Stranded wire - QuickField simulation example
The wire consists of many insulated transposed strands.
How can Joule losses in the stranded wire winding be calculated?
Answer Typical applications Geometry
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* Reference: Wikipedia : Stranded wire
Engineering question
Model the transposed strands with equal current in each strand and calculate the AC magnetic field and resulting Joule losses in the winding.
stranded conductors, litz wire windings, high-frequency conductors
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Simulation problem
Problem Type
Axisymmetric problem of AC magnetics.
Core relative permeability μ = 500,
Copper conductivity g = 56 MS/m,
Current I = 1 A (magnitude), frequency f=50 kHz.
Wire cross-section area S=0.1112 mm², number of strands w=277
Calculate Joule losses in the stranded wire winding.
As the wire strands are transposed, each one carries the same current. To force this condition upon strands the same label is assigned to them. In label properties "connected in series" flag is switched on and the current value 1/w of total conductor current is specified for the strand.
Interwoven stranded wire features 2% greater length comparing to straight wire. We take this into account by increasing electric resistivity.
We will simulate only center section of the long solenoid.
Current density distribution in the stranded wire.
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