Made a few modifications to the coil after blowing the crap out of the IGBT's. Again, as most have posted, the Secondary and Primary as shipped recently are way out of tune!
-First, I got a much faster Fan (Computer cooling fan). Although a little more noisy, it now really blows air!
-Second: Dropped the primary windings from 6 down to 5!
-This bought the Primary to about a 305 KHz resonance, while the secondary as I measured out of the box, was at around 325KHz.
-My Resistance to Ground (Secondary) is at 236 Ohms.
-Replaced the IGBT's
COILS is now "marching"......errrr you will need to see the video....
http://www.youtube.com/watch?v=bCC6C0CCF1Q
MUCH MUCH better, primary does not even get warm! The video was with about 45% of power....I will go higher, and see if it makes a difference, but VERY happy with the results, and the coil just seems to run SOOO much better now!
- It is currently Tue May 21, 2024 10:23 am • All times are UTC - 5 hours
MUCH MUCH better now!!!
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Re: MUCH MUCH better now!!!
Out of curiosity, what power level were you running your coil at for that video? Just trying to gauge a few things when comparing other member's output sparks. Still trying to figure out what works best for these coils.
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DJKOR - Magnificent MOSFET
- Posts: 193
- Joined: Sat Aug 17, 2013 4:12 am
- Location: Brisbane, QLD
Re: MUCH MUCH better now!!!
The run with the song as noted was at about 50%...in other words, I had the power pot on the interrupter turned to about it's midpoint.
I will get a little more brave soon, and probably run some tests with higher power, but right now I am having so much fun running it, that I do not want to run blowing up the IGBTs again (although I have 2 extra pairs!)
I will get a little more brave soon, and probably run some tests with higher power, but right now I am having so much fun running it, that I do not want to run blowing up the IGBTs again (although I have 2 extra pairs!)
- Cyborgcnc
- Tipsy Toggle Switch
- Posts: 8
- Joined: Sun Oct 13, 2013 5:23 pm
Re: MUCH MUCH better now!!!
I am LOVING this thing!! Absolutely Amazing, at only 50%.....so much better tuned with a 5 turn primary!!!
http://www.cnclutherie.com/images/Tesla2.jpg
http://www.cnclutherie.com/images/Tesla3.jpg
http://www.cnclutherie.com/images/Tesla2.jpg
http://www.cnclutherie.com/images/Tesla3.jpg
- Cyborgcnc
- Tipsy Toggle Switch
- Posts: 8
- Joined: Sun Oct 13, 2013 5:23 pm
Re: MUCH MUCH better now!!!
Cyborgcnc wrote:The run with the song as noted was at about 50%...in other words, I had the power pot on the interrupter turned to about it's midpoint.
I will get a little more brave soon, and probably run some tests with higher power, but right now I am having so much fun running it, that I do not want to run blowing up the IGBTs again (although I have 2 extra pairs!)
I just noticed you mentioning 45% power in the original post. I completely missed that one. Been having one too many late nights I think and starting to cloud my head.
Good to see though that your 5 turn primary managed to give you a satisfying outcome. Wish I could say the same about mine.
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DJKOR - Magnificent MOSFET
- Posts: 193
- Joined: Sat Aug 17, 2013 4:12 am
- Location: Brisbane, QLD
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