PM = permanent magnet.

I guess your motives are unclear then. I understand you want to generate
electrical energy form a mechanism installed on your whel chair wheels. A
generator would be the only way to do this whatever the mechanism.

Is my logic too far off?

-----------------

"Hactar" wrote in message ...
PM? That sounds like a moving-magnet generator to me, which might have
problems if I stop, which I might do for an hour or two.