Quote:
Originally Posted by Barrowman
I've been reading through this old thread and wondered what you might think of having lots of magnets around the wheel rim and coils placed close to them so the whole thing becomes the generator. Does that seem practical at all?
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I'm not that good with electrical motors, but I think there might be at least 4 reasons:
- Required precision of making/keeping the wheel's rim true, as mentioned above,
- Keeping the magnets and coils in a compact housing (in the hub or external alt/motor connected via pullies/gears) reduces the rare/expensive materials needed,
- Having the forces in the center vs on the outside... something about torque, leverage whatever,
- Magnets on the rim will increase rotational mass, might not be that bad for smooth operation.