F.B.D.I.S.S.M - Flux.Boosted.Dual.Induction.Split.Spiral.Motor.

[Paul-R]

An electromagnet in somekind of horseshoe arrangement would have both the poles from the electromagnet firing at the rotor.

Using a horse shoe electromagnet wouldn't work any good in this design.
The rotor magnets does not change polarity.....

Yes. but supposing you had two stators and two rotors on one shaft, one stator with N facing in and the other stator with S facing in. And the electromagnets would bridge between the two.

Don't forget that the benefit, the OU, will include the back emf reclaimed when the electromagnets switch off, and so, you will need a pair of capacitors and a bridge rectifier and a battery to capture this lot.

Otherwise, you could have the BEMF on one revolution being used to do the job on the next revolution.

Not very clearly explained, I fear.

Paul-R

[acp]

 Paul-R,

Yes, it's a good idea, We'd already discussed this idea earlier , but probably not very well explained!  pancakes and whatnot! I think this is a good idea as then the flux lines would have a much more closed path, and the force available at the pole of the electromagnet facing outward would not be lost, as it is at the moment. At any rate, it would be very difficult to build.

[Honk]

The main problem of a horse shoe electromagnet is forming the steel laminets into the right angle and size.
Paul is just using a single rod electromagnet of Supermalloy and that is doing just fine.
Supermalloy is the prefered material to use but very expensive and very hard to get hold of.
Using plain Oriented Silicon steel with an outer tip of Non Oriented silicon steel should do the job as well.

Oriented Silicon steel produces a lot more magnetism per amp than regular Non Oriented silicon steel.
But it's not a good idea of having Oriented Silicon steel facing the moving Neo magnets.
Oriented Silicon steel requires non moving fields accros the surface to avoid losses. Like a transformer.
This is why Oriented Silicon steel is never used in motors. But if the steel area facing the Neo magnets
is made of Non Oriented silicon steel and the core inside of the winding is Oriented Silicon steel then
we have the best combination of two cheap materials. The core produces lots of magnetism and the
outer tip of Non Oriented silicon steel transfer the magnetism towards the moving rotor magnets.

The steel laminates I'm going to use for the rod magnet will be precision laser cut to fit perfectly.

[Honk]

Otherwise, you could have the BEMF on one revolution being used to do the job on the next revolution.
Paul-R

The Back EMF will simply not be enough to run the coil.
You are right that there is Back EMF to be captured but this is no way near the power needed to keep
the magnetic field constant in the electro magnet while the rotor magnet passes by.
Lot's of energy going into an electro magnet is converted into heat.
The perfect coil don't have any resistance but in real life there is ohms law to be included.
There is also steel losses that is converted into heat as well. I guess I'll be happy if the recovered Back EMF power
covers 10-25% of the total energy needed to run the coil in this type of motor.

[Paul-R]

Otherwise, you could have the BEMF on one revolution being used to do the job on the next revolution.
Paul-R

The Back EMF will simply not be enough to run the coil.
You are right that there is Back EMF to be captured

If the switching is sharp, the BEMF can be very high indeed. It is an important ingredient in the energy equations:
http://www.fas.harvard.edu/~scdiroff/lds/ElectricityMagnetism/BackEMF/BackEMF.html
As I understand it, it depends how sharp the voltage is taken off the coil - how vertical, or near vertical the vltage drop is.