Discussion Forum

Good morning,

I'm a bit in hurry right now, so I have to make it quick:

I'm facing some issues in modelling electric machines.
Using:
Physic: rotating machines; 2D ;Time dependent.

I built a Generator model with 2 poles. Sending a DC Current via Single- Coil boundary into the rotor and the negative value back again with more Single-Coil boundaries.
Then I let the rotor rotate with a defined speed around the z-axis. Time dependent rotor rotating works great, but the Single-Coil boundaries don't rotate... They just stay where they are and so does the DC current density.

IF I choose a permanent magnet instead of a DC Current for the rotor, the magnetic vector potential at least rotates and induces current density into the stator flutes. Though I think that I'm still doing something wrong because I get induced almost the same current density in the rotor flutes...
I was hoping for the current density in the rotor flutes to be zero, since it rotates with the same speed as the magnetic vector potential.

Sadly I didn't find much information about the rotating machines module. A little bit in the COMSOL documentation and in 1 thread of this forum.

I attached a .gif where you can see that the magnetic vector potential rotates and induces a current density into the rotor and the stator, although it's defined as a remanence magnetic flux density via "Ampere's law" for the rotor, which is being rotated...

I hope someone can help me with my problems...
Thanks in advance