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Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
Beautiful pictures and great results so far :)
Have you noticed any heating in the metal frame? You might not see it at sub 1kA, I think it was Dr. Spark that had a metal net heated up enough to burn the paint off, from just being near the primary pushing a few kA's.
Have you noticed any heating in the metal frame? You might not see it at sub 1kA, I think it was Dr. Spark that had a metal net heated up enough to burn the paint off, from just being near the primary pushing a few kA's.
Thanks for all the comments everyone. For the metal frame, I actually replaced some of the aluminum connectors with custom fiber composite connectors, to open as many conductive loops as possible. However I did not see any noticeable change in performance, nor did I witness any sort of heating prior to this. My guess is that the aluminium framing itself has a pretty thick layer of anodizing, and the loops may not actually be low-resistance loops in the first place. :)
As for the toroids, I had somewhat of a budget for this so they were purchased from Amazing1. They're pretty expensive and shipping is not cheap either, but they are really beautiful.
I took some photos recently of the coils in action and running off a proper power line instead of a small generator :)
Here's the coil running at about 800Apk. I'm pretty sure I got that rare arc across from one coil to the other (about 2.8m point to point). Otherwise most of the time it's around 2.5m long sparks or less. About 3x plus secondary length, so it's running ok I think. So far extended runs (several minutes at a time) have been good, with the coil not really getting warm. However, this is likely due to the fact that it's quite cold these days (less than 10-5C).
IGBTs should be good for even higher current. Time to turn it up sometime!
Here's a photo of both coils in action. Had to turn the power down because of lack of space.
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Semikron DRSSTC Twin Coils!
