Switching power supply overhaul experience
1, switching fais fab mov tsis pib vibration, feem ntau xyuas seb qhov hloov zaus yog qhov tseeb, seb puas muaj kev tiv thaiv Circuit Court thaiv, voltage tawm tswv yim Circuit Court, tam sim no tawm tswv yim Circuit Court tsis muaj teeb meem, seb lub switching tube puas, thiab lwm yam.;.
2, lub transformer kub los yog muab lub suab "zzzzzzzzzzzzzzz", feem ntau qhov hloov zaus tsis raug.
3, qhov tso zis hluav taws xob qhov hluav taws xob qhov taw qhia lub teeb flashes lub flash feem ntau yog luv luv ntawm sab nraud.
General switching tube, charging resistor, rectifier diode yog ib qho yooj yim los ua phem ...... yog li feem ntau ua ntej nrog ib qho kev ntsuas digital multimeter, tsis muaj qhov phem hauv lub zog tshawb nrhiav. Yog tias qhov chaw tuaj yeem pom ntawm qhov chaw ntawm qhov chaw hlawv yog qhov zoo dua los xyuas.
Switching fais fab mov sab hauv cuam tshuam thiab sab nraud cuam tshuam
Kev hloov hluav taws xob cuam tshuam feem ntau yog muab faib ua ob pawg: ib qho yog qhov hloov hluav taws xob hauv cov khoom siv los tsim kev cuam tshuam; qhov thib ob yog vim muaj kev cuam tshuam ntawm cov khoom siv sab nraud thiab ua rau lub zog hloov hluav taws xob cuam tshuam. Ob leeg koom nrog tib neeg cov xwm txheej thiab cov xwm txheej ntuj.
Switching power supply internal cuam tshuam:
Hloov fais fab mov EMI feem ntau yog tsim los ntawm cov txheej txheem rectifier tsim los ntawm kev cuam tshuam kev sib raug zoo tam sim no thiab lub zog hloov hluav taws xob uas tsim los ntawm qhov cuam tshuam ntawm qhov cuam tshuam.
Basic rectifier: cov txheej txheem rectification ntawm lub hauv paus rectifier yog ib qho ua rau EMI *. Qhov no yog vim muaj zaus AC sinusoidal nthwv dej los ntawm lub rectifier tsis yog ib zaus tam sim no, tab sis mus rau hauv ib tug ncaj tam sim no tivthaiv thiab ib tug series ntawm harmonic Cheebtsam nrog ntau zaus, harmonics (tshwj xeeb tshaj yog lub siab harmonics) yuav raug generated nyob rau hauv lub kis kab mob. ntawm kev cuam tshuam ntawm kev cuam tshuam thiab hluav taws xob cuam tshuam, yog li ntawd qhov kev cuam tshuam ntawm lub hauv ntej-kawg tam sim no distortion, ntawm ib sab, yog li tam sim no waveform txuas nrog lub hwj chim kab nyob rau pem hauv ntej ntawm distortion, ntawm qhov tod tes, los ntawm cov kab hluav taws xob los tsim cov xov tooj cua. zaus cuam tshuam.
