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4hv.org :: Forums :: General Science and Electronics
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Skin and Proximity Effect.

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Patrick
Wed Mar 06 2019, 04:25AM Print
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Im having trouble understanding skin and proximity effect.

Ive made this pic for the skin effect question:
Link2
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Patrick
Wed Mar 06 2019, 05:01AM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
im havin trouble posting? does this show up ?

Link2
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Paul Benham
Wed Mar 06 2019, 07:37PM
Paul Benham Registered Member #570 Joined: Wed Mar 07 2007, 03:41PM
Location: Winchester Uk
Posts: 42
Yes the pictures showed when I clicked on the link.

Skin depth varies depending on frequency and how conductive the material is.

Proximity effects are something else, not sure they are related. Usually in RF circuits you would not place anything within a distance equal to the coil diameter to minimise reduction in the Q of the coil, I.e. An increase in its losses.

I hope this helps,

Regards

Paul
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2Spoons
Wed Mar 06 2019, 09:02PM
2Spoons Registered Member #2939 Joined: Fri Jun 25 2010, 04:25AM
Location:
Posts: 615
Actually they are related, in that skin effect is the result of eddy currents generated by a conductor's own AC magnetic field, while proximity effect is the result of eddy currents generated by the AC magnetic field of adjacent conductors.
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Paul Benham
Thu Mar 07 2019, 06:29PM
Paul Benham Registered Member #570 Joined: Wed Mar 07 2007, 03:41PM
Location: Winchester Uk
Posts: 42
That was a good explanation, thanks for that.

Paul.
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2Spoons
Fri Mar 08 2019, 02:42AM
2Spoons Registered Member #2939 Joined: Fri Jun 25 2010, 04:25AM
Location:
Posts: 615
Just summarising two whole pages of wikipedia in one sentence wink
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Patrick
Fri Mar 08 2019, 05:07AM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
yes the great wiki is where i usually start.
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