Bike Lights, magnetic induction

Projects
21

update 1 after testing and toying with the first prototype. This is mainly for my peace of mind mostly.

noted problems:

  1. Rotor movement; to much friction/drag of the rotor around axis.
  2. Alternative model using a regular bearing as rotor showed better movement.
  3. Axis material; between using a plastic rod and metal screw as rotor axis, the metal one seemed to require more rim speed/ closer spacing than plastic axis.
  4. Wheel material; aluminum rims def. work for eddy currents, for steel rims it seems not so, but magnets/rotor got sucked straight onto the rim.

to test next:

  1. build stator to scale for rotor bearing
  2. test different axis materials for the rotor
  3. determine how much power is generated
  4. finish a rig for proper wheel mounting
3 Likes
22

Do you have pictures?

23

nope, none other than the ones besides up already. I can put a video of showing the effect of Eddy currents in action. Amazes me every time I see it.

1 Like
24

Everyone has these in Denmark… My friend an I were surprised it wasn’t a thing in North America…

26

27

Is that your prototype? If you’re at VHS for the open night tonight, I’d like to see where you’re at with this!

28

I’ll be there tonight.

This is a prototype I made for mounting on a drill to get an idea on how much current I can generate.