First post here and my first doubt (safety concern)

[Low-Q]

Hi, I am Alejandro, 43 years, from Uruguay, South America.
My question is: are permanent magnet motors out of control devices? I mean, how is the start/stop procedure? 
Of course I am not referring to motors that use electromagnetic shielding.

Yes they are out of control motors - no one has ever got one working. No control, no clue.
Unfortunatly true in most cases. All "working" magnet motors this far has been frauds. I look very much forward to the day we finally know how to do it right.
Many theoretical motors that "works", but they always works differently in practice...

Generally speaking: A magnet motor will account for all forces and counterforces for each revolution of the rotor. Basically this means the rotor find its very same potential for each time the rotor passes tits initial base. So therefor, and for that simple explanation, a magnet motor will not work - unless some genious find a way to make magnetism extracting energy from somewhere else. But then that "somewhere else" will loose its potential energy level as we use it...

Kinetic energy is all about balancing two different potential levels. In the period this balancing are finding place, it can do work. Ofcourse, MAKING this inbalance in the first place, will also require energy input by balancing energy levels from somewhere else. So a magnet motor will work as long someones hand are forcing the rotor to turn around - as seen thousands of times on youtube...

IF a magnet motor worked, it will probably NOT go out of control. The torque are limited to the force provided by the magnets, and the maximum energy output of such a device relies on these forces per meter, times revolutions per second - or something.
Vidar