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My DRSSTC 2

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Goodchild

Mon May 24 2010, 07:03PM

Registered Member #2292 Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795

Well after much work (still more work to be done) I figure I should show off my DRSSTC 2

Well I guess ill start with some specs:

Secondary: 18x4.5 1800 turns 30 AWG
Topload: 18x4.5
Fo: 105KHz
Tank cap: 0.2uF 8KvDC
Power electronics: CM300DU-24F half bridge
with doubler (CM00DU-24F has had the current limiter removed

)
Controller: Steve Ward's UD2.0

Here are some pics of the coil:
4636577952 560595938b

Original pic:

Original pic:

Original Pic:

And now some sparks!
right now 60 inches is my current limit (that's 3.333333x) because the
garage is just to small, will have to wait to take it outside

original image here:

Also here is a video of it running in the garage:

Arcstarter

Mon May 24 2010, 08:31PM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

Very nice! I love all the LEDs, and for some odd reason i really like the simple building material! I have a request. When you get this puppy somewhere larger, I'd love to see a breakout point on the side and some ground strikes! 3 times the coil length is plenty :-o and you say you can push it harder

. Seeing a half bridge kick so much butt kind of makes me want to make one with my CM200DU-24F.

How did you remove the current limiter? That sure is puzzling! And it seems these CM series bricks have a tan-ish color to the insulating gel inside, so you cannot see the parts. How did you get through all of that stuff?

I will be waiting for updates!

Luca

Mon May 24 2010, 09:07PM

Registered Member #2481 Joined: Mon Nov 23 2009, 03:07PM
Location: ITALY
Posts: 134

Very impressive!

I think that the IGBTs your are using are a bit oversized for such coil...
Anyway, very good results!

Luca

Goodchild

Mon May 24 2010, 09:09PM

Registered Member #2292 Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795

Arcstarter wrote ...

How did you remove the current limiter? That sure is puzzling! And it seems these CM series bricks have a tan-ish color to the insulating gel inside, so you cannot see the parts. How did you get through all of that stuff?

I will be waiting for updates!

Thanks for the complements!

Any way ya the goop is a pain in the butt, I got 4 CM300DU-24Fs from ebay I was lucky that the first one I tried to open up had clear goop

To disable the current limiter (RTC) all you have to do is cut 2 wires but you have to be careful not to cut the third wire going to the gate.

This is my Brick:
4583736603 D631988a90

This is Bart Anderson's brick:
CMRTC

Goodchild

Mon May 24 2010, 09:11PM

Registered Member #2292 Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795

Luca wrote ...

Very impressive!

I think that the IGBTs your are using are a bit oversized for such coil...
Anyway, very good results!

Luca

Thanks

Ya I know they are over kill, but that's the point! This way they will almost never blow up again

Sorry for double post don't kill me!

Coronafix

Mon May 24 2010, 10:52PM

Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938

Beautiful layout, neat and elegant!

doctor electrons

Tue May 25 2010, 02:15AM

Registered Member #2390 Joined: Sat Sept 26 2009, 02:04PM
Location: Milwaukee Wisconsin
Posts: 381

Not only does it work, its a beautiful piece of artwork!
Awesome! Fantastic job!!

Goodchild

Tue May 25 2010, 02:54AM

Registered Member #2292 Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795

Thanks very much

teravolt

Tue May 25 2010, 03:34AM

Registered Member #195 Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111

Hi Goodchild, nice work. Does the cm300 speed up when you remove the limmiter? Do you think it could be done with a cm600?

Goodchild

Tue May 25 2010, 03:57AM

Registered Member #2292 Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795

teravolt wrote ...

Hi Goodchild, nice work. Does the cm300 speed up when you remove the limmiter? Do you think it could be done with a cm600?

Disabling the RTC didn't speed up the bricks, It just allowed me to push more current through them.

The only way I could run the CM300 at such a high Fo is because my coil uses Steve Ward's new driver which incorporates
phase lead to switch the large bricks before the zero crossing, this yields near perfect ZCS ( and no ringing

)

As for trying it with CM600s I bet it could be done, although phase lead dose have it's limits.

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