WTB: GS500 Rotor (I have Goat's)

[noiseguy]

I think that the poles need to be phased the same, and in multiples of 3. So, either 6 or 3 magnets. Otherwise you won't get 3-phase power out of it... you'd get something else. The stator has 18 poles... I'm not even sure if it would work with 3 magnets... I'm not sure there.

The distance thing would be tricky... more powerful at farther distance... strength falls off exponentially as distance is increased... this would need to be tightly controlled. I'd be tempted to glue a piece of steel on top to set the air gap to the right distance.

I wouldn't use a soft adhesive. You'd be creating a wicked spring-mass system on the rotor at operating speeds. You need a nice, hard, high strength epoxy.
..
Curved magnets are available from these guys... looks close. Would be closer than a flat one, anyway. Thing is, at $9/pc, not sure that this is really any cheaper that just sourcing a used rotor.



http://www.kjmagnetics.com/proddetail.asp?prod=AX2C45%2DN