sometimes we develop to innovate, as well as sometimes we develop just to have the satisfaction of saying we made it ourselves. Yet there is one more reason to construct something ourselves: To learn, just as [Fraens] has done with this 3D-printed generator. (Video, embedded below.)

[Fraens] starts off with a jig for winding the individual coils, however then the jig itself snaps into a the stator ring. The stator ring is sandwiched by two rotors which rotate on a brass shaft suspended by needle bearings. With the exception of the hardware, all the structural parts are 3d printed.

What really separates the generator develop isn’t how it’s built, however rather how [Fraens] has put it to use as tool for learning as well as experimentation. By plotting input torque vs electrical output, [Fraens] is able to determine efficiencies in multiple configurations, as well as has some interesting conclusions to share toward the end of the video. We appreciate how the documentation as well as analysis help iterate the style towards higher effectiveness as well as will inform the next build.

With some more work, we can see this going straight into a vertical Axis Wind Turbine or attached to a Pelton Wheel for an off-grid hydro-power setup. thanks to [Shabab] for the terrific Tip!