Kodi mungagwiritse ntchito bwanji DC/DC Converter?

Pakadali pano, pali mitundu yambiri ya ma DC/DC converters pamsika, resonant converter ndi mtundu wa DC/DC converter topology, powongolera ma switching frequency kuti akwaniritse constant output voltage resonance circuit. Ma Resonant converters amagwiritsidwa ntchito kwambiri mu ma high voltage applications kuti azitha kusalala ma waveforms, kukonza power factor, ndikuchepetsa kutayika kwa switching komwe kumachitika chifukwa cha ma high frequency power switches monga MOSFETs ndi IGBTs. Ndikofunikira kudziwa kuti LLC circuit nthawi zambiri imagwiritsidwa ntchito mu resonant converters chifukwa imalola zero voltage switching (ZVS) ndi zero current switching (ZCS) mu operating range, imathandizira ma switching frequency apamwamba, imachepetsa footprint ya zigawo, ndikuchepetsa electromagnetic interference (EMI).

Chithunzi chojambula cha chosinthira cha resonant

Chosinthira ma resonant chimamangidwa pa chosinthira ma resonant chomwe chimagwiritsa ntchito netiweki ya ma switch kuti chisinthe magetsi olowera a DC kukhala mafunde a sikweya, omwe kenako amaikidwa pa dera losinthira ma resonant. Monga momwe zasonyezedwera pa Chithunzi 2, dera losinthira ma resonant limapangidwa ndi capacitor Cr yosinthira ma resonant, inductor Lr yosinthira ma resonant ndi inductor Lm yosinthira ma magnetizing ya transformer mu mndandanda. Dongosolo la LLC limasefa ma harmonics aliwonse apamwamba mwa kutenga mphamvu yayikulu pa frequency yokhazikika ya mafunde a sikweya ndikutulutsa magetsi a sinusoidal kudzera mu magnetic resonance. Mafunde a AC awa amakulitsidwa kapena kuchepetsedwa ndi chosinthira, kukonzedwa, kenako kusefedwa kuti apange magetsi otulutsa a DC osinthidwa.

Chosinthira cha DC/DC chosavuta cha LLC chosinthika

Mphamvu yapakati pa sikweya (RMS) ya capacitor ndi imodzi mwazofunikira kuziganizira posankha capacitor yoyenera ya resonant Cr ya DC/DC converter. Zimakhudza kudalirika kwa capacitor, kugwedezeka kwa magetsi, ndi magwiridwe antchito onse a converter (kutengera topology ya resonant circuit). Kutaya kwa kutentha kumakhudzidwanso ndi mphamvu ya RMS ndi kutayika kwina kwamkati.