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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Electromagnet (Electromagnetic needle)

Posted 2014年9月9日 GMT-4 17:01 Low-Frequency Electromagnetics, RF & Microwave Engineering, Geometry, Materials, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.4 2 Replies

Daniel Murphy
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I am trying to model an "electromagnetic needle" that is relatively simple, but I want to be able to adjust parameters and optimize geometry, There will be somewhere in the range of 1,000 turns of copper wire around a Permalloy core with a sharp tip extending out of one end of the coil.

I am wondering if anyone has recommendations about setting up the coil. I tried creating a helix with a 1000 turns, but then realized that there is a multiple turn coil option in the magnetic fields physics.

Any advice or pointers towards videos or other helpful resources would be of great help. This is my first time using COMSOL, so I am having a lot of difficulty. See attached file for my progress so far
2 Replies Last Post 2014年10月22日 GMT-4 08:43
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Hello Daniel Murphy

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turboboost
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Posted: 1 decade ago 2014年10月22日 GMT-4 08:31
I'm just trying to create an electromagnet and i started trying to use a helix, but the meshing was impossible. I went with a multi-turn coil domain like in the e-core example.

My numbers still aren't realistic because I have issues with high frequency excitation.
I'm just trying to create an electromagnet and i started trying to use a helix, but the meshing was impossible. I went with a multi-turn coil domain like in the e-core example. My numbers still aren't realistic because I have issues with high frequency excitation.
turboboost
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Posted: 1 decade ago 2014年10月22日 GMT-4 08:43
I'm just trying to create an electromagnet and i started trying to use a helix, but the meshing was impossible. I went with a multi-turn coil domain like in the e-core example.

My numbers still aren't realistic because I have issues with high frequency excitation.
I'm just trying to create an electromagnet and i started trying to use a helix, but the meshing was impossible. I went with a multi-turn coil domain like in the e-core example. My numbers still aren't realistic because I have issues with high frequency excitation.

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