Summary of switching power supply care experience
1, lub zog hloov hluav taws xob tsis pib kev vibration, feem ntau xyuas seb qhov hloov pauv zaus puas yog, seb qhov kev tiv thaiv Circuit Court puas raug thaiv, qhov hluav taws xob tawm tswv yim Circuit Court thiab cov lus tawm tswv yim tam sim no tsis muaj teeb meem, seb lub raj hloov pauv puas lawm, thiab lwm yam.
2. Thaum lub transformer kub los yog ua rau lub suab "Zi Zi", qhov hloov zaus feem ntau tsis ncaj ncees lawm;
3, qhov tso zis voltage fais fab mov qhia lub teeb flashing feem ntau luv luv-circuited ntawm ob sab.
Feem ntau, hloov cov raj, them cov resistors thiab rectifier diodes yog ib qho yooj yim rau tawg ... Yog li feem ntau, ntsuas lawv nrog lub tshuab multimeter ua ntej, thiab yog tias tsis muaj qhov tawg, lawv yuav raug sim ntawm lub zog. Nws yuav yooj yim dua los xyuas yog tias koj tuaj yeem pom qhov chaw hlawv ntawm qhov chaw.
Internal cuam tshuam thiab sab nraud cuam tshuam ntawm switching fais fab mov
Kev cuam tshuam ntawm kev hloov fais fab mov feem ntau muab faib ua ob pawg: ib qho yog kev cuam tshuam los ntawm cov khoom siv sab hauv ntawm kev hloov hluav taws xob; Qhov thib ob yog qhov cuam tshuam los ntawm lwm yam. Ob leeg koom nrog tib neeg cov xwm txheej thiab cov xwm txheej ntuj.
Internal cuam tshuam ntawm switching fais fab mov:
EMI generated los ntawm kev hloov fais fab mov feem ntau yog tshwm sim los ntawm high-order harmonic tam sim no cuam tshuam generated los ntawm yooj yim rectifier thiab ncov voltage cuam tshuam generated los ntawm lub hwj chim converter Circuit Court.
Basic rectifier: Cov txheej txheem rectification ntawm yooj yim rectifier yog ib qho ua rau EMI *. Qhov no yog vim hais tias lub hwj chim zaus AC sine yoj tsis yog tam sim no nrog ib zaus tom qab kho, tab sis dhau los ua cov khoom siv tam sim no thiab cov khoom sib haum xeeb nrog ntau zaus. Harmonics (tshwj xeeb tshaj yog kev sib haum xeeb siab dua) yuav ua rau muaj kev cuam tshuam ntawm kev cuam tshuam thiab hluav taws xob cuam tshuam raws li cov kab sib kis, uas yuav cuam tshuam rau pem hauv ntej-kawg tam sim no, ntawm ib sab, distort lub waveform tam sim no txuas nrog nws cov kab hluav taws xob pem hauv ntej, thiab ntawm qhov tod tes. , tsim cov xov tooj cua zaus cuam tshuam los ntawm txoj kab hluav taws xob.
