Anyone played with Planar Transformers?

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Hi!


I have bought one of this cute transformer in a shop:
http://sziget.mine.nu/~danko/aramkor/zsakmany-kuuul/dscn8130.jpg
http://sziget.mine.nu/~danko/aramkor/zsakmany-kuuul/dscn8133.jpg

It's a planar transformer. Unfortunately, at the shop thew know nothing about this.
Does anyone know something of it? What is the primary:secondary turns ratio?
What is the optimal operating frequency?
Yes, i have goooooogled, but I have found nothing.
On the Payton Group website I couldn't find this trafo.
 
Unfortunately, I don't think that planar X-formers and transformers in general are so systematically part-numbered and labelled that you can identify one from the markings.

Many surplus parts were custom made for industrial customers, ans specs are not public, and the part number is not an off-the-shelf part.

You'll just have to measure pri/sec inductance with an inductance meter. To determine ratios you'll need to feed a known amplitude sine wave from a waveform generator into one winding and measure the amplitude at all other windings. You know which terminals pair up as windings from DC resistance measurements.

What application are you trying to use this for?

Most planars tend to have relatively few turns (too few for a mains-fed SMPS)
mostly, they are used in telecom (48V) applications, where low-voltage/high currents are used.
 
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