Search found 32 matches

by Bavragor
25 Apr 2016, 17:42
Forum: ElmerSolver
Topic: Magnetodynamics Solver, wrong magnetic field strength?
Replies: 2
Views: 1851

Magnetodynamics Solver, wrong magnetic field strength?

Hi community, I have a problem with an electromagnetic model. The model describes a single wire surrounded by air and and an iron cylinder (picture). The solution of the magnetic field strength is lower at increasing distance to the wire than it should be (f.e. r=50mm -> H=1450A/m instead of 2500A/m...
by Bavragor
21 Mar 2016, 12:17
Forum: ElmerGUI
Topic: Coil with core, wrong magnetic field strength?
Replies: 3
Views: 3725

Re: Coil with core, wrong magnetic field strength?

To get a better overview of the problem:
coil.png
Overview of the model
(99.56 KiB) Not downloaded yet
fieldstrength.png
magnetic field strength in a cut through the middle of the coil
(106.02 KiB) Not downloaded yet

I changed the Steady State Max Iterations, the solver and the preconditioner, but the result doesn't change. Any other ideas what I do wrong? Or is my assumption that H should be nearly the same as in the model without a core?
by Bavragor
20 Mar 2016, 13:12
Forum: ElmerGUI
Topic: Coil with core, wrong magnetic field strength?
Replies: 3
Views: 3725

Re: Coil with core, wrong magnetic field strength?

Yes, I tried it but it does not change anything.
by Bavragor
18 Mar 2016, 15:15
Forum: ElmerGUI
Topic: Coil with core, wrong magnetic field strength?
Replies: 3
Views: 3725

Coil with core, wrong magnetic field strength?

Hi Forum, I hope this is the right forum. I tried to simulate a simple cylindric coil with a core sourrounded by a sphere(see Dropboxlink) with: sphere with a radius of 300mm, coil with a length of 60mm and a radius of 10mm core with a length of 100mm and a radius of 8mm profile of a winding pi*(1.5...
by Bavragor
07 Jan 2014, 17:39
Forum: ElmerGUI
Topic: B-H Curve MagnetoDynamics2D
Replies: 15
Views: 9040

Re: B-H Curve MagnetoDynamics2D

Hello again,

I just want to say, that i wasn't able to solve the problem with your help. But I'm hoping that someone will get it and write it in the documentation :)

Thx to all who tried to help me
by Bavragor
18 Nov 2013, 12:18
Forum: ElmerGUI
Topic: B-H Curve MagnetoDynamics2D
Replies: 15
Views: 9040

Re: B-H Curve MagnetoDynamics2D

You are right. I'm from germany. Thanx for the link.
But the problem is how to give the coefficients so that elmer understand it.

btw: Thanx a lot for the help.
by Bavragor
15 Nov 2013, 17:57
Forum: ElmerGUI
Topic: B-H Curve MagnetoDynamics2D
Replies: 15
Views: 9040

Re: B-H Curve MagnetoDynamics2D

That is the problem i have. In which way i can told elmer that this is a cubic spline? Which form should it have?

FEMM is compared to Elmer very easy. But for my bachelor thesis i have to use elmer.
by Bavragor
15 Nov 2013, 14:42
Forum: ElmerGUI
Topic: B-H Curve MagnetoDynamics2D
Replies: 15
Views: 9040

Re: B-H Curve MagnetoDynamics2D

Hi,

Yes, this test works.
Maybe i should try to use MagnetoDynamics as in the example and not the MagnetoDynamics2d solver?
by Bavragor
15 Nov 2013, 14:31
Forum: ElmerGUI
Topic: B-H Curve MagnetoDynamics2D
Replies: 15
Views: 9040

Re: B-H Curve MagnetoDynamics2D

Hi, Thanks for the input. i use the latest svn-version. Maybe i will try it again on Linux. I know that my case-file worked with relative permeability = const. But with an nonlinear curve i have no idea how to do that. In the models manuel it is written that the input of an nonlinear curve should wo...
by Bavragor
14 Nov 2013, 12:59
Forum: ElmerGUI
Topic: B-H Curve MagnetoDynamics2D
Replies: 15
Views: 9040

Re: B-H Curve MagnetoDynamics2D

Hi again, I try to include the B-H-Curve like in the example, but got errors: Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: #0 6f61143e #1 6f68ec2f #2 00401261 Anyone an idea what I'm doing wrong? I attached my sif-file, the geometry data a...