Modeling Pull-Push transformer in LTspice

[pieter t]

I use the folowing sims for my single end and push & pull sims

http://forum.zelfbouwaudio.nl/download/file.php?id=65461

The UL tap simulation is not quite correct (as already in Dutch indicated).
For the SE one: 1.9 should be 1.92; 4.1 should be 4.32.
For the PP one: 0.475 should be 0.48; 1.025 should be 1.08.
The sums do not have to be 6 resp 1.5.

 

[pieter t]

Thanks so much for that.... but still there is a confusion on it. ...I think the picture can be more clear. My question is:
L10 = 1.025, L11 = 0.475 and L15 = 0.008 is how to calculate it?

To understand, draw yourself the schematic with numbers of turns, which represent the winding ratios.
For example take 300 - 200 - CT - 200 - 300 turns for the primary, total 1000 turns.
The secondary number of turns for 4, 8 and 16 ohm are 63,25, 89,44 and 126,50 respectively (don't bother with the practical impossible 63,25 turns as it is about simulation here).
So for example coil L15 has 89,44 - 63,25 = 26,19 turns.
When the primary has a total inductance of 12 H, that L15 coil has an inductance of (26,19:1000)² x 12 = 0,008.. H.

 

[longji98]

Thanks so much for that, it is very helpful.