> Does anyone know (or know where to get info) on how to design an inverter > transformer? > Its input is 24-0-24 V square wave 100kHz or 20kHz (haven't decided yet) > Its outputs are- 1x 432 V at 2400W > and 1x 12 V at 6W. > The turns ratio is 1:18. Do I use a ferrite core? It needs to be as small as > possible. That's a very specialist transformer due to the power level. You will need tape windings or similar and great care with things like leakage inductance. Philips had some good application notes on high frequency power transformer design. Details about how you are intending to drive it and why would help people give better answers. eg At 2400w and 24v the average current is 100+ amps - not a design to be undertaken lightly. What sort of switching devices did you intend to use? Why? What sort of "inverter" circuit? Where did you get the circuit from? What is the intended load? Are you using the AC as is or rectifying or ... ? ... ? Russell McMahon -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics