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Forums
4hv.org :: Forums :: Tesla Coils
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DRSSTC VI

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Phillip Slawinski
Mon Jul 16 2012, 12:11PM Print
Phillip Slawinski Registered Member #1732 Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
Hi All,

Just thought I'd share my sixth DRSSTC here. It is collaboration between myself and Cameron Prince. It's a rather large coil, standing about eight feet tall. It also makes rather large sparks.

The secondary is a roughly 12" diameter form wound with #22AWG wire. The winding length is 60". With a 48" x 12" topload the coil has a F0 of ~36kHz.
7553662864 F5c93fbaa5 Z

The bridge is a full-bridge of CM600HA-24H IGBTs. These are all hooked up by a laminated bus that I designed.

7185267918 Cda5d664d6 Z
Solidworks rendering of the bridge.

7154642809 68369f7945 Z
Assembled bridge.

Here's a shot of the last test run. We didn't get much time to fool with it, because it was raining off and on. When we finally did get it up and running we didn't set the target very far away. As I recall it was only about 13 feet from the coil, which is no sweat for this coil.
7572522688 28003e31eb Z

Here's a video of the coil running in "ARSG" mode.


There are other videos on my YouTube channel and the Tesla Universe YouTube channel.
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Dr. ISOTOP
Mon Jul 16 2012, 12:40PM
Dr. ISOTOP Registered Member #2919 Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
Those are some nice laminated busses you've got there smile
Beautiful coil! Key specs? (MMC, peak current, etc?)
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Sigurthr
Mon Jul 16 2012, 01:44PM
Sigurthr Registered Member #4463 Joined: Wed Apr 18 2012, 08:08AM
Location: MI's Upper Peninsula
Posts: 597
That is quite a beautiful coil! What are you using to cool the bridge with, and is that a spun toroid?
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Phillip Slawinski
Mon Jul 16 2012, 03:08PM
Phillip Slawinski Registered Member #1732 Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
Dr. ISOTOP wrote ...

Key specs? (MMC, peak current, etc?)

MMC 8700VAC 1.25µF 750ARMS ~125lbs
Peak current is undetermined as of yet, but I have the limiter set to 3000A.

Sigurthr wrote ...

What are you using to cool the bridge with, and is that a spun toroid?

The bridge is cooled by a 8" fan. I think it's a few hundred CFM, which is overkill.
The toroid is not spun, it's a foam core with Aluminum tape wrapped around it.
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HV Enthusiast
Mon Jul 16 2012, 06:20PM
HV Enthusiast Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Thats REALLY beautiful. I really love the solid modeling and the detail to all the modeled components. Beautiful!!!
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RickR
Mon Jul 16 2012, 08:54PM
RickR Registered Member #93 Joined: Thu Feb 09 2006, 04:11PM
Location: Houston, Texas
Posts: 64
Sorry, strike this question, I see you've answered it above
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GORT
Tue Jul 17 2012, 03:46AM
GORT Registered Member #3212 Joined: Sat Sept 18 2010, 06:48PM
Location:
Posts: 4
You know, that is probably the best coil I've ever seen! Granted, there have been a lot of SG Power Coils, but this is a work of art! Sure you can throw SG power at anything and create sparks of length.. But this is a DRSSTC with balls!!!
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Kizmo
Tue Jul 17 2012, 04:05AM
Kizmo Registered Member #599 Joined: Thu Mar 22 2007, 07:40PM
Location: Northern Finland, Rovaniemi
Posts: 624
Great job Philip! :)

Gotta love that enormous pile of MMC you got there. Thats the way to go! There is absolutely no way one can overheat mmc like that cheesey

How high bus voltages are you using?
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StRyKeReYe
Tue Jul 17 2012, 07:52AM
StRyKeReYe Registered Member #5777 Joined: Tue Jul 17 2012, 03:34AM
Location: Moulton Al
Posts: 3
I second Barts response! That is the by far the best DRSSTC I've ever seen not to mention the largest . I think it might need at least 1lb more caps though becuase it can still roll and the wheels haven't buckled smile

All Jokes aside I'm sure Phillip has put ever spare moment into designing and perfecting this magnificent Work. And I'm sure more amazing work will be coming in the future.
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Steve Conner
Tue Jul 17 2012, 08:03AM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Wee! I like the bridge design smile
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