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

[Honk]

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. They are all facing the same direction, e.g in attraction mode towards the stator.
If I would use a horse shoe electro magnet it would apply both north and south polarity when activated, thus attracting and repelling
the rotor at the same time. The single rod electro magnet allows me to attract the rotor magnet into the electro magnet area.
Ones in place I flip polarity and repel the rotor magnet into the next loop. This can't be done so easily if using a horse shoe magnet.

Could you please post the Entry Femm to? Thanks in advance.

[acp]

both files attached.

Yes I see what you mean. you would have to have two rows of rotor magnets and stator magnets, one on top of each other in reversed polarity in order to use the horse shoe idea.

[Honk]

Yes, thats right. I have thought of that idea to but it feels to difficult to build as a prototype.
Perhaps I'll try the dual pancake motor horse shoe idea if the prototype motor works out good.

You told me you got 50.85Nm in the spiral entry position simulation using N37 neos. That equals to 37.5 ft-lbs.
Today I recalculated the force at grade N37 using my own formula and I got 42,7 ft-lbs. I was surprised how
close my calculation was to the Femm simulation. There is only a 12% difference between torque values.

I feel this shows I'm on the right track.
Later when I have added all features, like the final shape, both electro magnets and back iron, you could
perform another simulation to see if more of the flux lines go were we want them to, e.g between the rotor and stator magnets.
I guess adding back iron will focus the flux lines the most possible.

[acp]

Yes, Honk,  In real motor the flux of the stator magnets will loop under and over the stator magnets, which it can't do in the simulation because of the closeness of the stator mags to each other, this is reducing the effectiveness of the mags in the middle of the stator ramps. So probably the torque will be higher than in the sim. That seems to fit with your calculation.

The dual pancake thhing would be very difficult to build..... but maybe more efficient, Would it be twice as efficient? because the electromag would only need the same electrical power as in your original design, but there would be twice as much torque because of the stacked stators and rotors. 

[Honk]

Would it be twice as efficient? because the electromag would only need the same electrical power as in your original design,
but there would be twice as much torque because of the stacked stators and rotors. 

I believe there are other forces that determine the amount of electro magnet power needed, while running the motor.
When the rotor magnet is approaching the electro magnet it will induce an electrical current in the coil that will have
to be fighted by the input current. The faster the spin, the more powerful induced current, thus requiring more
power to overcome the sticky spot. This is why Pauls E.m.i.l.i.e needs current pulses of 1000W while running.
My only hope to reduce input current, is the Flux Booster controller, that greatly reduces the power needed
to operate a high inductance coil at high speeds with very sharp flanks.
The Booster initialization of the electro magnetic flux field will be square instead of the regular slow rise time.
Ones initialized it only takes static current to maintain the strong field. When turned of the Back EMF is recovered for next cycle.
I will also redesign the controller to handle Magnetic Flip Field. Meaning immediate change between north and south polarization.