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Electromagnet (Electromagnetic needle)

Posted 9 set 2014, 17:01 GMT-4 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 22 ott 2014, 08:43 GMT-4
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Hello Daniel Murphy

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turboboost
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Posted: 10 years ago 22 ott 2014, 08:31 GMT-4
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: 10 years ago 22 ott 2014, 08:43 GMT-4
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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