Cov teeb meem kev nyab xeeb dab tsi yuav tsum tau them rau hauv kev hloov cov khoom siv hluav taws xob?
Aug 13, 2018| Vim muaj kev ua haujlwm siab thiab me me, kev siv hluav taws xob hloov hluav taws xob tau siv dav hauv kev tsim cov khoom siv hluav taws xob, cov khoom yuav raug muab tso rau hauv kev ua lag luam, thiab tsim kom muaj lub hauv paus hauv kev lag luam, cov khoom pov thawj kev nyab xeeb yog qhov tseem ceeb. Yog li, dab tsi yog qhov teeb meem kev nyab xeeb uas yuav tsum tau them rau hauv kev hloov cov khoom siv hluav taws xob?
Ua ntej: kev nyab xeeb nrug specification
Cov teeb meem hauv qab no ntsig txog kev nyab xeeb tsuas yog rau thawj zaug, theem nrab thiab qhov hluav taws xob siab, qhov chaw siab tam sim no PCB layout.
AC input LN, N-GND, L-GND qhov sib nrug yuav tsum siab dua 3.5 hli; thawj rectification lim capacitor yog qhov zoo; qhov tsis zoo yuav tsum ntau dua 4 hli; thawj thiab theem nrab qhov sib nrug yuav tsum ntau dua 6 hli (qhov sib txuas kho qhov muag yog qhov tsawg kawg nkaus); Thaum qhov hluav taws xob hluav taws xob tsawg dua 48V, qhov kev teeb tsa feem ntau tsis tas yuav tsum muaj kev nyab xeeb.
Nws yuav tsum tau muab sau tseg ntawm no hais tias cov hluav taws xob clearance thiab creepage deb yuav tsum tau raws li qhov yuav tsum tau.
Thib ob: qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas
Kuaj cov ntsiab lus thiab cov qauv
Input-output withstand voltage test thiab standard
AC 3000V, tiv taus qhov hluav taws xob rau 1 feeb, qhov xau tam sim no tau teem rau 10mA. Lub ntsuas hluav taws xob qhia tias qhov hluav taws xob xau yog<10 mA, and no arcing is acceptable.
Input - lub ntiaj teb siab ntsuas
AC 1500V, withstand voltage rau 1 feeb, to tam sim no yog teem rau 10mA; lub ntsuas hluav taws xob qhia tias cov dej ntws tawm tam sim no<10mA, and no arcing phenomenon is acceptable.
Cov zis - lub ntiaj teb tiv taus qhov ntsuas hluav taws xob
DC 500V, 1 feeb tiv taus hluav taws xob, xau tam sim no rau 10mA, tiv taus qhov ntsuas hluav taws xob xau tam sim no<10mA, and no arcing phenomenon is qualified.
Lus Cim: Lub ntiaj teb yog lub qhov rooj sab nrauv. Qhov ntsuas ntsuas yog lub ntsuas ntsuas siab.
Thib peb: insulation test specification
Test cov ntsiab lus thiab cov qauv:
Cov tswv yim - Ntiaj teb> 500Mohm yog tsim nyog;
Cov zis - Ntiaj teb> 500Mohm yog tsim nyog;
Input-output >500Mohm tau txais;
Plaub: ntsuas kub ntsuas ntsuas
Cov ntsiab lus kuaj: Tom qab lub zog hloov hluav taws xob tau ruaj khov rau lub sijhawm ntev, sim ntsuas qhov ntsuas kub ntawm qhov hloov MOSFET, hloov pauv hloov pauv, thawj qhov hloov kho lim capacitor, theem nrab rectifier, thiab lim inductor thiab cov ntaub ntawv.
Kev Txiav Txim Siab: Muab piv rau qhov ntsuas qhov ntsuas kub nrog rau tus qauv kev nyab xeeb, qhov ntsuas kub ntawm cov cuab yeej saum toj no yuav tsum tsawg dua tus nqi nyab xeeb.