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Power Tip 26: Current distribution in high-frequency conductors

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dt_hayden
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dt_hayden   12/29/2015 10:17:53 AM
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That is what I would say also, a cross section of the flat conductor is equipotential.  The varying impedance across the cross section is what forces the skin effect of current flow.

David Ashton
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David Ashton   12/28/2015 6:18:57 PM
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I'd say that it's the resistance in the conductor area that varies rather than the voltage - I'd say the voltage would be uniform along the condutor..??

zapadug
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zapadug   12/28/2015 8:20:07 AM
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Lets take for example fig. 2 - The flat conductor with current floqing in the ends. Is there voltage between end and center of conductor ?

zapadug
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re: Power Tip 26: Current distribution in high-frequency conductors
zapadug   12/28/2015 8:18:21 AM
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Does anyone knows for sure is there any voltage/potencial difference between current area and no current area ?

Many thanks.

bikeron
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re: Power Tip 26: Current distribution in high-frequency conductors
bikeron   4/5/2013 4:56:38 PM
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Overall a nice article.. Proximity effects can be killer in transformer designs in that more heat is generated than simple calculations would indicate. Figure 4 shows this very well.

Doug.Leeper
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re: Power Tip 26: Current distribution in high-frequency conductors
Doug.Leeper   7/15/2011 3:52:50 PM
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Another point to consider is eddy current losses, where Litz wire can be a heavy hitter reducing losses.

docdivakar
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re: Power Tip 26: Current distribution in high-frequency conductors
docdivakar   6/23/2011 10:50:14 PM
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@David Ashton: it is a simple setup to generate these plots in a 2D Emag Field Solver. You can download the Student Version of Sonnet (Lite, Version 13) and generate the current distribution plots. Note that many of these solvers require you to manually mesh the (free) space around the conductors with elements and some may need infinite boundary definitions (depending on the solution technique used: finite elements, boundary integrals, etc.) Dr. MP Divakar

docdivakar
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re: Power Tip 26: Current distribution in high-frequency conductors
docdivakar   6/23/2011 10:43:24 PM
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There is an error in the units next to the formula, the depth unit should be "um" (micron). So for, 1 MHz, we should have a skin depth of 0.076mm or 76um... so for example, a 2-mil wide & deep trace conducting at 1-MHz, it will be all of the cross section conducting current. Good article none-the-less. Dr. MP Divakar

BicycleBill
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re: Power Tip 26: Current distribution in high-frequency conductors
BicycleBill   11/2/2010 2:40:32 PM
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Thanks, I believe you are correct, but I will check with the author

JanneG
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re: Power Tip 26: Current distribution in high-frequency conductors
JanneG   11/2/2010 1:02:21 PM
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The formula for skin depth at the top of the document seems to be wrong; the skin depth at 1 MHz for copper would be 7.6 centimeters, which clearly is erroneus. Kind regards //JanneG

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