inductance of transformer windings

From: Jamie Morken <jmorken@xxxxxxx>
Date: Tue, 16 Oct 2007 04:54:27 GMT

Hi,

I have a transformer primary of 17 turns and 4mH inductance.

There are 4 coils in series (3 taps / 5 leads)

I am trying to figure out the inductance of the 4 coils.

coil1 3turns 706uH

coil2 2turns 471uH

coil3 4turns 941uH

coil4 8turns 1.88mH

that adds up to 4mH but I read before that when you
double the turns the inductance quadruples, so I am
not sure if the above calculations are correct.

cheers,
Jamie

.

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