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

[Low-Q]

Honk,

Maybe you should use an air coil instead of one with iron core. The magnetic flux from all the stator magnets closest to the iron core, will be "busy" with closing a magnetic loop via the iron core in the coil. The same will happen with the magnetic lines in the next stator magnets to come. This will in turn weaken the attractive force between the stator and the rotor magnets, and you will at the end not get the desied acceleration of the rotor to pass the sticky spot - which hopefully will be dealt with by the air coil. With an air core you unfortunatly must have more electric current to make the same magnetic flux, but hopefully the more spread magnetic flux in the air coil, will cover a bigger area, helping the rotor magnet to pass the sticky spot.

Should this be something to consider?

Br.

Vidar

[Honk]

No, I dont think an electro magnet with an aircore will provide enough flux.
The purpose of the core material is to amplify the induced flux from the copper wire and the
permeability of the core material determines how much flux will be created by the applied current.
Using an air core you will get a flux strength approx 500000 times weaker than using a Supermalloy core.
And another bad thing with an air core is that only the flux created at the coil opening facing the rotor magnet can be useful.
Nothing of the flux created in the rest of the air coil will affect the rotor, simply because there is no metallic core to to conduct
the flux towards the rotor magnet. Air is just the worst case material possible to conduct magnetic flux.

Yes, some of the flux from the closest stator magnets will leak into the electro magnet core and this will shift
the BH curve working point, but I still believe the gain in using a solid core of good magnetic properties is the way to go.

[gaby de wilde]

And another bad thing with an air core is that only the flux created at the coil opening facing the rotor magnet can be useful.

This is a good concept I think.

http://forum.go-here.nl/viewtopic.php?p=368&highlight=#368

Your flux booster rotor can be combined with this design.

[Honk]

It's my pleasure to tell you guys that I have completed all the cad drawings of the F.B.D.I.S.S.M
The next step is to check when my laser friend have the time to cut the material.
There's a lot of parts to be cut due to the stacked build-up of metall plates.
I will also place several price quotes on the custom made magnets during this week.
Once the motor is assembled I will order the magnets and finish the final motor.

Meanwhile I'll focus on the Flip-Field Flux-Booster Controller.
I estimate to have it built and tested well before the motor is completed.

One of my suppliers have reported that he can get Supermalloy from USA but
it's expensive. He will see if he can get it somewhat cheaper from China.

[Honk]

Honk, you don?t use both poles of your magnets, so you are wasting 1/2 of the possible power.
Just redesign it to use both magnet poles!
Just use "U" shaped rotor and stator magnets or just use bar magnets with a core, so they are "U" shaped all in all !

Good luck !
Regards, Stefan.

I don't follow exactly how you mean I should do this?
Designing a dual motor using horseshoe electromagnets that are bent into a the pancake motor would be
a simple task to the design your are suggesting, I think.
Perhaps you could explain the "U" shaped rotor more thoroughly?

Considering this will be my first prototype I don't think I want to make it to complicated to build.
But if the design you suggest is easy to insert in the existing design I might consider your proposal.