Hopefully? Another 48vdc-240vac Toriod Inverter build.

Author	Message
analog8484 Senior Member Joined: 11/11/2021 Location: United States Posts: 141	Posted: 04:53pm 25 May 2023         KeepIS said   The EMF produced by my inverter in my HF radio equipment has now increased from nothing to pretty dam bad - what changed - I changed chokes, in particular that small Ferrite core. It's now very clear that the primary choke design is all about balancing multiple conflicting objectives.   KeepIS said   So now I have to drag out my spectrum analyzer, see what I'm looking at, hope splitting the big choke for each leg reduces it somewhat, and then likely set about designing an RF filter while finding the exact mode of injection or radiation paths into the external communications equipment, which is something akin to herding cats. Perhaps adding back a small ferrite or two would help?   KeepIS said   As I sit here typing, there have been five 500A peak DC load startups, each a full 2.5 seconds of solid 500A, followed by another half dozen 290A DC startup loads each time, the UPS is silent! the inverter is silent! . I think your build has really demonstrated the value of a high saturation current primary choke.