In our current design of our single-phase NPC T-type converter, we are using four dedicated (and expensive) power supplies (actually, DC-DC converters, since we have incoming 48V, and the converters step that down to 12V). Upon running a simulation, I have found that I can use much cheaper pulse transformers... So I would be powering four MOSFET drivers in parallel from the output of the converter, and the output of these (Vb and Vs) would be wired to each of the four primary sides of the pulse transformers. The secondary sides would be wired to the V_gs of the four MOSFETs.
How would this method compare to using four dedicated power supplies, instead of one oversized one?
Thanks a lot.
EDIT: Many are asking for schematics. This is kind of difficult since I am using new simulation software (PSIM) and I haven't mastered it to the point of making easily readable schematics. I made a very simplified one to illustrate what I am trying to say. Only the gate signal for the low-side MOSFET is shown.
EDIT#2: I am reading through a .pdf, and the following is a proposed circuit that can be used so that pulse transformers can be implemented... Would this circuit work if correct component values are chosen?