Cov ntsiab lus tseem ceeb uas xav tau rau kev xaiv lub cev muaj xws li: hom kev thauj khoom uas yuav tsum tau tsav, ntsuas lub zog, ntsuas qhov ntsuas hluav taws xob, thiab ntsuas nrawm.
Qhov kom zoo dua ntawm DC lub cev muaj zog uas tsim los ntawm Sima Motor Factory yog tias nws tuaj yeem kho qhov nrawm los ntawm kev hloov qhov voltage thiab tuaj yeem muab lub zog loj dua. Nws yog qhov tsim nyog rau kev thauj khoom uas yuav tsum tau kho qhov ceev tsis tu ncua, xws li dov mills hauv steel mills, hoists hauv mines, thiab lwm yam. Tab sis tam sim no nrog kev txhim kho ntawm zaus hloov tshuab, AC motors kuj tuaj yeem kho qhov ceev los ntawm kev hloov zaus. Txawm li cas los xij, txawm hais tias tus nqi sib txawv ntawm cov motors tsis tshua kim dua li cov motors zoo tib yam, tus nqi ntawm cov zaus hloov pauv tau nyob hauv qhov tseem ceeb ntawm tag nrho cov khoom siv, yog li muaj lwm qhov zoo ntawm DC motors uas lawv pheej yig.
Lub shortcoming ntawm lub ndlwg lub cev muaj zog yog hais tias tus qauv yog complex, txhua yam khoom raws li ntev raws li cov qauv yog complex, yuav inevitably ua rau ib tug nce nyob rau hauv tus nqi tsis ua hauj lwm. Piv nrog AC motors, DC motors muaj qhov nyuaj windings (excitation windings, commutating ncej windings, them nyiaj windings, armature windings), tab sis kuj ntxiv rings plam, txhuam thiab commutators. Tsis tsuas yog cov chaw tsim khoom' cov txheej txheem yuav tsum muaj siab, tab sis cov nqi kho tom qab kuj tseem siab. Yog li ntawd, DC motors yog nyob rau hauv ib qho teeb meem txaj muag nyob rau hauv kev lag luam daim ntaub ntawv uas lawv maj mam poob tab sis tseem muaj txiaj ntsim nyob rau hauv lub sij hawm hloov.
Feem ntau hais lus, lub cev muaj zog tuaj yeem txiav txim siab los ntawm kev muab hom kev thauj khoom uas tau tsav, ntsuas lub zog ntawm lub cev muaj zog, ntsuas qhov ntsuas hluav taws xob, thiab ntsuas nrawm. Tab sis yog tias cov kev xav tau ntawm kev thauj khoom yuav tsum tau ua kom zoo, cov kev ntsuas no tseem nyob deb ntawm qhov txaus. Cov kev txwv uas yuav tsum tau muab suav nrog: zaus, kev ua haujlwm, kev xav tau ntau dhau, qib rwb thaiv tsev, qib kev tiv thaiv, lub sijhawm ntawm inertia, load tsis kam torque nkhaus, txoj kev teeb tsa, ambient kub, qhov siab, qhov xav tau sab nraum zoov, thiab lwm yam. rau tej yam kev mob.
Txawm hais tias DC motors tsis zoo rau kev ua haujlwm siab thiab txuag hluav taws xob tsim niaj hnub no hais txog kev txuag hluav taws xob thiab kev tiv thaiv ib puag ncig, ntau lub tuam txhab loj hauv lub xeev tseem siv dav vim yog cov theem pib ntawm kev lag luam.
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