I am new to this forum, so hello to all of you! I am also relatively new to LTSpice, so this might even be an easy question for you to answer ;)
I am currently working on an LLC converter, and I'm trying to verify my analytical calculations of the First Harmonic Approximation of the LLC in Maple with a FHA model of the LLC in LTSpice XVII.
This all works fine, however I am encountering one abnormality:
I am exciting the LLC at it's series resonant frequency of fr=141366 Hz, calculated by fr=1/(2*pi*sqrt(L1*C1)). This, in theory, should lead to the input voltage of Vin appearing across R1/L2 as well, since the series combination of L1 and C1 are acting as a short at their resonant frequency. However: I am losing around 4V pk-2-pk when comparing Vout with Vin. I have already set all ESR/EPR/ESI/ESC to 0 in the capacitor model and Series&Parallel resistance and Parallel Capacitance to 0 in the Inductor models.
Question: Am I missing any possibility of a 'hidden' series resistance here? Or how else can this deviation be explained?
Changed title to include a questionmark
[edited by: Bram_NL at 8:41 AM (GMT -5) on 17 Jan 2021]