Momwe mungagwiritsire ntchito Resonant DC/DC Converter?

Pakalipano, pali mitundu yambiri ya otembenuza a DC / DC pamsika, osinthira resonant ndi mtundu wa DC / DC converter topology, poyang'anira kusintha kwafupipafupi kuti akwaniritse nthawi zonse zotuluka voteji resonance circuit.Ma resonant converters amagwiritsidwa ntchito kwambiri pamagetsi okwera kwambiri kuti azitha kusintha ma waveform, kukonza mphamvu zamagetsi, ndikuchepetsa kutayika kosinthika komwe kumachitika chifukwa cha ma switch amagetsi apamwamba kwambiri monga ma MOSFET ndi IGBT.Ndikofunika kudziwa kuti dera la LLC nthawi zambiri limagwiritsidwa ntchito posintha ma resonant chifukwa imathandizira zero voltage switching (ZVS) ndi zero current switching (ZCS) pamayendedwe ogwirira ntchito, imathandizira ma frequency apamwamba, imachepetsa kuponda kwa zigawo, komanso imachepetsa ma electromagnetic. kusokoneza (EMI).

Chithunzi chojambula cha resonant converter

Kusintha kwa resonant kumamangidwa pa inverter yolumikizira yomwe imagwiritsa ntchito netiweki ya masiwichi kuti isinthe ma voliyumu olowera a DC kukhala mafunde a square, omwe kenako amayikidwa kudera lozungulira.Monga momwe tawonetsera pa Chithunzi 2, dera la resonant lili ndi resonant capacitor Cr, resonant inductor Lr ndi magnetizing inductor Lm ya transformer mu mndandanda.Dera la LLC limasefa ma harmonics aliwonse apamwamba kwambiri potengera mphamvu zochulukirapo pama frequency okhazikika a square wave resonant ndikutulutsa voteji ya sinusoidal kudzera pamaginito.Mafunde a AC awa amakulitsidwa kapena kuchepetsedwa ndi thiransifoma, kukonzedwanso, kenako kusefedwa kuti apange magetsi osinthika a DC.

Chosinthira chosavuta cha LLC cha resonant DC/DC

The root mean square (RMS) panopa ya capacitor ndi imodzi mwamagawo ofunikira omwe amaganiziridwa posankha Cr yoyenera ya resonant capacitor ya DC / DC converter.Zimakhudza kudalirika kwa capacitor, ripple yamagetsi, komanso magwiridwe antchito onse a chosinthira (kutengera topology ya dera lowulungika).Kutentha kwa kutentha kumakhudzidwanso ndi RMS panopa ndi zina zotayika zamkati.