Over saturation of laminates ?

[Spaz]

Ive been converting a small single phase 1/4Hp moter that I got for free. I made a new armiture and placed some neos and tested it. The neos were small N grade 9 lbs of pull. On the run coils i originally got 5.24 volts each 4 coils total @ 1400 rpm I thought I could improve on this so I doubled up on the magnets closeing in on the gap.Gap now 1/8th of an inch. Ran another test on the run coils this time my voltage was lower 3.57 volts each.Am I getting iron losses from eddy currents in the teeth from being too close and if so is there a general rule of thumb for distance between magnets and laminates for the best concentration thanks

[Flux]

You will have to give more details, preferably with pictures of the 2 magnet arrangements.

What gap? air gap or gap between magnets. Did you double up with one magnet on the other or were they side by side.

If you increase the flux density you will increase the iron loss but it will not lead to a reduction of volts.

You either did something to give you less flux density with more magnets or you changed the flux path in relation to the coils so that although you may have more total flux the coils are linking less.

Flux

[ghurd]

If you doubled the magnets, and the gap is now 1/8", I would have expected the voltage to over double.

A 1/4HP motor at 1400RPMs making only 5.24V has some problem with not enough magnet or too much gap.  Maybe something more basic.

Not enough info to go on.

G-

[Spaz]

perhaps I made a mistake I may have checked it while in parallel. I still do'nt have any usable voltage  for 12 volt charging. I may swap out for larger magnets and i'll label wires this time, if that doesn't give me anything usable at least the motor didn't cost me anything

[ghurd]

This is a 1750RPM motor?  120 or 220V?

"i originally got 5.24 volts each 4 coils total"

Have you seperated the the coils and get 5.24V per coil, or 5.24V for 4 coils in series?

Something basic is not right.  The problem should be too much voltage, and at a Much lower RPM than 1400.

I expect not enough magnet area.  You never said anything useful about the magnets.

The magnet are grouped all N, then all S, then all N, then all S?

A couple photos would help.

G-