[PPRAANet] Eddy current article question, copy attached

[GEORGE W SHAIFFER]

Looks like the server will not allow attachments only multiple copies of source link

George KE0QCC
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From: ppraanet-bounces at mailman.qth.net <ppraanet-bounces at mailman.qth.net> on behalf of GEORGE W SHAIFFER <gshaiffer at msn.com>
Sent: Monday, April 29, 2024 6:17 PM
To: ppraanet at mailman.qth.net <ppraanet at mailman.qth.net>
Subject: [PPRAANet] Eddy current article question, copy attached

[https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fres-h3.public.cdn.office.net%2Fassets%2Fmail%2Ffile-icon%2Fpng%2Fdocx_16x16.png&data=05%7C02%7C%7C9a33d9d64b284307c3a608dc68ab0f77%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638500331160410868%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=79fEFWCC7NChndw3RxiiWxrNbS5eV8jFETEzsJIjql4%3D&reserved=0<https://res-h3.public.cdn.office.net/assets/mail/file-icon/png/docx_16x16.png>]Eddy Current - Skin, and Proximity Effects.docx<https://na01.safelinks.protection.outlook.com/ap/w-59584e83/?url=https%3A%2F%2F1drv.ms%2Fw%2Fs!AhxdswHfx62xmHNEy8FfYIQe4cXq&data=05%7C02%7C%7C9a33d9d64b284307c3a608dc68ab0f77%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638500331160423521%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=MNAe7La0TlN3ML2gNTCqUlgA1gTZqzPayI4qf76HTxg%3D&reserved=0<https://1drv.ms/w/s!AhxdswHfx62xmHNEy8FfYIQe4cXq>>

In the article attached above the author(s) use the term AC resistance along with the term DC resistance.
I had always considered AC resistance as an impedance at zero-degree phase angle.  Is this the AC resistance
being discussed in this article?  Not sure if it really matters but I am curious.  One of the best explanations of eddy
current I have seen, most text mention it but that is about all.  I will need a mat program or ,calculator program to assist
me with math.  The drawing of transformer secondary being wound over a complete primary vs putting on
interleaved layers on primary and secondary windings is interesting. I knew it was sometimes done, but not sure why other
than to increase the magnetic coupling between the windings.

  George KE0QCC
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