Fast 2.5D Loss Calculation for round Litz Wires

Journal article (2023)

Authors

T. Luo High Voltage Technology Group - EEMCS
M. Ghaffarian Niasar High Voltage Technology Group - EEMCS
P.T.M. Vaessen KEMA Laboratories, High Voltage Technology Group - EEMCS
Research Group
High Voltage Technology Group (EEMCS) (TU Delft)
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Published Date

2023

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

High Voltage Technology Group

Abstract

Litz wire, which is used to suppress eddy current, always have complex structure. Solving its 3-D finite element model (FEM) requires high computational resources. This article presents a 2.5-D loss calculation method for round Litz wires, which do not need mesh. One pitch of Litz wire is set as an object. The exact structure is constructed by a recursive method and then is sliced into several sections per pitch. Each section is represented by a cross section area. Two-dimensional problems are solved based on an analytical method, which is based on magnetic vector potentials in quasi magneto-statics situation. One pitch of the Litz wire is approximately represented by the summation of 2-D problems. The proposed method is compared with 3-D FEM results, which shows the proposed method has good accuracy and fast computational speed.

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