Kev txhim kho ntawm cov khoom siv hluav taws xob mus rau ntau qhov kev qhia: txo qis, txhim kho lawv cov thev naus laus zis tsim khoom, qhov tshwm sim ntawm kev tsim kho tshiab, thiab lwm yam. Tag nrho cov lus qhia no tau pom zoo nrog kev npaj siv cov cuab yeej siv hauv ntau qhov chaw. Nyob rau tib lub sijhawm, kev daws teeb meem hauv Circuit Court thiab cov thev naus laus zis tshiab tshwm sim uas txhim kho kev ua haujlwm ntawm cov khoom siv hluav taws xob. Ib qho ntawm cov khoom siv no tuaj yeem raug hu ua PWM maub los. Qhov no yog ib qho khoom siv me me, uas feem ntau yog siv hauv cov khoom siv hluav taws xob ntawm ntau lub peev xwm. Nws siv txoj kev hloov pauv hluav taws xob thiab ua haujlwm zoo ob qho tib si hauv ntau yam khoom siv hauv tsev thiab hauv kev tsim khoom.
Modern PWM maub los muaj kev kub ceev thiab siv, piv txwv li, hloov cov khoom siv hluav taws xob. Lub hauv paus ntsiab lus ntawm nws txoj haujlwm yog qhov yooj yim heev, nws hloov pauv qhov tsis tu ncua mus rau hauv cov duab plaub ntawm lub voj voog thiab zaus. Cov pulses no tsav lub zog transistor-raws li tso zis module. Qhov no tso cai rau siv ib tug yooj yim circuit kom tau ib tug adjustable voltage qhov chaw. Qhov no yog qhov tseem ceeb rau cov khoom siv hluav taws xob, qhov loj meqhov tseem ceeb. PWM maub los ua rau nws muaj peev xwm tsim cov khoom siv hluav taws xob sib txuas: laptops, computers, TVs, thiab lwm yam.
Nrog nws, koj tuaj yeem siv ntau yam kev daws teeb meem rau kev tswj qhov ceev ntawm lub tshuab hluav taws xob. Kev tawm tswv yim hauv qhov no tuaj yeem ua tiav raws li ntau yam tsis muaj - tam sim no lossis voltage, uas cuam tshuam txog lub xeev ntawm cov khoom tswj. Nws tuaj yeem yog linear lossis angular ceev, lub cev muaj zog emf, kub sensor teeb liab, thiab lwm yam. Nyob ntawm qhov xwm txheej thiab cov teeb liab hais kom ua, PWM maub los yuav nce lossis txo qhov ceev ntawm lub cev muaj zog. Ib qho piv txwv zoo ntawm kev siv cov cuab yeej no hauv kev tsim khoom yog qhov hloov pauv zaus.
Hauv cov khoom siv hauv tsev, TL494 PWM maub los feem ntau yog siv, uas tau ua pov thawj nws tus kheej zoo hauv kev ua haujlwm. Lub microcircuit muaj ib tug built-in zaus generator. Qhov no muab nws ib qho kev ywj pheej ntawm sab nraud cov cim. Ib- lossis ob-mob stroke ntawm kev ua haujlwm tso cai rau koj ib txhij tau txais cov lus qhia ncaj qha thiab thim rov qab ntawm cov zis, uas tuaj yeem siv rau kev hloov pauv ntxiv. Nyob rau hauv dav dav, nws cov hauj lwm yog optimized rau siv nyob rau hauv switching fais fab mov. Tus naj npawb ntawm inputs / outputs ua tau raws li qhov yuav tsum tau muaj ntawm cov khoom siv uas twb tau tsim los siv nws.
Dhau li ntawm cov qauv hluav taws xob, PWM cov tswj tau hnyav siv hauv kev tsim cov khoom siv tshiab. Qee qhov ntawm lawv, feem ntau yuav, sai sai no yuav pib siv rau ntawm kev lag luam. Nrog lawv cov kev pab, nws yog ib qho yooj yim mus sau ib lub tswv yim tswj uastuaj yeem ua haujlwm hauv ntau qhov chaw.
Nrog rau kev tsim cov thev naus laus zis rau cov khoom siv no, peb tuaj yeem hais tias dhau sijhawm, cov cuab yeej siv ceev ceev yuav tshwm sim uas ua raws li cov lus piav qhia saum toj no ntawm kev ua haujlwm. Qhov no yuav tso cai rau kev txhim kho ntawm cov tswj nrog cov yam ntxwv zoo. Cov khoom siv zoo li no tuaj yeem sib tw nrog lawv cov analog lossis digital "rivals" thiab siv rau hauv hluav taws xob tswj circuits.
