i can't find much information on these, but its interesting to me because i thought of the same idea, i did a patent search and found patents for Electromagnetic Turbo Generator and Permanent Magnet Turbo Generator. It works by using magnetic bearings plus no physical connections to the levitating central magnet giving absolute zero friction. In the PM which is what i thought of it would use another smaller magnet towards one end of the central pin with a coil around it, to apply current to, to get motion.
As i was thinking about it i was thinking without friction it would have to produce more energy than put in, because something without friction to slow it down will spin forever. But there is only one possibility of friction other than the very slight rub against air which wouldn't have hardly any effect at all, but also i was wondering if friction is created when elctrons are generated, when electrons jump into the coil, does that process alone cause friction?> Even in the case it does cause friction, is enough friction to slow it down enough to make up to conservatation of energy? I will try to build one either way, but i would like to hear some other thoughts.
As i was thinking about it i was thinking without friction it would have to produce more energy than put in, because something without friction to slow it down will spin forever. But there is only one possibility of friction other than the very slight rub against air which wouldn't have hardly any effect at all, but also i was wondering if friction is created when elctrons are generated, when electrons jump into the coil, does that process alone cause friction?> Even in the case it does cause friction, is enough friction to slow it down enough to make up to conservatation of energy? I will try to build one either way, but i would like to hear some other thoughts.