Generator / motor disc/rotor to experiment with

thingiverse

You have 10 holes for magnets, you could put 1 or 2 or all 10 in there. They could be up to 1 cm diam, and from 1mm to 4mm thick . (If you have less than 1cm diam, you will lose the interferance fit and will need aid of adhesive.) If you have thicker magnets, you could drill the holes deeper probably a few more mm at most, you could maybe drill 1mm increase in diameter, 2 if you like to walk on the wild side ... This disc-rotor is 1cm thick so I recommend no more than 50% infill, (unless u have alot of extra time, filament is cheap and your printer is ultra fast) .. I posted the pics of the inside of a 200w rated DC scooter motor for 24v, - you see 4 ceramic magnets, 4 brushes and probably 18 commutator sections - this 3d printed motor disc might make 1/100 of that power maybe 1/20 -- the rotor disc had the intention of a field coil on the perimeter for the 'kick' for rotation, - and one could precisely time a 'pulse' with the use of hall effect sensor to further increase efficiency so that the coil was not on consuming power for the whole time, -- of course if you have all 10 magnets, it just about might need to be on close to full-time .. Then there is (for contrast) a toy DC motor, all DC motors can also be generators when the axis is turned. I put 6.3v to the tiny 13gram motor (I think it was rated for 3v) and it sounded like it was going to self destruct and got hot fairly quickly - but at that voltage it was showing 7-8 watts - i'm sure several thousand rpm. You can see the commutator has 3 seperations, making it a 3 phase motor - 2 magnets and 2 brushes. The power meter showed the voltage , amps and watts (power). The version 3 disk now has recessed holes for 10mm magnets (that , my recent batch 10x3 measured to diameter of .388 " ) - have a nice tight interference fit (no glue needed)