As there is no model for such a transformer in Matlab, I need the exact equations of primary and secondary voltage and currents of this transformer and also the wiring connections so that I can build the model of delta-zig zag transformer myself.
I am sorry this is not my field of expertise. I am not even sure whom to ask in my corporation.
we can consider following :
1. If you want the complete equivalent circuit for say core type transformer draw the magnetic circuit and obtain the electrical dual.
2 If you want only the idealized transformation from primary star to delta trfo to secondary zigzag try the following:
2.1 Connection matrix source vp= [ van vbn vcn ] line to neutral source to delta primary
vdp =[ vabp vbcp vca ] is vdp = [C] *vp' where C=[ 1 -1 0; 0 1 -1 ; -1 0 1]
Similarly iap= C * ideltp
2.2 delta to zigzag vaz - [D ] *vdp where D =[ t1 t2 0 ; 0 t1 t2 ; t2 0 t1] t1 , t2 are turns ratios of primary delta to secondary zig zag .. you can add t3 if you like.
2.3 Similarly current transformation matrix using 1/t1 1/t2 can be obtained
3. Just remember currents add up in primary like multiple winding secondaries trafo.and are in series in secondary .
hope it helps.
Cheers
Thank you all for your answers. if you know any references about zig zag transformers, I'll be grateful if you introduce it to me.
- Badges
- Science topic