiab armature cov tshuaj tiv thaiv tshaj qhov point no tseem muaj. Yog tias cov nyhuv no muaj zog, qhov sib nqus flux ntawm ob sab ntawm cov ncej hlau nplaum yuav muaj qhov sib txawv. Yog tias nqus tau flux ntom ntom ntom ntawm daim ncej daim Thaum lub sij hawm no, cov nyiaj them winding yog teem nyob rau hauv series nrog armature winding ntawm tus ncej ncej ntawm lub ntsiab magnetic ncej, thiab lub armature tam sim no ntws los ntawm cov nyiaj them winding, uas muaj peev xwm tshem tawm tag nrho cov armature cov tshuaj tiv thaiv. Kev them nyiaj windings tsuas yog siv rau DC motors loj.

4. Txav txhuam txoj hauj lwm

Nyob rau hauv lub me me-tswj DC lub cev muaj zog tsis muaj commutator ncej, tus txhuam yuav txav tau ntawm ib lub kaum sab xis ntawm lub geometric nruab nrab los txhim kho commutation. Rau cov tshuab hluav taws xob, cov txhuam hniav txav raws lub armature, rau cov motors, cov txhuam hniav txav raws li armature. Yog li ntawd, lub commutation caij tawm ntawm geometric nruab nrab kab thiab nkag mus rau hauv lub ntsiab magnetic ncej. Lub ntsiab sib nqus ncej yog siv los hloov lub directional magnetic ncej, lub induced electromotive quab yuam EF thiab ER yog sib npaug zos nyob rau hauv loj, opposite nyob rau hauv kev coj, thiab kev sib nrig sib rho, thiaj li mus cuag lub hom phiaj ntawm kev txhim kho commutation.

Qhov tsis zoo ntawm txoj kev no yog tias tom qab txhuam tawm ntawm kab geometric nruab nrab, qhov ncaj-axis armature magnetomotive quab yuam uas demagnetizes lub ntsiab magnetic teb yuav raug generated. Qhov thib ob, vim tias ER hloov pauv nrog qhov loj ntawm lub thauj khoom, EF kuj tseem yuav hloov nrog qhov loj ntawm lub thauj khoom, uas yuav tsum tau txav lub kaum sab xis ntawm lub txhuam kom hloov nrog qhov loj ntawm lub load, uas yog tsis yooj yim sua. Yog li ntawd, txoj kev no tsuas yog tsim nyog rau cov motors nrog kev hloov pauv me me.

Cov kev soj ntsuam saum toj no yog ua raws li kev sib cuag ntawm lub commutator nto thiab txhuam. Txawm li cas los xij, qhov tseeb saum npoo ntawm commutator yog ib txwm tsis tuaj yeem ua puag ncig thiab plua plav. Cov txhuam hniav ntawm lub high-ceev DC lub cev muaj zog tseem muaj bounce, tshwj xeeb tshaj yog kev vibration ntawm railway motor nws tus kheej. Nyob rau hauv cov sij hawm no, feem ntau nws yog tsim nyog los tsim ib tug loj commutator electromotive quab yuam. Lub DC lub cev muaj zog nrog kev hloov pauv ntawm qhov hnyav yuav tsum tau tsim kom muaj kev sib hloov loj dua electromotive quab yuam.