so even if teals system uses a electromagnet to pull on a piece of iron, which lacks its own magnet field, the eddy currents created will AS I SEE IT produce a back emf in the coil the ordinary way? correct me if I'm wrong here.

maybe that the back emf is present but way smaller than ordinary?
OR there are some other things in work here.


Lars,

Just to clarify one more time. There is ALWAYS back EMF in a COIL, both when it is energized and when it is discharged. This is caused by Lenz Law and is responsible for the "rise time" and "decay" characteristics of the current in the coil. In the attraction motor, where only an iron piece is attracted to the magnetic poles, all of the back EMF effects remain in the COIL and do not appear in the ROTOR or affect the generation of mechanical energy. In an ordinary induction motor, the current carrying conductors on the rotor also have a reverse generated voltage on them produced by their movement in the magnetic field of the stator. This effect is absent in the magnetic attraction motors I discuss. This situation produces a new set of advantages that are not present in other designs.

You seem to have plenty of interesting ideas to explore, and probably should wait to buy the DVD until others build some working models. You can always catch up later.

Peter