This video describes my issue pretty well (I have it set to start when he talks about my specific situation): ETA: looks like the board doesn't allow the video to start at the specific time, the important stuff begins around 5:30 Our applications are a bit different as his design is for single phase applications, but the problem remains the same for both cases: This is for a 3 phase variable frequency drive. An Arduino will use PWM to control the inverter. I'm going to have a gate driver on each of 6IGBTs. I need one ~18V DC source for the lower 3 IGBT gate drivers (this is kosher, will not cause a short), but then I need 3 more for each of the three upper IGBT drivers. We have one transformer dropping one of the 265V phase lines down to 24V, which I was then rectifying to use as a DC voltage supply for wherever necessary. That gives us one of the four sources needed to run the inverter. Using three separate batteries to provide the other sources would be really sloppy, bulky, and expensive. Same goes for using a single phase to three phase transformer + more rectifiers. I stumbled upon gate drive transformers and thought that I had a solution, but all of them appear to be for really high frequency applications (400khz+), which is no good for a VFD that will need to output 1-100hz signals. I'm kind of at a loss as to how to make this work and would appreciate any advice. Thanks.