Tam sim no, muaj ntau hom DC/DC converters nyob rau hauv kev ua lag luam, resonant converter yog ib hom DC/DC converter topology, los ntawm kev tswj cov zaus hloov pauv kom ua tiav qhov tso zis hluav taws xob tas li resonance circuit. Resonant converters feem ntau siv rau hauv cov ntawv thov voltage siab kom du waveforms, txhim kho lub zog fais fab, thiab txo cov kev poob hloov pauv los ntawm cov hloov pauv fais fab zaus siab xws li MOSFETs thiab IGBTs. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias LLC circuit feem ntau yog siv rau hauv resonant converters vim nws ua rau xoom voltage switching (ZVS) thiab xoom tam sim no switching (ZCS) hauv qhov ntau thiab tsawg ua haujlwm, txhawb nqa cov zaus hloov pauv siab dua, txo qhov chaw ntawm cov khoom, thiab txo cov electromagnetic cuam tshuam (EMI).

Daim duab kos ntawm lub resonant converter

Ib lub resonant converter yog tsim los ntawm lub resonant inverter uas siv cov network ntawm cov switches los hloov DC input voltage mus rau hauv ib lub square wave, uas tom qab ntawd siv rau hauv ib lub resonant circuit. Raws li pom hauv Daim Duab 2, lub resonant circuit muaj ib lub resonant capacitor Cr, ib lub resonant inductor Lr thiab ib lub magnetizing inductor Lm ntawm lub transformer hauv series. Lub LLC circuit lim tawm txhua qhov high-order harmonics los ntawm kev xaiv nqus lub zog siab tshaj plaws ntawm lub square wave resonant frequency thiab tso tawm sinusoidal voltage los ntawm magnetic resonance. Lub AC waveform no yog amplified lossis txo los ntawm lub transformer, rectified, thiab tom qab ntawd lim kom tsim tau lub DC output voltage hloov pauv.

Simplified LLC resonant DC/DC converter

Qhov nruab nrab ntawm lub hauv paus (RMS) tam sim no ntawm lub capacitor yog ib qho ntawm cov kev ntsuas tseem ceeb uas yuav tsum tau xav txog thaum xaiv lub resonant capacitor Cr rau DC/DC converter. Nws cuam tshuam rau kev ntseeg siab ntawm lub capacitor, voltage ripple, thiab kev ua haujlwm tag nrho ntawm lub converter (nyob ntawm topology ntawm lub resonant circuit). Kev tso cua sov kuj cuam tshuam los ntawm RMS tam sim no thiab lwm yam kev poob sab hauv.