Understand Coupling Coefficient k Between Two Wire Coils

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SUMMARY

The discussion focuses on the coupling coefficient k between two wire coils positioned at a distance d apart. It is established that the coupling coefficient decreases as the separation distance increases, which aligns with electromagnetic theory. The specific geometry of the coils significantly influences the rate at which the coupling coefficient diminishes, necessitating the use of integrals for precise calculations. Additionally, the graph representing this relationship should correctly label the axes as K and d, rather than Ki and di.

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dnyberg2
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Can someone please look at this and tell me what's going on here?
I'm trying to understand the coupling coefficient k between two wire coils some d distance apart.
I found this but I am lost!

Please help!
 

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Where did you find it? What is it you don't understand?
It looks like the coupling coefficient gets smaller with increased separation - which is expected.
The exact way that the coupling falls off depends on the exact geometry of the coils ... that will be what the integral is for. The graph axis should just be labelled K and d, not Ki and di.
 

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