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ptc-42668551-Visitor
1-Visitor
February 15, 2013
Question

finite difference method for magnetic field

  • February 15, 2013
  • 1 reply
  • 1602 views

Hi,

I try to define magnetic field for simple one phase transformer. I used the cylindrical Poisson equation for finite difference method.

I got good result when magnetic potential is equal zero on boundaries. But when I try to get normal flux density on boundaries I couldn’t get solution.

MathCAD 15 file with is attached.

Appreciate any help

Andrii

1 reply

W
Werner_E25-Diamond I
25-Diamond I
February 15, 2013

Your sheet loads and displays without errors. I also see no solve block which could fail to return a solution.

I'm just looking over your sheet from an abstract point of view untouched from any technical insight so its quite possible I'm missing the point..

Maybe you could elaborate on what failed.

P
ptc-42668551-VisitorAuthor
1-Visitor
February 15, 2013

Yes, there no errors. But if you change number of iterations, you will get another solution. There is some theoretical problem with the boundary condition. I couldn’t get convergence by this method. If it was 2D problem (no cylindrical, without radius) I would get convergence.

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