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Thanks, 3d designing it and building it would not be a problem, the most difficult part for me would be to know which magnets to use, how many and what coils to use. If you have ways to calculate these parameters, I could make and share a good axial-flux design :-)
At the moment I didn't found any useful ones (they use round magnets, produce a low amount of energy or require higher speed to produce 12V).
Any help would be highly appreciated ;-)