Please excuse me if I am totally blundering. But I would really like to see if my premise has any merit or not. Also I am going out on a limb here so I might be mistaken on the physics behind it all. That subject never was my strong point ;(
My premise is that traditional laminated sheets for coils are sub optimal. The sheets still conduct electricity. Because there is a tiny gap between the sheets the effect of eddy currents induced by magnets rotating over them is reduced but not eliminated.
I would like to introduce a totally new way of going about things in this day and age but before I do so I will need to be able to demonstrate that the concept is indeed an improvement over traditional.
Something I am certainly not ready yet to without a doubt through out into the world at this stage. {2} But I want to believe!. Famous quotes The X files{2}
Please see the only stator of a 3 phase single stator alternator that I like to end up with. The rotors (magnets are on both sides but just not displayed here)
![how to detect eddy currents and measure their negative impact 15767-0](https://www.fieldlines.com/index.php?PHPSESSID=015d5cf1b6857c682853331ecb2a1f80&action=dlattach;topic=150851.0;attach=15767;image)
The idea is to have the coil disk engulfed with aluminum powder filled resin on the outskirts and the coils them self with iron powder filled resin.
I am imagining the incredible heat dissipation ability increase over just plain resin should I have understood things correctly and there are no unforeseen road blocks ahead.
Also for each magnet group (1 pair in both sides making 4 magnets in total) there are 3 coils. 1 for each phase. So basically there is a continues loop with minimal interruptions.
I have been trying to demonstrate in a convincing manner that the iron powder I am using does not (or at the very least much less than traditional laminated sheets) produce eddy currents because the powder is not electro conductive.
Early test results suggest I am on the right track but I am also known for making huge blunders so I need to take this a bit more scientific before I start making bold claims.
Please see the latest test setup I used. Earlier setups that made me think this is indeed worth exploring are horrendous and unwieldy.
![how to detect eddy currents and measure their negative impact 15768-1](https://www.fieldlines.com/index.php?PHPSESSID=015d5cf1b6857c682853331ecb2a1f80&action=dlattach;topic=150851.0;attach=15768;image)
The distance between the magnets is roughly 28mm and the field strength is around 120 mili tesla where I can get my probe at.
The central disk is non compacted (just gravity filled) iron powder. To more closely resemble the state it would be in when cast in resin.
Something like this.
![how to detect eddy currents and measure their negative impact 15766-2](https://www.fieldlines.com/index.php?PHPSESSID=015d5cf1b6857c682853331ecb2a1f80&action=dlattach;topic=150851.0;attach=15766;image)
In this current configuration there central bearing will contribute to the central disk rotating when I use a hand held drill to spin the magnets over the disk.
But it could also be that there is also the eddy current induced drag we all fear.
I did try rotating the magnets rather fast back and forth back and forth for like 1.5 minutes at full rotation drill speed and there is simply no heat build up that I can detect.
How do I make sure I am on the right track here?
{1] @SparWeb, please allow me to quote a line from your signature.
"No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it."
If coping quotes is a no no then please delete this addit{1}