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Main > Application > Sample problems

Parallel wires inductance

Problem type:
Plain-parallel problem of magnetostatics.

Geometry:

two wire line model

d = 500 mm, r = 4 mm.

Given:
Current of the wires I = 1 A

Find:
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.

parallel_wires_inductance

 

QuickField

Theory*

L, μH/m

2.028

2.031

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