drsstc: the french tesla coil

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drsstc: the french tesla coil

Postby pierrepaul » Thu Jan 29, 2015 4:40 pm

Hi,

To tell you the truth, I talk about my project
I am in high school in the class of art and I had the idea of transform a scientific subject into a work of art. (Ready made or arte povera) see Roman sign tesla coil.
For 3 years, I dreamed of the coil; designated several projects and received an education in electrical physics alone (no help, the technology of drsstc is little known in France) to finally use one tesla kit providing good value for money.
After several days of construction, the kit worked without problems at first start at 100% power with sparks from 1 foot long and great music.

A video will be posted later.

However, here are small changes.
_ The screws of the secondary coil are made of nylon.
_ The coil is polyurethane varnish.
_ The earth has been modified to pass through one of the screws on the card and not be in contact with the IGBT.
_ The use of an aluminum plate to the ground.
_ Cards were cleaned with isopropyl alcohol.
_the hot glue does not !! I recommend the use of epoxy resin to the secondary.
_ The thermal paste was not used (risk of short circuits)

frequency raisonnance was calculated at 279 kHz (the frequency does not take into account the capacity of the secondary coil.)
_Inductance Coil: 0.0366 henry with the correction Coefficient.
_ Toroid capacity: 8.85. 10-12 Farad
_ Resistance 261 ohms.

... and measured at 295 kHz with 555 tuner.
I use 5 turns with 14AWG wire kit.

It was a beautiful moment to first boot up.
However, I am disappointed with the result.
sparks are slightly smaller than my wish.
I am looking to optimize coupling to spare the IGBT bridge.

again sorry for my english, I hope so that my advice will help.

great kit, applaud the creators. :geek: :D
Attachments
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Re: drsstc: the french tesla coil

Postby pierrepaul » Sat Jan 31, 2015 3:27 am

the first lights
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Re: drsstc: the french tesla coil

Postby pierrepaul » Tue Feb 17, 2015 4:56 am

Watch on youtube.com
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Re: drsstc: the french tesla coil

Postby drgav2005 » Tue Feb 17, 2015 12:28 pm

Nice work - looks great! :)
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Re: drsstc: the french tesla coil

Postby Frost273 » Wed Feb 18, 2015 12:43 pm

Your photos are great. From time to time and then again I realize how cool the streamers are.
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Re: drsstc: the french tesla coil

Postby pierrepaul » Thu Feb 19, 2015 4:18 am

hello ,

merci pour les compliments :lol:
next:
Attachments
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Re: drsstc: the french tesla coil

Postby drgav2005 » Thu Feb 19, 2015 1:10 pm

Wow! Very cool :D
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the fuse blows and the driver no works

Postby pierrepaul » Fri May 08, 2015 4:22 am

hi,
after several months of use, my fuse blew but do not seem damaged IGBT (13 megaohms between phase and neutral, no short circuit).
But the pilot level a spark formed between the screw and the green led and the receiver.I replaced the green led , the receiver no work(it's not destroyed ), but no results. The driver does not want to start, I think the logic circuits 74hctxx are destroyed.
How to test each IC?
How to cover this burn ?
Can I replace fga60n65 by fgh60n65 (I can't find the pdf file of fghxxxx)?
RSCN8382.JPG
fail
(319.42 KiB) Not downloaded yet


thank you.
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Re: drsstc: the french tesla coil

Postby pierrepaul » Wed Feb 03, 2016 5:51 pm

Hi,

I have a problem that is very irritating

this is my third IGBT and diode bridge failure !!! :?
I could visualize the problem with an oscilloscope:
-I have very large noise signals on VCE VGE.
 finally, there is overshoot and violent IGBT fail
-I think of a bad soft switching and zero-current switching


output bridge
_MG_0676.jpg
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with primary current
_MG_0668.jpg
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_MG_0669.jpg
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My deplorable English prevents me from doing good research.

What is the procedure on one tesla card to get rid of its current peak?


Paul
Last edited by pierrepaul on Fri Apr 08, 2016 7:32 am, edited 2 times in total.
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Re: drsstc: the french tesla coil

Postby loneoceans » Wed Feb 03, 2016 6:14 pm

pierrepaul wrote:Hi,

I have a problem that is very irritating

this is my third IGBT and diode bridge failure !!! :?
I could visualize the problem with an oscilloscope:
-I have very large noise signals on VCE VGE.
 finally, there is overshoot and violent IGBT fail
-I think of a bad soft switching and zero-current switching

Here are pictures of my installation
_MG_0674.jpg

output bridge
_MG_0676.jpg

with primary current
_MG_0668.jpg

_MG_0669.jpg










My deplorable English prevents me from doing good research.

What is the procedure on one tesla card to get rid of its current peak?


Paul


This is not a problem, the oneTesla driver is working as designed. In order to truly get perfect switching you need a more advanced driver which is able to predict the zero crossing and switch the transistors earlier so that they fully turn on right at the crossing. Here's a driver that does just that: www.loneoceans.com/labs/ud27
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