Litz wire losses - QuickField simulation example
Litz wire is used to reduce winding losses at high frequency. Litz wire consists of 7 insulated transposed wires.
How to calculate the winding-loss reduction from Litz-wire strands relative to a solid conductor at high frequency?
Answer Typical applications Geometry
Given
Task
Solution
Results
* Reference: http://en.wikipedia.org/wiki/Litz_wire
Engineering question
Model each insulated strand separately with its circuit connection and compare the calculated AC losses with those of an equal-area solid wire.
litz wire inductors, high-frequency coils, RF inductive components
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Simulation problem
Problem Type
Axisymmetric problem of AC magnetics.
Core permeability μ = 500,
Copper conductivity g=56 MS/m,
Current I=1 A (RMS).
Conductor cross-sectional area S=0.126 mm².
Frequency f=1 kHz.
Compare electric losses in the winding with solid wire and with litz wire.
Each strand wire has its own label. The connection scheme is specified in external circuit file.
Comparison of losses in solid wire and in litz wire.
Frequency [kHz]
Solid wire losses [W]
Litz wire losses [W]
0
0.09
0.09
50
0.24
0.13
100
0.66
0.25
200
1.8
0.66
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