PCB routing under a transformer

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#1
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Hello,

I'm doing a high voltage source PCB, where the source is a transformer and controlled by an oscillator. The frequency of the setup is around 75-100kHz.

The transformer type is very similar to this one: https://malaysia.rs-online.com/w... .

My question is if I can make a copper area under the transformer?

Won't stray magnetic fields from the transformer create eddy current in the copper below? And won't this affect the performance of the oscillator?

Thanks,

David

There are pointy haired bald people.
Time flies when you have a bad prescaler selected.

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Such transformers used to be bolted to metal chassis without any problems.

Leon Heller G1HSM

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The question is whether copper under the core can form a shorted turn. For that to happen, the copper has to be in a position to cut lines of flux, which I think is unlikely with that kind of pot core. It's more likely to cause problems underneath small switching regulator cores, especially those that don't have a completely closed magnetic path and have windings parallel to the PCB. For those, I always put an open area underneath. In one extreme case I had to carry a break in the ground plane all the way to the edge of the board to suppress induced noise.

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Thanks for the info guys.

There are pointy haired bald people.
Time flies when you have a bad prescaler selected.