VAC hauv hluav taws xob engineering yog dab tsi?
Txheem
Koj puas xav paub dab tsi cov ntawv luv VAC sawv cev rau hauv cov lus hluav taws xob? Kuv yog ib tus kws tshaj lij hluav taws xob muaj ntawv pov thawj thiab kuv yuav hais txog qhov no kom ntxaws hauv kab lus luv luv hauv qab no.
Koj tuaj yeem pom 110VAC lossis 120VAC sau rau ntawm cov khoom siv hluav taws xob feem ntau.
Feem ntau, VAC tsuas yog ib lo lus siv hauv hluav taws xob engineering rau AC volts. Tej zaum koj yuav paub txog DC volts; nws yog DC voltage. Ib yam li ntawd, VAC sawv cev rau AC voltage. Qhov tsuas yog qhov koj yuav tsum paub yog tias ob qho tib si VDC thiab VAC sawv cev voltages.
Mus nyeem ntawv kom paub meej ntxiv.
Txhua yam koj yuav tsum paub txog VAC
Ntau lub xeev hauv North America siv 110 lossis 120 VAC. Thiab koj tuaj yeem pom cov cim no ntawm qee cov khoom siv hluav taws xob xws li khoos phis tawj, transformers tam sim no, thiab digital multimeters. Tab sis koj puas paub nws lub ntsiab lus?
VAC yog lo lus siv los xa mus rau AC volts. Yog li tsis muaj qhov zoo li AC fais fab. Nws tsuas yog AC Circuit Court voltage.
Txawm li cas los xij, txhawm rau ua kom raug, koj yuav tsum nkag siab qhov txawv ntawm VAC thiab VDC.
VDC thiab VAC yog dab tsi?
Ua ntej, koj yuav tsum paub txog DC thiab AC txhawm rau nkag siab ob nqe lus no.
Direct tam sim no (DC)
DC lub zog ntws los ntawm qhov tsis zoo mus rau qhov zoo kawg. Qhov no ntws yog unidirectional, thiab lub tsheb roj teeb yog ib qho piv txwv tseem ceeb.
Hloov tam sim no (AC)
Tsis zoo li DC, AC lub zog ntws los ntawm ob sab. Piv txwv li, hauv ib qho thib ob, AC fais fab hloov ntawm qhov tsis zoo mus rau qhov zoo thiab los ntawm qhov zoo mus rau qhov tsis zoo. Lub zog tseem ceeb uas tuaj rau hauv koj lub tsev yog qhov piv txwv zoo tshaj plaws ntawm AC fais fab.
V DC thiab AC
Yog tias koj nkag siab meej txog AC thiab DC lub zog, koj tsis muaj dab tsi los nkag siab txog VDC thiab VAC.
Ntawm no yog ib qho yooj yim piav qhia.
VDC sawv cev rau DC voltage tus nqi thiab VAC sawv cev rau AC voltage tus nqi. Yog tias koj siv lub tshuab hluav taws xob digital thiab tshuaj xyuas kom zoo, koj tuaj yeem pom ob qho ntawm cov cim no. Txawm li cas los xij, yog tias koj xav siv cov kev teeb tsa no ntawm lub tshuab hluav taws xob, koj yuav tsum paub cov circuits twg ua haujlwm nrog DC voltage thiab cov circuits twg nrog AC voltage.
Kuv tuaj yeem nrhiav VAC nyob qhov twg?
Feem ntau thaj chaw ntawm North America siv 110 lossis 120 VAC rau cov tsev neeg ib txwm muaj. Koj tuaj yeem pom qhov cim no ntawm AC cov khoom siv. Txawm li cas los xij, thaum nws los rau Tebchaws Europe lawv siv 220VAC lossis 240VAC.
Ceev Ntsis: 120 V AC muab hluav taws xob sib txawv ntawm 170 V rau xoom. Tom qab ntawd nws nce mus rau 170V. Piv txwv li, alternating tam sim no rov ua dua 60 zaug hauv ib thib ob. Qhov no yog vim li cas feem ntau AC qhov chaw yog 60Hz.
RMS voltage 120V AC
Qhov tseeb, 120V AC hloov mus rau 170V thiab poob rau xoom. Qhov no sine yoj sib npaug 120 volts DC thiab hu ua RMS.
Yuav xam RMS tus nqi li cas?
Ntawm no yog cov qauv rau xam RMS.
VRMS V = tauncov*1/√2
Peak voltage 170V.
Yog li ntawd
VRMS Luas = 170 * 1/√2
VRMS = 120.21 V
Vim li cas peb thiaj siv VAC?
Koj yuav poob qee lub zog txhua zaus koj sim hloov lub zog ntawm ib daim ntawv mus rau lwm qhov. Yog li ntawd, txhawm rau txo qhov poob ntawm lub zog no, cov tshuab hluav taws xob tsim hluav taws xob ntawm qhov hluav taws xob siab thiab xa mus rau hauv daim ntawv ntawm kev hloov tam sim no.
Txawm li cas los xij, cov tsev neeg zoo tib yam tsis xav tau hluav taws xob siab. Vim li no, AC hluav taws xob dhau los ntawm lub kauj ruam-down transformer thiab tsim hluav taws xob qis rau kev siv hauv tsev.
tseem ceeb: Cov khoom siv hluav taws xob feem ntau tsis khiav ntawm AC fais fab. Hloov chaw, lawv siv cov hluav taws xob tsawg DC fais fab. Yog li ntawd, tsis tshua muaj hluav taws xob AC lub zog hloov mus rau qhov tsis tshua muaj hluav taws xob DC lub zog los ntawm tus choj rectifier.
Ua tib zoo saib qee qhov ntawm peb cov lus hauv qab no.
- Teeb lub multimeter rau lub tsheb roj teeb
- Voltage drop test generator
- Yuav ua li cas kuaj lub tsheb roj teeb nrog multimeter
Video txuas
