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首页> 外文期刊>IEEE Transactions on Magnetics >Equivalent 2-D FEA Modeling Method for AC Loss Analysis of High-Speed Electrical Machines With Litz Winding Considering Incomplete Transposition
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Equivalent 2-D FEA Modeling Method for AC Loss Analysis of High-Speed Electrical Machines With Litz Winding Considering Incomplete Transposition

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摘要

In high-speed electrical machines (HSEMs), litz wire shows great performance on reducing the ac loss under complete transposition, which is well-known. However, due to technological limitations, its pitch cannot be made to match the stack length in small aspect ratio machines, bringing significant ac loss. And 3-D finite elements analysis (FEA) modeling method is too complicated for its twisted structure and time-consuming. This article proposed an equivalent 2-D FEA modeling method for HSEMs with litz winding. The machine is divided into several parts along the axial equally, and each part is established by a 2-D FEA model approximatively in which litz winding transposition is considered. All 2-D models are connected in series in field-circuit coupling model. The influences of structural parameters on ac loss are also analyzed, providing guidance for the optimal design of litz winding in HSEMs.

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