Ungayisebenzisa kanjani i-DC/DC Converter?

Njengamanje, kunezinhlobo eziningi zama-converter e-DC/DC emakethe, i-resonant converter uhlobo lwe-topology ye-converter ye-DC/DC, ngokulawula imvamisa yokushintsha ukuze kufezwe isekethe ye-resonance ye-voltage ephumayo njalo. Ama-converter e-Resonant avame ukusetshenziswa ezinhlelweni ze-voltage ephezulu ukuze kube bushelelezi ama-waveform, kuthuthukiswe amandla, futhi kuncishiswe ukulahlekelwa kokushintsha okubangelwa ukushintsha kwamandla emvamisa ephezulu njenge-MOSFET kanye ne-IGBTs. Kubalulekile ukuqaphela ukuthi isekethe ye-LLC ivame ukusetshenziswa kuma-converter e-resonant ngoba ivumela ukushintsha kwe-zero voltage (ZVS) kanye nokushintsha kwe-zero current (ZCS) ebangeni lokusebenza, isekela ama-frequency aphezulu okushintsha, inciphisa umthelela wezingxenye, futhi inciphisa ukuphazamiseka kwe-electromagnetic (EMI).

Umdwebo we-schematic we-resonant converter

I-resonant converter yakhelwe ku-resonant inverter esebenzisa inethiwekhi yamaswishi ukuguqula i-DC input voltage ibe yi-square wave, bese isetshenziswa ku-resonant circuit. Njengoba kuboniswe ku-Figure 2, i-resonant circuit iqukethe i-resonant capacitor Cr, i-resonant inductor Lr kanye ne-magnetizing inductor Lm ye-transformer ochungechungeni. I-LLC circuit ihlunga noma yimaphi ama-harmonics aphezulu ngokumunca ngokukhetha amandla aphezulu ku-fixed square wave resonant frequency kanye nokukhulula i-sinusoidal voltage nge-magnetic resonance. Le waveform ye-AC iyandiswa noma incishiswe yi-transformer, ilungiswe, bese ihlungwa ukuze ikhiqize i-DC output voltage eguquliwe.

Isiguquli se-DC/DC esilula se-LLC esiphendulayo

Isilinganiso samandla esimaphakathi sempande (RMS) se-capacitor singenye yemingcele ebalulekile okufanele icatshangelwe lapho kukhethwa i-capacitor eguquguqukayo ye-Cr ye-converter ye-DC/DC. Ithinta ukuthembeka kwe-capacitor, i-voltage ripple, kanye nokusebenza okuphelele kwe-converter (kuye ngokuthi i-topology yesekethe ye-resonant injani). Ukushabalaliswa kokushisa nakho kuthintwa yi-RMS current kanye nokunye ukulahlekelwa kwangaphakathi.