# Ansys Maxwell 2D Number of turns

1. ### tya1010

3
Hi,

How do you define number of turns in a coil designed to operate at 100 kHz? Maxwell 2D axisymmetric treats the coils as a single conductor, how can we define number of turns. I would appreciate any response.

Thanks

2. ### jsgruszynski

287
I don't know Maxwell but in Comsol you simply identify a toroidally shaped shell as being a "coil" and assign N turns plus a current direction (as a cross product orientation) as a property to it. IR losses are determined by the resistivity of the material assigned. The simulator "cheats" and simplifies the B calculation based on circular sheet currents in the structure and multiplies by N.

I'm guessing that Maxwell does something like this.

3. ### tya1010

3
Thanks for the reply. I actually figured out how to integrate the number of turns (integrate N on the matrix) and maxwell does exactly the same thing with comsol and call it post processing.

4. ### Pedro Almeida

7
Hi tya1010. I'm having the same problem you had (with the difference that I'm using Maxwell3D in magnetostatic mode).
I'm still learning to use this software. Could you elaborate on "integrating the number of turns"? or point me to where you found that information?
Any help with be highly appreciated.

5. ### tya1010

3
Hi,

To get the correct magnetic flux you need to simply multiply the current with the number of turns and enter I*N when you are assigning excitation. Apart from that for the correct results (for example L) go to parameters and there is two tabs one set up and the other one is postprocessing after you check the box include under set up then under postprocessing tab you can define the number of turns. These are all done on Maxwell 2D so I am not sure if it would work on 3D though.

6. ### Pedro Almeida

7
Makes sense. As far as I can see, It's the same in Maxwell 3D.
Thank you very much!