Switching tswj fais fab mov yuav ua li cas kom tsis txhob cuam tshuam
Kev hloov hluav taws xob tswj hluav taws xob (stabilized voltage mov) yog ib qho khoom siv hluav taws xob uas tuaj yeem muab cov khoom siv hluav taws xob ruaj khov AC lossis DC rau lub nra, suav nrog AC tswj fais fab mov thiab DC tswj fais fab mov ob pawg. Thaum cov kab hluav taws xob hluav taws xob lossis thauj khoom tam sim no hloov pauv, cov khoom siv hluav taws xob ruaj khov yuav yog 10-30ms teb ceev los them rau qhov voltage amplitude, kom nws ruaj khov nyob rau hauv ± 2%.
Switching tswj fais fab mov yog ib yam tshiab ntawm lub hwj chim mov. Nws muaj qhov zoo ntawm kev ua haujlwm siab, lub teeb yuag, nce qib thiab qib qis qis, thiab lub zog tso zis siab. Tab sis vim hais tias lub Circuit Court ua hauj lwm nyob rau hauv lub switching xeev, nws kuj yog nrov. Nrog rau daim duab hauv qab no, cia peb tham luv luv txog lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm puck switching fais fab mov. Raws li pom nyob rau hauv daim duab, lub Circuit Court muaj ib tug hloov K (qhov tseeb Circuit Court rau lub transistor los yog field effect raj), lub continuity diode D, lub zog cia inductance L, lim capacitor C thiab hais txog. Thaum lub kaw lus kaw, lub zog hluav taws xob los ntawm kev hloov K, inductor L mus rau lub zog thauj khoom, thiab ib feem ntawm lub zog hluav taws xob khaws cia hauv inductor L thiab capacitor C.
Switching regulator fais fab mov ua hauj lwm switching transistor thiab tam sim no diode (tuaj yeem yog lwm lub transistor hloov) yog ib txwm hloov los yog tawm, KQ thiab KD tsis yog ib qho khoom siv zoo tagnrho, ob lub xeev hloov pauv yuav tsum muaj qee lub sijhawm, uas ua rau muaj kev cuam tshuam loj heev. . Thaum lub sijhawm hloov pauv hauv lub xeev, qhov kev hloov pauv uas nyob rau hauv tsis yog tag nrho, thaum lub qhov hloov pauv uas tsis tau tawm rau ib pliag, muaj txoj hauv kev ncaj qha los ntawm lub zog hluav taws xob mus rau hauv av, tsim ib qho kev hloov pauv tam sim no. Qhov tam sim no muaj feem xyuam rau qhov sib txawv ntawm qhov hloov pauv triode lub sijhawm tam sim no Imax thiab nws lub sijhawm tam sim no Icmin, thiab rau lub sijhawm ntawm kev hloov pauv ib txhij ntawm KQ thiab KD, thiab lwm yam. Vim muaj kev cuam tshuam ntawm cov kev faib hluav taws xob hauv Circuit Court, ringing oscillations tshwm nyob rau hauv lub waveform.
Lub switching regulator fais fab mov ua hauj lwm los ntawm radiating cuam tshuam rau hauv qhov chaw. Lub suab nrov ntawm hluav taws xob yog inversely proportional rau qhov kev ncua deb ntawm qhov chaw hluav taws xob. Dav dav ntawm 5cm deb ntawm cov xaim tuaj yeem ua tau. Yog tias tus qauv tsis tso cai, nws yuav tsum tau thaiv. Fais fab input kab nyob ib ncig ntawm lub zog electromagnetic teb, thiaj li yuav txo tau cov electromagnetic coupling ntawm cov input kab thiab cov zis kab, ob yuav tsum nyob deb.
