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.

Problem Type
Axisymmetric problem of AC magnetics.

Geometry

Given
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.

Task
Compare electric losses in the winding with solid wire and with litz wire.

Solution
Each strand wire has its own label. The connection scheme is specified in external circuit file.

Results
Comparison of losses in solid wire and in litz wire.

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

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