Capacitance in Inductors

[nilrehob]

I've been trying to wrap my head around this for some time now;
how does the capacitance in inductors manifest itself?

If you pulse it, the capacitative part seems to go hand in hand with the inductive part, at least to begin with, but then what?
It gets especially troublesome when the pulse stops and the polarity of the inductor flips!

Anyone willing to explain this?

/Hob

[Armagdn03]

I've been trying to wrap my head around this for some time now;
how does the capacitance in inductors manifest itself?

If you pulse it, the capacitative part seems to go hand in hand with the inductive part, at least to begin with, but then what?
It gets especially troublesome when the pulse stops and the polarity of the inductor flips!

Anyone willing to explain this?

/Hob

capacitance in general, is the electric connection an object has to all other objects in the universe.

Within a coil, the mass of copper itself has a capacitance in relation to its environment.

Each winding is also in close proximity to other adjacent windings. These adjacent windings are very close and so give rise to a large part of the capacitance in this example.

If you imagine a solenoid, single layer, which as 100v placed across it and 50 windings.

The capacity between each winding will contain 2v each for a sum total of 100.

[nilrehob]

If you imagine a solenoid, single layer, which as 100v placed across it and 50 windings.

The capacity between each winding will contain 2v each for a sum total of 100.

Yes, but how will it play out in a pulsed circuit?

And another thing, if you have two layers and wind it up-down you will have 0 to 100V between the layers,
but if you do it up-up you will have constant 50V between the layers,
the capacitative energy ratio between the two coils would then be 4:3 with the up-down having more energy,
but regardless on how you wind them, how will this energy manifest itself?

/Hob

[nilrehob]

My guess is that the capacitance in inductors is parasitic when being pulsed,
so this would suggest winding coils for pulsing like up-up,
skipping back for each layer.

Anyone willing to comment on this?

/Hob

BTW: the ratio 4:3 came from integrating u^2 du and (v/2)^2 du, both over 0 to v,
and then divide the first with the second.