Thanks for the link Steven.
One question: what software is it you use for electro-magnetic FEM analysis ? I've tried in the past modeling with mech. eng. FEM packages and that wasn't succesful (though should be doable). I'd be interested in learning what software it is and whether the learning curve is steep (for someone already with FEM).
I had noticed it before in this link (http://www.powercroco.de/magnetkreis.html), which triggered my interest. Nothing beats a bit of quick on-screen analysis and playing around with parameters (size of magnets, airgap, etc.)
I'm a little surprized by your field strenghts (1.65-2 T); I recall Neo magnets having a field strength (at their surface) of about 1.2 T (varies with grade); is the tooth saturation a consequence of the 'focusing'/attraction of the magnetic field lines by the stator tooth ? I.e., half of the stator is iron, half is air, so field strength in the tooth is doubled ? (minus a little for airgap between the magnet and rotor)
I definitely need to brush up on this part of theory...
Regards,
Peter.