Uyisebenzisa njani i-DC/DC Converter?

Okwangoku, kukho iintlobo ezininzi zee-DC/DC converters ezithengiswayo, i-resonant converter luhlobo lwe-topology ye-DC/DC converter, ngokulawula i-switching frequency ukuze kufezekiswe i-constant output voltage resonance circuit. Ii-Resonant converters zihlala zisetyenziswa kwizicelo ze-high voltage ukuze zigudise ii-waveforms, ziphucule amandla, kwaye zinciphise ilahleko zokutshintsha ezibangelwa zii-high frequency power switches ezifana nee-MOSFET kunye nee-IGBTs. Kubalulekile ukuqaphela ukuba i-LLC circuit idla ngokusetyenziswa kwi-resonant converters kuba ivumela i-zero voltage switching (ZVS) kunye ne-zero current switching (ZCS) kuluhlu lokusebenza, ixhasa ii-switching frequency eziphezulu, inciphisa i-footprint yezixhobo, kwaye inciphisa ukuphazamiseka kwe-electromagnetic (EMI).

Umzobo wesicwangciso somguquli we-resonant

I-resonant converter yakhelwe kwi-resonant inverter esebenzisa inethiwekhi yeeswitshi ukuguqula i-DC input voltage ibe yi-square wave, ethi emva koko isetyenziswe kwi-resonant circuit. Njengoko kubonisiwe kuMfanekiso 2, i-resonant circuit ine-resonant capacitor Cr, i-resonant inductor Lr kunye ne-magnetizing inductor Lm ye-transformer kuthotho. I-LLC circuit ihluza naziphi na ii-harmonics eziphezulu ngokufunxa ngokukhetha amandla aphezulu kwi-fixed square wave resonant frequency kwaye ikhuphe i-sinusoidal voltage nge-magnetic resonance. Le waveform ye-AC iyandiswa okanye incitshiswe yi-transformer, ilungiswe, ize ihluzwe ukuze kuveliswe i-DC output voltage eguquliweyo.

Isiguquli seDC/DC esilula se-LLC esiphendulayo

Umsinga we-root mean square (RMS) we-capacitor yenye yeeparameter ezibalulekileyo ekufuneka ziqwalaselwe xa kukhethwa i-resonant capacitor Cr efanelekileyo kwi-DC/DC converter. Ichaphazela ukuthembeka kwe-capacitor, i-voltage ripple, kunye nokusebenza ngokubanzi kwe-converter (kuxhomekeke kwi-topology yesekethe ye-resonant). Ukuchithwa kobushushu kukwachaphazeleka yi-RMS current kunye nezinye iilahleko zangaphakathi.