Now how about the special case when 3-pole armatures are used? I've found that a coil is shorted when the pole is directly in line with a magnet stator pole instead of between the poles...
In response to Edison123.
Have a look then at all the brushes being in the wrong locations compared to real world DC motors:
Wrong locations:
http://electriciantraining.tpub.com/14177/img/14177_56_1.jpg
http://www.electrical4u.com/images/COMMUTATION-IN-DC-MACHINE.jpg...
We are not talking about interpoles here. Only about brushes being over the field poles OF EVERY DC MOTOR and not between them like motor theory books state. It's clear that the throw angle of the wires coming off the comm bars that is under the brushes puts the windings in the neutral plane...
I know its not static. Sometimes they may advance the brushes a few degrees I've seen to help the armature reaction at a specific load point. I don't work around the big daddy DC motors that have interpoles and compensating windings. Only the small boys that are no more than 25 horsepower...
SO basically what you guys are saying is that the coils of wire are under the neutral plane but the comm bars are energized by the brushes in the location over the magnets/poles. Hence, the reason for the brushes being located over the field/magnets instead of in the neutral plane as books like...
Can someone tell me why books say the neutral plane is between the field poles and the brushes are there too for DC motors, but every real world DC motor I've seen, the brushes are always over the stator fields and not between them like books portray?
