Differences between revisions 42 and 45 (spanning 3 versions)
 ⇤ ← Revision 42 as of 2018-07-18 17:47:25 → Size: 1939 Editor: KeithLofstrom Comment: ← Revision 45 as of 2018-07-18 17:51:38 → ⇥ Size: 2007 Editor: KeithLofstrom Comment: Deletions are marked like this. Additions are marked like this. Line 11: Line 11: || ||<-10|10> {{ https://upload.wikimedia.org/wikipedia/commons/f/f3/Skin_depth_by_Zureks.png }} ||||$\delta = \sqrt{ 2 \rho / \omega \mu_r \mu_0 }$<
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>$\delta = \sqrt{ 2.533e11 \rho / ~f ~\mu_r }$<
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>$2 / 2 \pi \mu_0$ = 253303 m/H || || [[https://www.libreoffice.org | LibreOffice ]]<
>[[ attachment:skindepth.ods | Spreadsheet]] ||<-10|10> {{ https://upload.wikimedia.org/wikipedia/commons/f/f3/Skin_depth_by_Zureks.png }} ||||${ \Large { \delta = \sqrt{ 2 \rho \over { \omega ~ \mu_r ~ \mu_0 } } } }$<
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>${ \Large { \delta = \sqrt{ 2.533e11 \rho \over { f ~\mu_r } } } }$<
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>${ \LARGE { { 2 \over { 2 \pi \mu_0 } } } }$ = 253303 m/H || Line 14: Line 14: ||<)>Graph by [[https://commons.wikimedia.org/wiki/User:Zureks | Zureks]]<
>from Wikipedia<
>article [[ https://en.wikipedia.org/wiki/Skin_effect | skin effect ]] |||| [[https://www.libreoffice.org | LibreOffice ]]<
>[[ attachment:skindepth.ods | Spreadsheet]] || ||<)>Graph by [[https://commons.wikimedia.org/wiki/User:Zureks | Zureks]]<
>from Wikipedia<
>article [[ https://en.wikipedia.org/wiki/Skin_effect | skin effect ]] |

# Skin Depth

 Material Absolute Temperature relative permeability resistivity skin 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 { \Large { \delta = \sqrt{ 2 \rho \over { \omega ~ \mu_r ~ \mu_0 } } } } in meters { \Large { \delta = \sqrt{ 2.533e11 \rho \over { f ~\mu_r } } } } in mm { \LARGE { { 2 \over { 2 \pi \mu_0 } } } } = 253303 m/H Resistivity for copper see Matula 1979 page 1161 for aluminum see Simmons 1960

||<)>Graph by Zureks
from Wikipedia
article skin effect |

SkinDepth (last edited 2018-07-18 17:58:39 by KeithLofstrom)