I searched on the internet for some examples, but they weren't clear. I tried to figure it out myself but it doesn't work.

I tried making a 4:1 step-down transformer in Y-Y configuration, but the output voltages (x,y,z) are different and not equal to 100V (peak).

What am I doing wrong? Is it the coupling? Does it have to be something like K L1 L2 L3 L4 L5 L6 1?

Thank you.

 

Three phase delta-delta configuration:

 

I don't understand. What is wrong with my configuration?

 

I see nothing wrong with your configuration. Current build-up in inductors takes time. Run the sim for a longer time (e.g 1 sec).

 

Thank you @Alec_t , you were right! When it doesn't involve capacitors I always forget about transient phenomenons


This thread has been resolved by @Alec_t

 

@Alec_t by the way is there a "black box" in LTspice that can be used as a transformer for more complex circutiuts? So I won't have to make this every time. Thank you!

 

I expect someone (e.g. @Bordodynov) has made a model, but as transformers can have such a range of properties it would involve setting a lot of parameters for a realistic model, so may not save a lot of time over doing what you have already done.