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Calculation of multi-turn Coil Indutance

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Hi,

I have simulated a multi-turn coil (Coil type: Numeric). The coil excitation was set as Current 1A. I used Global Evaluation to get the value of the inductance of the coil. The evaluation expression was mf.intWm*2 (because the 0.5LI^2=W and the I was 1A ). I found that the value that I get was only half of mf.LCoil_1.

I don't know why. Thank you for helping me.

4 Replies Last Post Sep 6, 2016, 9:39 a.m. EDT
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Hello Tony Adams

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Posted: 8 years ago Sep 6, 2016, 6:47 a.m. EDT
I'm not entirely sure, just a guestamate.

Was your solution stationary or frequency domain? If in the frequency domain, suppose that the excitation current was 1A peak, hence the rms current is sqrt(2)*1A => i^2 = 0.5*1A, this could explains the 1/2 factor difference.
I'm not entirely sure, just a guestamate. Was your solution stationary or frequency domain? If in the frequency domain, suppose that the excitation current was 1A peak, hence the rms current is sqrt(2)*1A => i^2 = 0.5*1A, this could explains the 1/2 factor difference.

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Posted: 8 years ago Sep 6, 2016, 8:32 a.m. EDT
Are you using symmetry in your model?
Are you using symmetry in your model?

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Posted: 8 years ago Sep 6, 2016, 9:37 a.m. EDT

I'm not entirely sure, just a guestamate.

Was your solution stationary or frequency domain? If in the frequency domain, suppose that the excitation current was 1A peak, hence the rms current is sqrt(2)*1A => i^2 = 0.5*1A, this could explains the 1/2 factor difference.


wow! It seems so reasonable! Thanks a lot!
[QUOTE] I'm not entirely sure, just a guestamate. Was your solution stationary or frequency domain? If in the frequency domain, suppose that the excitation current was 1A peak, hence the rms current is sqrt(2)*1A => i^2 = 0.5*1A, this could explains the 1/2 factor difference. [/QUOTE] wow! It seems so reasonable! Thanks a lot!

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Posted: 8 years ago Sep 6, 2016, 9:39 a.m. EDT

Are you using symmetry in your model?


No. I simulated in 3D model. Thanks for reply!
[QUOTE] Are you using symmetry in your model? [/QUOTE] No. I simulated in 3D model. Thanks for reply!

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