Learning Forum

[pepecarte22]

Hello everyone, I hope you are all doing well. I would like to ask for some assistance from the community.

This is probably a basic question, so I apologize beforehand. I need to plot the flux density as a function in time in a specific cross sectional area in a transformer (a part of the ferromagnetic core), I managed to add the polyline and see how mag B changes as a function of distance, but I'm not sure which is the best path to get B(t) is. I understand that flux distribuition is not homogenous in a given area, so distance is still very relevant. Is doing the average magnitude of B the right choice here, and what is the best way to do this and get a resulting plot? I'm aware that the FluxLinkage measurement of the windings exist, and that can they can be used to calculate B if the amount of turns and area is known, but I'm uncertain if this adequately captures the flux density in the core. Also, there is more than 1 winding around the core area (may be additive or subtractive in terms of flux), so I'm not sure what each FluxLinkage is actually representing, thats why I wanted a solution like the one using Polyline, unless there is very clear explanation regarding this measurement. In any case, if information on both methods could be given, I would appreciate it very much. That is because I also need to know B in sections of the transformer that doesn't contain windings, so something like the polyline would be needed (the core design is very different and complex).

Thank you very much for your time and any assistance you can provide. If I'm not asking too much, can you give a step by step procedure to achieve this, please.

[MH]

Hi, you need to make a surface where you want B(t), if you want a meaningful average.

Then use Fields Calculator to get the normal component of B

Select B->Extract the component normal to the surface (ScalarX / ScalarY / ScalarZ depending on orientation)

Compute area‑average B->With that component on the stack, select the surface->Apply Surface Integral->Divide by the Area of the same surface->Save as a named quantity (e.g., Bavg_location)

Plot vs time using field plots->Results → Create Report → Transient → XY Plot

X = Time

Y = Bavg_leg

That gives you B(t) for that exact cross‑section.

 

For the question about FluxLinkage:

FluxLinkage = total linked flux of a winding

[pepecarte22]

Thank you very much for your response, MH! It will help a lot. Just one question, my design is 2D, is polyline not acceptable in this case?