Guru
Joined: 21/06/2018
Location: AustraliaPosts: 1322
| Posted: 01:13am 05 Jan 2026 |
I have re-read the last few pages of your thread and now I have a question, what choke cores are you using now? The page link you posted for amorphous nanocrystalline cores, I did not follow the link at the time as I assumed that you had found suitable similar cores. After taking a closer look, the ferrite in my opinion is totally unsuitable for this type of inverter. It is usually used for transformers and EMI filters which require no energy storage, just energy transfer.
Maybe I read it wrong but it sounded like you gapped some of these cores so they would have lower inductance and have some energy storage characteristic. I strongly advise you reconsider those cores and go for the powdered iron type cores instead. I would use steel c cores gapped due to their softer saturation behaviour before I would use gapped ferrite .
Sorry to hear of the failure - maybe you no longer use the ferrite amorphous nanocrystalline cores in which case I will have a rethink as to what else may have caused the failure ?
Great pictures and good to see the setup you have put together.
Edited 2026-01-05 11:13 by wiseguy