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Questions tagged [skin-effect]

Anything related to skin effect, i.e. the physical phenomenon where the effective resistance that a conductor presents to an alternating current flowing through it increases with its frequency.

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27 views

4 Conductor System Impedance

I have a +25kV 0v -25kV conductor system, involving 4 conductors located within a 30m^2 cross sectional plane, for which I need to calculate the individual conductor impedance's per meter and need ...
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95 views

Iron wire as DC Power Filter

Since Iron has a skin depth of 220 micrometres at 60 Hz, and much lower at higher frequencies, how well would it perform as a DC power filter? Would there be any electrical downsides to using it as ...
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138 views

Parasitic Inductance

when we say that in a wire there is a parasitic inductance, what is its cause? Is it the skin effect of the wire, the magnetic flux (generated by the current) through the surface of the total circuit ...
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Why isn't there a non-conducting core wire for high-frequency coil applications

Background The commonly known skin effect formulas are derived and only apply to solid conductors. The commonly used "skin depth" only applies in these cases. It is for this reason that in some ...
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40 views

Skin depth reference data for common materials

Is there any well-regarded publication that gives values for skin depths of common metals (Al alloys, brasses, other engineering alloys) in the Hz-to-MHz frequency range? I am not an electrical ...
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70 views

Skin effect with superimposed frequencies

Does a high-frequency signal affect the skin depth of another low-frequency signal? E.g.: On a solid 6mm2 copper conductor, there are three currents running through it at the same time: 15 A DC 15 A ...
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116 views

Can I determine the rough frequency of an ac current by measuring the frequency of the electromagnetic radiation predominantly emitting from it?

Can I determine the rough frequency of an ac current by measuring the frequency of the electromagnetic radiation predominantly emitting from it? - if so, are there any other variable I need to ...
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189 views

square wave skin depth

It is known that formula for skin depth is only applicable if waveform of the voltage is sinusoidal. So, i have an smps which works at 83khz frequency (square wave). What is skin depth for such ...
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42 views

Skin effect and mag field distribution inside an electric conductor

Magnetic field inside a current carrying conductor Suppose I took a circular current strip in a current carrying wire. At the centre I have marked the directions of magnetic field due to four points 1,...
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222 views

When high frequency current goes through a superconductor, does it still radiate off like it would with copper?

I've been thinking about the skin effect and that got me thinking: When high frequency current goes through a superconductor, does it still radiate off like it would with copper?
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65 views

About current distributions and skin effect [closed]

I'm reading a book about signal integrity. And I have a question. Within each conductor, the current wants to spread apart to decrease its partial self-inductance. -> I don't understand the reason ...
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67 views

Litz versus aluminium tube

For a multi-kW inductive power transmission application, rather than Litz cabvling I should like to consider Aluminium tubing, to take advantage of the structural possibilities. What would be the ...
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325 views

If charges flow along the surface of a conductor, why is resistance a function of cross-sectional area?

The skin effect dictates that charges tend to flow along the surface of a conductor. And yet resistance of a material is equal to resistivity multiplied by the cross-sectional area of the material ...
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1k views

Does stranded wire reduce resistance from skin effect when strands are not insulated?

I've seen many discussions where people mention multi-strand wire improving conductivity when skin effect is a concern, but I often see Litz wire mentioned in these discussions. Litz wire contains ...
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377 views

AC resistance of thin PCB trace

I want to calculate the AC resistance of a thin pcb trace. The complication here is, that the trace is already close to the skin-depth, so the standard formulas that I found on the net don't apply. ...
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344 views

Skin effect - resistance changes during DC/AC variation

I have a question about skin effect, skin depth to be exact. Consider an AC system and a wire in it. Skin depth is, let it be, 0.2 radius of it. We know that if it was a DC system, it would spread ...
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Cause of skin effect: eddy current inside conductor

We all know very well that due to eddy current (back EMF) generation within an AC carrying conductor, "skin effect" occurs. Eddy current density: Highest at center of conductor core Lowest at ...
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Question about Skin depth

It says that the energy of the EM wave decays rapidly if it travels through a good conductive material. Therefore, much of the wave is travelling on the surface of the copper wire. (since it decays ...
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Does skin effect appear in home wires?

A technician said: Its better to use a solid cables for homes (not stranded cables). I did not use any calculations but I think that stranded cables are better due to skin effect. We use 220V / 50Hz. ...
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Why skin effect happens at the center of a conductor?

I was reading an article about Skin Effect. I know what skin effect is, but I wanted to know what causes it. Why is the back EMF strongest at the center? Why is it not distributed uniformly at the ...
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Intuitive explanation of Skin Effect?

I'm trying to wrap my head round Skin Depth, we've derived the wave equation from Maxwell's equations, using the conditions that it's a "good conductor" ρ = 0, σ >> ωε and ...
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941 views

Is skin effect applicable to pulsed DC systems?

Unlike AC, the direction of DC never changes. If the current varies with time, should there be enough variation in the magnetic field to cause redistribution of the current?
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937 views

Is the skin effect a factor for low-current AC applications?

Another way to phrase the question might be, "Is the skin effect proportional to current flow?" I am only vaguely familiar with the skin effect, so I read up on the subject to learn more about it, ...
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579 views

Does solid/multi-stranded/Litz wire make a difference in binary serial output?

I'm using two shift registers to control 16 digital outputs using only 3 pins on my microcontroller. The parallel outputs carry <= 20 mA DC, their sole purpose is to power LEDs. My microcontroller ...
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376 views

Variation of resistance within conductor due to Skin effect

What is Skin effect? I learnt that it is a property exhibited by all conducting materials to restrict the flow of current ( eventually ac ) at higher frequencies to their boundary. My question is ...
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85 views

Impedance of 4 conductor system spaced horizontally apart

I have 4 cylindrical conductors spaced equally and horizontally apart. How can I calculate the magnitude of Impedance (Z) using the Skin effect and Proximity effect? I'm looking for an equation that ...
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3answers
6k views

How do electrical body fat detector work?

I would like to build me own electrical body fact calculator from a microcontroller (the Arduino), but I would like to know how does it work. I have a 5V analog reader, So I guess I sould calculate ...
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2answers
4k views

For a nerve-teste circuit, what causes the shock at low voltage?

As a bit of a weird test for my new 555 IC, I have been thinking of stepping down a 9V PP3 battery to five or so volts and creating a square wave @ ~100Hz and shocking my finger. I understand that a ...
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582 views

Hardware to Detect EMG or Skin Resistance

I have been given assignment to design a device that can detect emg signal of Skin Resistance change while moving fingers. actually i need to track finger movements using some hardware containing ...
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2k views

Skin effect for pulse current

I've just bought some 6mm^2 copper wire for my project where I will have large pulse currents - ~500A peak (driving very large Xenon flash bulbs, 1000J pulse in 2ms). But I know that skin effect ...