Rosalinekavitha
Member level 1
How to choose optimal wire width of spiral coil to attain high q factor? There are formula to calculate optimal turns n pitch. Is it by trail n error to choose wire width?
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Hi,
High Q means low loss.
What are the losses in a coil?
* core loss --> choose a core that is suitable for frequency and flux
* ohmic winding loss --> choose wires with high (overall) wire cross section, and short length if possible
* loss due to proximity effects --> chose useful layer stacking
* loss due to skin effect --> choose HF litz instead of one solid wire
* others?
For each of these effects there are numerous documents, tutorials, application notes, calculations ... in the internet.
Thus: No, it's no "trial and error".
But as with every development: it starts with your requirements.
Frequency, waveform, currents, size, cost, Q factor.....
Klaus