Hi all,
I would simulate the magnetic field in a log coil. In the attached image you could find the good results between the 2D free software FEMM and the analytical result.
Unfortunatelly, for the Elmer I found an internal magnetic flux density about 10 time higher.
In the attache the sif input file.
Need help in magnetostatic analysis
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Need help in magnetostatic analysis
- Attachments
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- coilClaudio.sif
- (3.84 KiB) Downloaded 440 times
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- coil.jpg (266.77 KiB) Viewed 6179 times
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- Posts: 41
- Joined: 25 Feb 2011, 18:43
- Antispam: Yes
- Location: Italy
Re: Need help in magnetostatic analysis
just a clarification:
the value in the image: 355.2428 [MA/m^3], is the value used in the sif file as body force for the coil:
... omissis ...
$ iC = 353.4457E+06 ! [A/m^3]
... omissis ...
Body Force 1
Current Density 1 = Variable coordinate
Real MATC "-iC*tx(1)/sqrt(tx(0)*tx(0)+tx(1)*tx(1))"
Current Density 2 = Variable coordinate
Real MATC "iC*tx(0)/sqrt(tx(0)*tx(0)+tx(1)*tx(1))"
Current Density 3 = 0
End
the value in the image: 355.2428 [MA/m^3], is the value used in the sif file as body force for the coil:
... omissis ...
$ iC = 353.4457E+06 ! [A/m^3]
... omissis ...
Body Force 1
Current Density 1 = Variable coordinate
Real MATC "-iC*tx(1)/sqrt(tx(0)*tx(0)+tx(1)*tx(1))"
Current Density 2 = Variable coordinate
Real MATC "iC*tx(0)/sqrt(tx(0)*tx(0)+tx(1)*tx(1))"
Current Density 3 = 0
End
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- Posts: 41
- Joined: 25 Feb 2011, 18:43
- Antispam: Yes
- Location: Italy
Re: Need help in magnetostatic analysis
ok. I foud the mistake.
The coil current have to be done in A/m^2:
$ iC = 33.867E+06 ! [A/m^2]
Sorry...
The coil current have to be done in A/m^2:
$ iC = 33.867E+06 ! [A/m^2]
Sorry...
- Attachments
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- coilCorrect.jpg (268.24 KiB) Viewed 6174 times
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- coilClaudio.jpg (268.79 KiB) Viewed 6174 times