Learning Forum

[christopher.irwin]

I'm using Maxwell 3D in AEDT 2022R1 to model two windings (yellow) on a core (dark blue) with a nonlinear B-H curve.  The magnetic circuit is completed by a linear magnetic box (lighter blue) as shown.  I'm using an external circuit to connect the windings in series, and to excite them with a sinusoidal voltage source (red curve).  There's enough current flowing (blue curve) that, when it's multiplied by the number of turns and divided by the length of the windings, I think the H field should be strong enough that the core should be starting to saturate.  However, the current (again, blue curve) looks perfectly sinusoidal.  

I'm therefore wondering if I have something set up incorrectly, such that the transient solver isn't taking nonlinear B-H into account.  I've attached some screen shots of excitations, etc.

Other notes:

1. When I solved this in the eddy solver, the matrix inductance and resistance were at least "in the ballpark" of what I expected.
2. I let the mesh get up to 400k tets, which I think should be plenty.
3. There's a small air gap between the core and the linear magnetic material.
4. Turning on "Magnetization Computation" didn't seem to make a difference.  
5. The "AF" solver makes the output current settle quickly as advertised, but otherwise seemed to have no effect.
6. It might be obvious, but this is my first time using Maxwell 3D  

Any ideas or advice would be appreciated.  Thanks!

 

[NKC]

Hi christopher.irwin,

Please provide the below information for a better understanding of the problem.

1) How did you check the saturation of the core? Can you plot the Bmag plot on the core and share it?

2) Why did you connect the two coils in series in the circuit?

Regards,

Navya

 

 

[christopher.irwin]

Hi Navya,

I had a good support call with Jingchen Liang.  I believe I'm all set.  I will mark this thread as closed / answered.  Thanks!

Chris