How to calculate the total impedance of a wire, considering a constant stray inductance acting on it - Electrical Engineering Stack Exchange most recent 30 from electronics.stackexchange.com 2019-07-17T02:53:21Z https://electronics.stackexchange.com/feeds/question/285367 http://www.creativecommons.org/licenses/by-sa/3.0/rdf https://electronics.stackexchange.com/q/285367 0 How to calculate the total impedance of a wire, considering a constant stray inductance acting on it Xynon https://electronics.stackexchange.com/users/128714 2017-02-09T07:30:50Z 2017-02-16T09:24:05Z <p>Consider two parallel wires A and B of equal lengths, carrying in-phase AC’s. Assume that, the frequency is so low relative to the distance R between them, that the phase delay is ignorable and that there is an even distribution of current on every segment of the wires.</p> <p>I’m trying to calculate, what would be the total impedance (Znet) on one of the wires when their changing magnetic fields are negatively affecting each other (mutual inductance). I tried to break the net current (at time t) into two parts as you can see below:</p> <p>One part of the net current is the current which would occure normally caused by the input voltage.</p> <p>Other part is the current in opposite direction, caused by solely the mutual inductance.</p> <p><a href="https://i.stack.imgur.com/KD5JS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KD5JS.png" alt="enter image description here"></a></p> <p>And I summed up the two to find total current. I don’t know if this is a right thing to do. Summing up opposite currents maybe allright with superposition theorem but physically it doesn’t “feel” right or make sense. That’s why I hesitate. </p> <p>If the idea is right, then I will to try to adapt it to "two parallel antennas situation" to calculate their effective impedances and match the input impedance to that value.</p>