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Animated Magnetic Field of 3-Phase Cable
Posted Mar 22, 2017, 12:47 p.m. EDT Low-Frequency Electromagnetics 2 Replies
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Hello,
I tried using the model "www.comsol.de/model/electromagnetic-forces-on-parallel-current-carrying-wires-131" to create a 3-phase cable carrying current with a 120° phase shift. I use the time domain and first I tried to set three different current parameters like " 6[A]*sin(2*pi*50[Hz]*t[s]+120[deg]) " and now I tried to use directly the term " 6[A]*sin(2*pi*50[Hz]*t[s]+120[deg])/(pi*r^2) " as external current density. But unfortunatley the resuting magentic field does not behave as expected. The attached .gif shows the magentic field, which is not correctly in phase. I also attached the .mph-file.
I want to use the time domain, because I want to animate the magnetic field. But I was wondering what the frequency domain can show me after calculation because when I shuld get an alternating field it showed e stationary field around each of the three wires.
Can someone help me?
I tried using the model "www.comsol.de/model/electromagnetic-forces-on-parallel-current-carrying-wires-131" to create a 3-phase cable carrying current with a 120° phase shift. I use the time domain and first I tried to set three different current parameters like " 6[A]*sin(2*pi*50[Hz]*t[s]+120[deg]) " and now I tried to use directly the term " 6[A]*sin(2*pi*50[Hz]*t[s]+120[deg])/(pi*r^2) " as external current density. But unfortunatley the resuting magentic field does not behave as expected. The attached .gif shows the magentic field, which is not correctly in phase. I also attached the .mph-file.
I want to use the time domain, because I want to animate the magnetic field. But I was wondering what the frequency domain can show me after calculation because when I shuld get an alternating field it showed e stationary field around each of the three wires.
Can someone help me?
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2 Replies Last Post Mar 23, 2017, 1:52 p.m. EDT
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Posted:
7 years ago
A frequency domain solution yields the sinusoidal steady state solution: that is, it yields the (complex) phasor value of every quantity solved for. This is all you need to produce an animation of the magnetic field.
You need to use the "dynamic data extension" option.
DW Greve
DWGreve Consulting
You need to use the "dynamic data extension" option.
DW Greve
DWGreve Consulting
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Posted:
7 years ago
Okay thanks. It helped a lot. Now I'm using frequency domain and I want to plot a graph distance(of a probe to the wires) vs. Magnetic flux density, y-component. I did it with a Cut Line 2D and a 1D-Plot-Group and a Linegraph. Now I have a nice graph but are the values the maxima(peak values) of the wave?