Double permanent magnet generator

[BilPrestonEsq]

So I can't seem to find out why generators aren't designed so that the coils are passing in between TWO magnets N facing in and S facing out, and then S facing in N facing out etc. The flux density between two magnets is obviously greater and the flux lines are 'straighter' (more lines of flux perpendicular to wire in coil). Anyone?

 

[Averagesupernova]

I must not understand you correctly because I thought that is the way permanent magnet motors are set up and they generally make pretty good generators, or at least as good as a permanent magnet generator can be.

 

[BilPrestonEsq]

I am pretty sure they don't have two sets of magnets one inside the coil and one outside the coil. Atleast I haven't found any designs like that.