PCB coil to replace hand wound coil for inductive charging

[Tilman]

We want to replace a wire would coil (parameters and photo see attachment) by a PCB coil as transmitter coil for inductive charging.
We designed the coil according to the original dimensions (except thickness of conductive path).
Unfortunately, the receiver coil does not detect charging current.

Do you have any tipps, what to consider or to modify?

Many thanks in advance!

 

[Skogsgurra]

Sure. But if he needs a core as well, it wouldn't help much to remove the shorted turn from the transformer.

Gunnar Englund

http://www.gke.org

--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.

 

[Tilman]

Hello IRstuff,

I tried to dremel the shield layer away. Unfortunately, as it`s a flex PCB, the layers are so close to each other that I was not able to do it without damaging the coil.
I will need another production run without shield.

 

[IRstuff]

You can spot etch copper, although getting the acid might be challenging in certain countries.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

faq731-376 forum1529 Entire Forum list

http://www.eng-tips.com/forumlist.cfm

 

[jimkirk]

Your photo of the original coil looks like it's made of Litz wire, hundreds of separately insulated conductors in parallel to mitigate skin effect at high frequencies, so Q may very well be a factor.

 

[MacGyverS2000]

If it's flex, use an X-acto knife to cut it out and peel it away from the other layers... some judicious heat can help here (delamination of flex due to high heat is a common re-work mistake, so make it work for you).

Dan - Owner

http://www.Hi-TecDesigns.com