Time for a new Warpinverter build

Author	Message
rogerdw Guru Joined: 22/10/2019 Location: Australia Posts: 955	Posted: 06:07am 13 Mar 2021         Warpspeed said   Bigger core means fewer turns required, and/or more winding space. That may enable thicker wire to be used which means more current with less heating. Safe temperature rise is what sets the final limit to power. Ahh okay, thanks for that. I'm slowly getting it. So that fits in with what you explained a while ago about the current rating of the wire  ...  where it depended on the ability to get rid of any excess heat  ...  and that torroids are a good choice because they can be cooled reasonably well with air through the centre. That leads me to a new question then. I am wondering what is an expected top temperature for one of these transformers once they've been rewound? The reason for the question is because I have realised the secret (for me anyway) of winding a neat transformer, is to mark out and wind the first layer accurately  ...  and then any subsequent layer just falls into place. So I was considering instead of using plywood washers at top and bottom  ...  to 3-D print some about 5mm thick and rounded edges  ...  but also print in the troughs and ridges for the first layer. I know, it's probably classed as cheating but I don't mind.   Then of course the question is, will the 3-D print material stand up to the heat and pressure of a tightly wound toroid. Definitely don't want it collapsing after a few years and loosening off all the windings so they rattle to bits.