Taw qhia
Txhuam DC motors tau siv ntau xyoo thiab tseem yog qhov kev xaiv nrov hauv ntau daim ntawv thov, xws li cov neeg hlau, cov cuab yeej hluav taws xob, thiab cov khoom siv tsheb. Cov motors no muaj cov qauv tsim yooj yim, yooj yim los tswj, thiab pheej yig. Txawm li cas los xij, lawv kuj muaj ntau qhov tsis zoo uas txwv lawv qhov kev ua tau zoo thiab xav tau kev saib xyuas tas li. Hauv tsab xov xwm no, peb yuav tshawb txog qhov tsis zoo ntawm txhuam DC motors thiab lawv cov kev cuam tshuam rau ntau yam kev siv.
Disadvantage #1: txwv lifespan
Ib qho ntawm cov teeb meem loj ntawm txhuam DC lub cev muaj zog yog lawv lub neej kev txwv. Cov txhuam hniav thiab commutator yog cov khoom tseem ceeb uas txiav txim siab seb lub cev muaj zog yuav kav ntev npaum li cas. Cov txhuam hniav yog ua los ntawm cov pa roj carbon graphite thiab hnav dhau lub sijhawm vim muaj kev sib txhuam thiab cua sov tsim thaum lub sijhawm ua haujlwm. Lub commutator, uas yog lub luag haujlwm rau kev hloov pauv tam sim no hauv lub cev muaj zog, kuj hnav thiab ua tsis sib xws, ua rau muaj zog tiv thaiv thiab txo kev ua haujlwm.
Yog li ntawd, txhuam DC motors feem ntau muaj lub neej luv dua piv rau lwm hom motors. Lub neej ntev tuaj yeem sib txawv nyob ntawm qhov zoo ntawm lub cev muaj zog, kev ua haujlwm, thiab kev saib xyuas. Feem ntau, txhuam DC lub cev muaj zog tuaj yeem nyob qhov twg los ntawm ob peb puas mus rau ob peb txhiab teev ua haujlwm.
Disadvantage #2: Kev tu
Lwm qhov tsis zoo ntawm txhuam DC motors yog kev saib xyuas yuav tsum tau ua kom lawv khiav zoo. Raws li tau hais ua ntej, cov txhuam hniav thiab cov commutator hnav dhau lub sijhawm thiab yuav tsum tau hloov lub sijhawm. Qhov no yuav tsum tau disassembled lub cev muaj zog, tshem tawm cov qub txhuam, thiab hloov lawv nrog cov tshiab.
Ntxiv nrog rau kev hloov txhuam hniav, lub cev muaj zog kuj yuav tsum tau ntxuav kom tsis tu ncua kom tsis txhob muaj plua plav thiab cov khib nyiab los ntawm kev sib sau rau hauv. Qhov no tuaj yeem yog cov txheej txheem nyuaj thiab siv sijhawm, tshwj xeeb tshaj yog rau cov motors uas tau siv ntau zaus los yog nyob rau hauv ib puag ncig hnyav.
Disadvantage #3: Electromagnetic cuam tshuam
Txhuam DC lub cev muaj zog tsim hluav taws xob cuam tshuam loj (EMI) thaum ua haujlwm. Qhov no tuaj yeem ua rau muaj kev cuam tshuam nrog lwm cov khoom siv hluav taws xob thiab cov tshuab hauv ib puag ncig, ua rau muaj teeb meem kev ua haujlwm thiab muaj peev xwm muaj kev nyab xeeb.
Txhawm rau txo EMI, kev tiv thaiv ntxiv thiab lim cov khoom feem ntau yuav tsum tau muaj nyob rau hauv lub cev muaj zog thiab cov khoom nyob ib puag ncig. Qhov no ntxiv complexity thiab nqi rau tag nrho cov system tsim.
Disadvantage #4: txwv ceev thiab torque tswj
Txhuam DC motors muaj kev txwv ceev thiab torque tswj piv rau lwm hom motors. Qhov ceev ntawm txhuam DC lub cev muaj zog yog txiav txim siab los ntawm qhov hluav taws xob siv rau lub cev muaj zog, uas yog qhov nyuaj rau kev tswj hwm qhov tseeb. Tsis tas li ntawd, torque tso zis ntawm txhuam DC lub cev muaj zog yog proportional rau qhov tam sim no ntws los ntawm nws, uas yog ib qho nyuaj rau tswj kom meej.
Qhov no tuaj yeem txwv qhov kev ua tau zoo thiab kev ua haujlwm ntawm cov ntawv thov uas yuav tsum tau ceev ceev lossis tswj lub zog, xws li cov neeg hlau, CNC tshuab, thiab tsheb fais fab.
Disadvantage #5: Txhuam sparking thiab hnav
Txhuam DC lub cev muaj zog ua kom muaj qhov sib txawv ntawm cov txhuam hniav thiab cov commutator thaum ua haujlwm. Qhov no tuaj yeem ua rau arcing thiab yaig ntawm qhov chaw sib cuag, ua rau muaj zog tiv thaiv thiab txo kev ua haujlwm.
Txhawm rau txo qis qis, cov khoom siv hluav taws xob qis dua yog siv rau cov txhuam hniav thiab commutator. Txawm li cas los xij, qhov no tuaj yeem ua rau muaj kev hnav thiab luv luv ntawm cov khoom siv no.
Tsis tas li ntawd, qhov hluav taws xob tuaj yeem tsim hluav taws xob nrov, uas tuaj yeem cuam tshuam nrog lwm yam khoom siv hluav taws xob thiab tshuab.
Disadvantage #6: Tsawg efficiency
Txhuam DC motors muaj kev ua haujlwm qis dua piv rau lwm hom motors, tshwj xeeb tshaj yog nyob rau qis qis. Qhov no yog vim muaj kev sib txhuam thiab cua sov tsim los ntawm cov txhuam hniav thiab commutator thaum ua haujlwm.
Kev ua haujlwm qis dua tuaj yeem ua rau muaj kev siv zog ntau ntxiv thiab txo cov roj teeb lub neej hauv cov ntawv thov xws li tsheb hluav taws xob lossis mobile robots.
Xaus
Hauv kev xaus, txhuam DC motors muaj ob peb qhov tsis zoo uas txwv tsis pub lawv ua haujlwm thiab yuav tsum tau saib xyuas tsis tu ncua. Cov kev tsis zoo no suav nrog kev ua neej tsawg, kev saib xyuas, kev cuam tshuam ntawm electromagnetic, txwv ceev thiab torque tswj, txhuam sparking thiab hnav, thiab kev ua haujlwm tsawg.
Txawm hais tias cov kev txwv no, txhuam DC motors txuas ntxiv siv rau hauv ntau daim ntawv thov vim lawv cov qauv yooj yim, tswj tau yooj yim, thiab tus nqi qis. Txawm li cas los xij, raws li kev siv thev naus laus zis thiab kev xaiv lub cev muaj zog ntau dua thiab txhim khu kev qha, kev siv txhuam DC lub cev muaj zog tuaj yeem txo qis hauv qee yam kev siv.