Yuav ua li cas kom tsis txhob cuam tshuam nrog kev hloov cov khoom siv fais fab
Kev hloov hluav taws xob tswj hluav taws xob (stabilized voltage mov) muaj peev xwm muab AC lossis DC lub zog ruaj khov rau cov khoom siv hluav taws xob, 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 hloov pauv sai, 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 loj. 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 triode 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 load fais fab mov, thiab ib feem ntawm lub zog hluav taws xob yuav muab cia rau hauv inductor L thiab capacitor C.
Kev hloov hluav taws xob tswj hluav taws xob ua haujlwm hloov pauv hloov pauv hloov pauv thiab tam sim no diode (tuaj yeem yog lwm qhov hloov pauv hloov pauv) ib txwm hloov pauv ntawm lossis tawm, KQ thiab KD tsis yog cov khoom siv zoo tagnrho, ob lub xeev hloov pauv yuav tsum muaj qee lub sijhawm, uas ua rau muaj kev cuam tshuam loj heev. . Nyob rau hauv tus txheej txheem ntawm lub xeev txoj kev hloov, qhov kev hloov pauv ntawm qhov tsis ua tiav, thiab qhov kev txiav tawm tsis raug txiav tawm lub sijhawm, muaj txoj hauv kev ncaj qha los ntawm cov khoom siv hluav taws xob mus rau hauv av, uas ua rau lub sijhawm tam sim no yog. Qhov tam sim no muaj feem xyuam rau kev hloov pauv ntawm transistor conduction tam sim no Imax thiab qhov kev txiav tawm tam sim no Icmin qhov txawv ntawm qhov hloov pauv hloov tam sim no Imax thiab txiav tawm tam sim no Icmin, hloov KQ thiab KD tib lub sijhawm ua haujlwm, xws li lub sijhawm. 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.
