Electronics > Projects, Designs, and Technical Stuff
Copper Foil/Tape with Reinforced Insulation: Does it Exist?
(1/1)
TimNJ:
Hi everyone,
For those who may work with power electronics, specifically transformer construction, maybe you will have an answer to the following.
I'm trying to meet a very low secondary DCR target on a miniaturized transformer I'm working on. I'm considering using copper foil, but I think it will be impossible to meet the primary-secondary creepage requirements of EN60950. The bobbin winding window width is just shy of 4mm. I also need 4mm creepage for EN60950, so according to my initial analysis, I can't see how that will work. (With a larger bobbin winding dimension, meeting the creepage requirement is much easier.)
Has anyone used any kind of reinforced/triple insulated copper foil in transformer design? Does it exist? If so, how would you terminate to it (flying wires) without violating safety requirements.
I know this is pretty niche, so if you have any other ideas or input, I'd appreciate that too.
Thanks!
T3sl4co1l:
Possibly. I'm not sure that I've seen that, but I have seen foil wrapped with tape, which does the same thing of course but with more labor.
Is a planar transformer an option?
Tim
TimNJ:
--- Quote from: T3sl4co1l on May 01, 2019, 03:36:44 am ---Possibly. I'm not sure that I've seen that, but I have seen foil wrapped with tape, which does the same thing of course but with more labor.
Is a planar transformer an option?
Tim
--- End quote ---
Thanks for your reply.
I found this supplier: https://en.cmc.de/page/kupfer-abschirmband
But I don't think it's anything more special than pre-cuffed copper foil, using typical PET or Kapton materials. I suppose I was wondering if there was a coated/dipped tape available, similar to triple insulated wire. Looks like probably not.
Planar is looking more and more like the answer. Estimating that I still need to cut the copper losses in half or more, with an already maxed out winding area.
Thanks again.
Navigation
[0] Message Index
Go to full version