Gear-magnet motor. Just a strange idea

[Low-Q]

Hold on folks I am simulating OU in FEMM...

An example from one of the simulations:

Took a very thorough test last night. It looks like the torque of the eccentric rotor is about 9 percent higher than the outer rotor at any given position. This conflict is clearly against what I have learned about the exchange if we are to preserve energy transfer 1 to 1. In a model with outer diameter of 5cm rotor, giving an average 1.41Nm, while the eccentric and smaller rotor giving on average 1.54Nm. This is at first 9% difference - the wrong way! That should be the reverse. So I counted out the force of the two rotors physical radius. They are on the outer- and eccentric rotor, respectively 56.4 N and 77N. There is a difference of 20.6 N, which is then left over to overcome the back torque from the outer rotor! I do not understand this!

Believe me, I have simulated this many times now, with different sizes, magnetic strength etc. No matter what, I get OU!

I think it is time to build this. Make a simple prototype should be easy

Vidar

[FatChance!!!]

I wish you the best of luck even though I sincerely believe you will find out
that you missed some important data in the simulation and there will be no OU.

But...if you do have success, please update us as fast and thoroughly as possible.
We would all like to replicate a real working device for once!!!

[Airstriker]

This looks pretty well. However, at this moment I have no idea how you want to make the magnetisation of the outer wheel static - not moving with the wheel and also not affecting the magnetisation of the internal wheel. The internal wheel can be made of a long enough magnet so that the external wheel sees only one pole ('S') - probably a special shaped magnet is needed here and also note the weight of the magnet will be quite big. But what to do with the external wheel I don't know. Any ideas ? Maybe a ring magnet magnetized through the diameter ? A big one ;] But then eddy currents come into play - laminated (maybe special material) outer wheel needed.
All in all, I see this project quite expensive ;/
A 3D simulation would be quite helpfull here. But I'm affreaid we don't have any skilled person here on forum who can handle this ?

[broli]

I did a dummy simulation in wm2d. I used electrostatic charges instead. But you can actually view these as cylindrical magnets as well. I think this would be even easier to build than your highly geometric concept low-q  .

Like your animation this simulation uses gears. The ratio has to be exactly 1.25 anything else and it will just oscillate back and forth.

Here's a video of the build and below is the simulation file and some a picture of the rotational speed and acceleration graph.

http://www.youtube.com/watch?v=iDRvUNBPyng

This is really exciting because magnetic simulations show that all of this should be possible without any loss. More on these later.

Edit: Just when I was making this post and exporting video, wm2d crashed and I lost it. So I need to rebuild it. Meanwhile I attached a sneak peak of the setup I wanted to show. I'll reedit this post when everything is set back up and uploaded.

Edit2: Oke got it all back now and changed the post to reflect initial will.

[Low-Q]

Below there is a method of magnetizing the rotating outer rotor without rotating the magnetic field. The eccentric rotor is just magnets pointing outwards. Look close to it - maybe you guys see something I don't. Also a FEMM file are attached. In the simulation I move the whole motor up and down one step in order to measure torque around point 0, 0 for both rotors (The eccentric rotor are 1cm lower than the center of the outer rotor).

Vidar