The Vidar-magnet motor MK2

[hartiberlin]

Okay, here is attached to this message the first torque measurement.
YOu must just draw an additional circle around the object inside a smaller
triangled airgap and close the circle with the red circle
drawing tool in the output Blux density diagram and then click the
the Line integral symbol and click Torque from Stress tensor.

This gives about 1.2 NewtonMeter torque at the zero degrees rotation setting.

I will now see, what it is for each single rotor.

Regards, Stefan.

[bitRAKE]

Forgive my ignorance, but would the motor just stop about the position in the below image?

[Low-Q]

Okay, here is attached to this message the first torque measurement.
YOu must just draw an additional circle around the object inside a smaller
triangled airgap and close the circle with the red circle
drawing tool in the output Blux density diagram and then click the
the Line integral symbol and click Torque from Stress tensor.

This gives about 1.2 NewtonMeter torque at the zero degrees rotation setting.

I will now see, what it is for each single rotor.

Regards, Stefan.

Thanks for your help!

I look forward to se the final result, even if it is negative

BTW: You must probably exclude the fixed center magnet in your measurements to get a correct torque value (?)

Br.

Vidar

[Low-Q]

I finally made it, Stefan. I excluded the inner permanent magnet, and got -5,5Nm torque instead of -1,2Nm.

I also closed the iron ring and got -0,04Nm torque...I believe this is average torque in one revolution.

I'll try anoter angles on the inner permanent magnet to se if it alters the torque.

Br.

Vidar

[hartiberlin]

Hi Vidar,
yes, the inner circle magnet must be excluded.
I saw, that it gives greatly different results, if you include it !
I must redraw all your drawings first to make
more space for another line integral line around the moving
rotors and also make the airgap triangles mesh more dense at this
point as this lowers the errors.

Also it helps in faster computing to define the pure iron material
as Linear and not Nonlinear, which accelerates the computation a lot
if you have a finer mesh.
The introduced error is not so big with this easier calculations.

Sorry, I am pretty busy with other things right now and I will
try to get to it during this week.
Stay tuned.

You have to make a graph of all the torque values versus rotor
angles and see, if the positive values over a 360 degree cycles are
more than then negative torque values over this cycle.
If it does not add up to ZERO, then we have a positive result
and the motor will selfrun, if the simulation is not wrong.

If I only had time to learn this LUA Script language, all would be much easier..

Regards, Stefan.