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pulse transformer to trigger SCRs - roll yer own?

I have a .75 inch diameter toroid core I picked up surplus and I would like to wind a simple pulse transformer (aka trigger transformer) to turn on a back-to-back SCR pair for a one-off project (it's an etch tank heater). The core had two windings of 8 turns on it (18 guage - not bifilar) and was apparently made by Pulse. I measured the inductance of the 8 turn winding and it was pretty low (2 uh on a cheap multimeter L scale) so I'm guessing a fairly low mu ferrite.

I have some #30 AWG magnet wire lying around. Will winding it around once with a trifilar winding be likely to work or is it much more involved than that?

Haven't found much info on winding these things on the net.

Any suggestions or net resources would be appreciated. TIA. mr coffee

Reply to
sterling_sound
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I only use cores that come with data sheets.

D from BC

Reply to
D from BC

Have you tried just using it as is? It's only a transformer, after all.

Good Luck! Rich

Reply to
Rich Grise

Pulse transformers don't comply with "normal" transformer theory. I never did have an application were it was critical though, so, so far, I've been able to get away with 'round about' numbers.

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Reply to
John Tserkezis

Every pulse transformer I've made (typically with bandwidth from 1 to 20kHz as the minimum requirement, on up to 10 or 20MHz typical cutoff frequency) has worked like a transformer, and most closely like a transformer with lumped constants considered (L, LL, C and DCR).

Tim

-- Deep Fryer: A very philos>

never

Reply to
Tim Williams

Since when; physics is physics.

Physics is physics.

--
 JosephKK
 Gegen dummheit kampfen die Gotter Selbst, vergebens.  
  --Schiller
Reply to
joseph2k

Here's a great high side Mosfet gate driver where you might glean some useful info.

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Enjoy, Mike

Reply to
amdx

skrev i en meddelelse news: snipped-for-privacy@i38g2000prf.googlegroups.com...

It probably works - for a one-off garage project. I would use teflon wire-wrap wire though to get some (not safety rated!!!) insulation. It is better to just buy one, I think.

Reply to
Frithiof Andreas Jensen

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