In a power supply unit, I found an electromechanical part that I had never seen before and whose function is completely unclear to me.
It is a Hoefer 500xt power supply (google for pictures)
Inside is a part with two "wings" that hum when switched on and wave back and forth at a 50Hz rate.
They move the air and maybe keep insects away, I don't know.
What's that supposed to mean?
(3 votes)
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For the first time. Perhaps this is a particularly clever solution for a particularly quiet or low-wear fan?
Update: I think it will be something in this direction. At least this looks quite similar to that of you:
https://piezo.com/pages/advantage-of-piezoelectric-fan-technologydevelopment
Hm, strange. In the power supply it is far from any component that could release heat.
Quite spontaneously, I would think of something in the area of capacity or induction. Unfortunately, there is nothing to be recognized (thanks to it). Either the capacitance of a capacitor changes while the opposite plates change the distance or the inductance of two coils changes. Lastly, it would be conceivable that the vibration has a type of braking function, since the air resistance becomes effective. I don’t know exactly what is being braked there and brought into a generally less escalating sinusoidal vibration (e.g. any switching clock).
Hits on Google:
Piezoelectronics
https://www.diyaudio.com/community/threads/a-look-at-some-electrophoresis-hv-power-supplies.307168/
Merci for the picture. I didn’t demonize it, so I didn’t see the type designation.
Both make no sense for me right now. Why should a capacity be changed in the cavity of a power supply? Or the air swing?
Yes, as I said, Piezo is here at work. Piezocrystals vibrate when supplying electrical voltage and they generate electricity when subjected to mechanical stress. One or both effects are obviously useful for device control.
Fully slanted. I can’t imagine any technical application, especially since no interactions between space and the swinging lugs are sinn-inspiring, and only the two wires lead to the part for the excitation.
Maybe there’ll be more.