Wanted: Source for 8-10Kw toroid cores.

Author	Message
lostmark Newbie Joined: 25/02/2023 Location: Australia Posts: 1	Posted: 08:45am 17 Feb 2024       Hi Mike, I'm starting to think about transformers for a new design. (I'm wondering about GaNFETs and 500kHz. There'll be some learning to be done!). I like your idea of stacking cores, modifying and paralleling original pri & sec, and adding new primary. If you keep can keep your new primary copper loss lowish, you could expect a healthy increase in continuous power rating of each core, given you've halved the new secondary resistance. You'll lose some surface area for heat dissipation, and have losses in the new primary, so a doubling of continuous power would be too much to expect. But it should be a healthy increase nevertheless. But I'm yet to understand what type of wire you'd use for such high current windings. And I presume these ex-GTI transformers are rated in still air? So the addition of a (switched) fan could allow quite a bit higher continuous load. Cheers, Mark