You should reverse the connections to alternate coils for this winding. If you get current into a 24v battery at 1000rpm I believe you have done this correctly but you can check.
You will never get much with wood. I am not sure what you mean about the banding.
What you need to do is roll the banding around a plywood disc with a diameter equal to the inside of the magnets and keep rolling until you make the diameter up to the magnet outside so that you have a ring of steel for the magnets to sit on. This will be as effective as a solid steel disc and should drastically increase the output.
You could make it even better if you made another disc like this and spun it with the other one with the magnets. Your stator coils would then work in a true "air gap" between these laminated steel discs.
If you can't manage to spin the second disc you could leave it stationary behind the stator and still gain output but at the expense of iron loss and drag.
If you just use the one steel disc with magnets and keep it single rotor without return flux paths then you need to keep the stator as close to the magnets as possible ( less than 1/8").
The big problem with this type of construction is keeping it stable, you will need to glue the banding as you wind it with epoxy or similar. If you don't the magnetic forces will pull the thing apart.
Not such a problem with one disc alone but if you add a second either spinning or stationary you will have a strong pull trying to spiral the strip out.
This seems stupid hard work compared with a solid steel disc but if it keeps the Missus out your hair you should be able to make it work. Be careful with that banding strip, if the magnets pull it out don't have fingers between it.
Don't put any form of iron in the coils.
Good luck
Flux
[ Parent ]
