Possible permanent magnet motor working in attraction mode

[idnick]

Thanks for the clearer explaination and the anamation program info.

Dave

[tsakou]

Hi all, I need you all to think on this one here for me. Here is an interesting permanent magnet motor working in attraction mode.
What do you think? This is the most basic layout I guess. Also see the attached video.

Workable?

Thanks!
Steven

I think that it will not work, because the magnets inside the shield will be attracted to it. There are many more magnets attracted to the shield, than the ones that are attracted for the motion. So the force stopping must be great.

Regards,

Kostas

[Nali2001]

The magnets keep the same distance in regard to the retainer plate all the time so except for losses like eddy currents there will be no resistance coused by the retainer plate.

[dutchy1966]

Hi,

This can be perfectly modelled in FEMM. You will be able to see the forces involved and the torque on the rotors.....
But my opinion is that the most attracted magnets will not go behind the retaining plates..... but might be worth a try....

Robert

[hartiberlin]

Hi Steven,
very nice animation and idea.

I think that this concept can have some success,
if you make the metall from ferrite or other nonconducting
core, so you don?t have any eddy current losses and
2. you need to "tune" the point, where the magnets are closest
together.
There you probably need a bigger plate diameter, so the flux
is going more into the plate and can not halt the rotation of the discs.

Also the discs need to be geared up, so they can only move
together in sync.

Isn?t there any magnetic forces "plugin" for 3D Studio,
so you could test inside the animation, if this works ?

Many thanks.

Regards, Stefan.