chance to visit http://www.educypedia.be/electronics/javamotor.htm and found interesting links
saw these [flash=400,400]http://fisik.free.fr/ressources/MccComplet.swf[/flash]http://fisik.free.fr/ressources/MccComplet.swf and
[flash=400,400]http://www.gearseds.com/curriculum/images/figures/dcmotor.swf[/flash]http://www.gearseds.com/curriculum/images/figures/dcmotor.swf
i think i need to redesign the behavior of the split ring to rotate instead of the original stationary design.

http://www.fairlysimple.com/applets/21Electromagnetism.dcr
like. give context to use of dc motor

http://www.walter-fendt.de/ph14e/electricmotor.htm
most popular java applet on DC motor simulation by W. Fendt