Induced current in center tapped symmetric differential inductor

[analog_chip]

Hi,

I have a center tapped symmetric differential inductor whose both inductors are tuned out. I have injected current I1 in one branch and want to know I2 induced in another branch(mutual inductance/coupling). How is I1 and I2 and their phases related theoretically?

 

[D.A.(Tony)Stewart]

It depends on winding method and how the centre tap is created.

If a single wire is wound then the centre tap connects the output of one inductor to the input of the next , thus the opposite polarity or phase exists on each side.

If two wires are wound (bi-filar) and the centre tap is one end pair connected, then the currents oppose each other in the core and cancel.

If a center tap inductor in the 1st case is reversed on one pair , or in the 2nd case one winging pair is reversed , then they will be in-phase. The differences also being with coupling capacitance and dielectric breakdown.

 

[volker@muehlhaus]

How is I1 and I2 and their phases related theoretically?

The usual case is differential mode, I2=-I1

 

[analog_chip]

Hi SunnySkyguy,

Can you provide some references or links that can educate me in these?