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Size: 1729
Comment:
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Size: 1886
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 13: | Line 13: |
| || '''Resistivity'''<<BR>><<BR>> for copper see <<BR>> Matula 1979<<BR>>page 1161<<BR>><<BR>><<BR>>for aluminum see<<BR>> Simmons 1960 || | || '''Resistivity'''<<BR>><<BR>> for copper see <<BR>>[[https://aip.scitation.org/doi/abs/10.1063/1.555614 | Matula 1979 ]]<<BR>>page 1161<<BR>><<BR>><<BR>>for aluminum see<<BR>> [[ https://journals.aps.org/pr/abstract/10.1103/PhysRev.117.62 | Simmons 1960 ]] || |
| Line 15: | Line 15: |
| || !LibreOffice <<BR>>[[ attachment:skindepth.ods | Spreadsheet]] || | || [[https://www.libreoffice.org | LibreOffice ]]<<BR>>[[ attachment:skindepth.ods | Spreadsheet]] || |
Skin Depth
Material |
Temp |
perm. |
resis. |
depth (mm) at frequency (Hz) |
||||||
|
K |
\mu_r |
\rho~~\Omega-m |
1 Hz |
60 Hz |
400 Hz |
1 KHz |
5 KHz |
20 KHz |
200 KHz |
3% Si Transformer Steel |
300 |
700 |
5e-7 |
13 |
1.7 |
0.67 |
0.43 |
0.19 |
0.95 |
0.030 |
3% Si Transformer Steel |
600 |
300? |
7e-7? |
24 |
3.1 |
1.2 |
0.77 |
0.34 |
0.17 |
0.054 |
Copper |
300 |
1 |
1.7e-8 |
66 |
8.5 |
3.3 |
2.1 |
0.93 |
0.46 |
0.15 |
Copper |
600 |
1 |
3.8e-8 |
98 |
13 |
4.9 |
3.1 |
1.4 |
0.69 |
0.22 |
Aluminum |
300 |
1 |
2.8e-8 |
84 |
11 |
4.2 |
2.7 |
1.2 |
0.60 |
0.19 |
Aluminum |
600 |
1 |
5.9e-8 |
122 |
16 |
6.1 |
3.9 |
1.7 |
0.86 |
0.27 |
|
|
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\delta = \sqrt{ 2 \rho / \omega \mu_r \mu_0 } |
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Resistivity |
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Graph by Zureks |
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