Electronics > Projects, Designs, and Technical Stuff
Custom transformer calculation
T3sl4co1l:
A transformer is a transformer, doesn't really matter how you're using it.
Power companies use CTs for parasite-powered fault detectors that hang on power lines. Those only need a few watts of course (though they'll absorb hundreds under those momentary fault conditions). CTs are also used for mechanical power in power and industrial application (i.e. powering a relay). 20W isn't unreasonable, you just need enough cable to carry the current.
Tim
David Hess:
Rotary transformers are a real thing and do not require any winding and unwinding.
https://en.wikipedia.org/wiki/Rotary_transformer
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