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4hv.org :: Forums :: High Voltage
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Silicone Self-Fusing Tape As Layer Insulation

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jpsmith123
Sun Apr 24 2011, 09:02PM Print
jpsmith123 Registered Member #1321 Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
I'm wondering, has anyone ever tried to use silicone self-fusing tape as layer insulation in a HV secondary coil?

This stuff seems to have a high dielectric strength, a very low dissipation factor, and a wide temperature range.

Supposedly it's also corona resistant and recommended for high voltage applications.

Lastly, at $10.50 for a 1" x 0.020" x 12yd roll, it seems quite inexpensive.

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magnet18
Sun Apr 24 2011, 09:08PM
magnet18 Registered Member #3766 Joined: Sun Mar 20 2011, 05:39AM
Location: 1307912312 3766 FT117575 Indiana State
Posts: 624
"Insulation for Radioactive Environments"

If it does everything it's supposed to, you can bet I'll be buying some soon...
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Patrick
Sun Apr 24 2011, 10:58PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
It looks like they sell to individuals, by the specs this looks excellent, like that yellow thin stuff for insulating transformers. I find silicones the most difficult to get, except for the tub and tile stuff.
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Pinky's Brain
Sun Apr 24 2011, 11:16PM
Pinky's Brain Registered Member #2901 Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
Haven't used it, but in Europe the brand Cellpack seems easy to find (Conrad amongst others has it) and is marketed for high voltage use.
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jpsmith123
Mon Apr 25 2011, 12:08AM
jpsmith123 Registered Member #1321 Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
This stuff might be just what we need...or it might turn out to be useless. I'm going to order some tomorrow and find out.

One reason I ended up concentrating my efforts on segmented windings rather than layer windings, was the problems I was having working with the various types of layer insulation I experimented with.

Anyway, another potentially positive feature might be the 20 mil thickness - it should help reduce the field stress and lower the capacitance.
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Adam Munich
Mon Apr 25 2011, 12:22AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Maybe this is the perfect tape for making fryback transformers? Anyone want to try, because I'm not spending another 20 something hours winding one...

...although, using only 1 layer of tape would cut down on the time dramatically...
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magnet18
Mon Apr 25 2011, 12:39AM
magnet18 Registered Member #3766 Joined: Sun Mar 20 2011, 05:39AM
Location: 1307912312 3766 FT117575 Indiana State
Posts: 624
Grenadier wrote ...

Maybe this is the perfect tape for making fryback transformers? Anyone want to try, because I'm not spending another 20 something hours winding one...

...although, using only 1 layer of tape would cut down on the time dramatically...

Send me the wire, core, and tape and I'd be more than willing to give it a shot, I'll be sure to let you know how it goes wink
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jpsmith123
Mon Apr 25 2011, 01:57AM
jpsmith123 Registered Member #1321 Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
I've already spent so much time (and money) on building a transformer...I say what's a little more?

Actually, it's been a learning experience where I'm trying to teach myself basic machining and at the same time trying to design and build a mechanically rugged, electrically robust, high powered, highly efficient HV transformer.

And, finally, it's almost done now, as I've found what appears to be the perfect epoxy to encapsulate it with, but this silicone tape stuff has me really curious...

Grenadier wrote ...

Maybe this is the perfect tape for making fryback transformers? Anyone want to try, because I'm not spending another 20 something hours winding one...

...although, using only 1 layer of tape would cut down on the time dramatically...
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Patrick
Mon Apr 25 2011, 03:19AM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
jpsmith123 wrote ...

And, finally, it's almost done now, as I've found what appears to be the perfect epoxy to encapsulate it with, but this silicone tape stuff has me really curious...

What epoxy?
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jpsmith123
Tue Apr 26 2011, 02:12AM
jpsmith123 Registered Member #1321 Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
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