Lecture 9.2: LLC Resonant Converter Analysis

Описание: I wanted to take a deep dive (not even that deep) into the LLC to hopefully explain what's going on in the different operating modes of this converter. Turns out there was more to cover than what I was expected (and stuff that probably needs to be covered in the future).


0:00 - Intro
1:10 - Full Bridge LLC
5:55 - Conversion Ratio

15:40 - Two resonant frequencies
23:20 - Gain at f1
27:30 - Gain at f0
29:30 - Bode Plot Sketch
34:30 - Soft Switching Regions
41:44 - Current at f0
51:30 - Current above f0
1:00:00 - Diode Rectifier Transitions
1:11:10 - Current below f0
1:18:05 - Current at f1
1:26:40 - Current below f1
1:34:30 - Outro



CORRECTIONS:
4:28 - I forgot to include the factor of n in the average output current, so I included it in editing


25:31 - I incorrectly used a + instead of a - and edited after the fact


40:55 - I mixed up the ZVS and ZCS regions based on load resistance and edited it for clarity.


1:04:00 - I forgot parentheses around Vg - v_c(t) here. v_Lm(t) = (Vg - v_c(t))*(Lm/(Lm+Lr))



References:
Fundamentals of Power Electronics - Erickson and Maksimovic

https://www.infineon.com/dgdl/Applica...


https://www.infineon.com/dgdl/an-1160...



https://www.st.com/resource/en/applic...



https://www.onsemi.com/pub/Collateral...



https://ietresearch.onlinelibrary.wil...


These are a little less helpful

https://www.psma.com/sites/default/fi...


This is some really old school markup

https://www.ti.com/lit/an/slua159/slu...