Parallel wires inductance

QuickField simulation example

Engineering question
How to find parallel wires inductance

Engineering answer
Set up a plane-parallel QuickField DC Magnetics problem for parallel wires and evaluate inductance from computed field results.

Typical applications
two-wire transmission lines, overhead conductors, parallel wire systems

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Problem Type
Plane-parallel problem of DC magnetics.

Geometry

d = 500 mm, R = 4 mm.

Given
Current of the wires I = 1 A

Task
Parallel wires inductance
One can calculate inductance by the following analytical formula:
L = μ₀ L/π·[ ln(d/R) + 1/4 ], where L - line length.

Solution
Length of the two wire line is considered to be L=1 m. Inductance is calculated by "Inductance wizard" using two methods: using magnetic flux linkage and using magnetic field energy.

Result
Magnetic flux density distribution.

*Reference: http://en.wikipedia.org/wiki/Inductance.

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