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首页> 外文期刊>Magnetics, IEEE Transactions on >2-D Reduced Model for Eddy Currents Calculation in Litz Wire and Its Application for Switched Reluctance Machine
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2-D Reduced Model for Eddy Currents Calculation in Litz Wire and Its Application for Switched Reluctance Machine

机译：力兹线涡流计算的二维降维模型及其在开关磁阻电机中的应用

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摘要

The strong correlation between the level of eddy current losses and the winding geometry shows the necessity to pay attention to the manner of disposition of coils in machine slots. The conductor type, whether it is solid or stranded, also has a crucial influence. This paper suggests an electromagnetic analysis of complex stranded conductors, such as litz wire (LW) and twisted wire. Each conductor is composed of individual strands that are woven or twisted in the slot throughout the machine length. Combined with several electric circuit relationships that interpret the strands transposition, a 2-D finite-element (FE) model is developed in this paper so that the copper losses in each strand can be calculated individually. A model reduction is also proposed in the case of LWs. This allows the benefit of only one complete FE solution to find fast solutions in the slots’ domains when any variation of geometrical data occurrs. It allows adapting non-conforming subdomains’ meshes and seeing that it prevents the Newton–Raphson iterations and the moving band technique, the model reduction presents clear interests in repetitive analysis, such as winding optimization processes.
机译：涡流损耗水平与绕组几何形状之间的密切相关性表明，有必要注意机器槽中线圈的布置方式。导体类型，无论是实心的还是绞合的，也都具有至关重要的影响。本文提出了对复杂绞合导体（例如绞合线（LW）和双绞线）的电磁分析。每个导体都由单独的绞合线组成，这些绞合线在机器的整个长度上都在槽中编织或绞合。结合解释绞线换位的几种电路关系，开发了二维有限元（FE）模型，以便可以分别计算每条绞线中的铜损。在轻量级的情况下，还提出了模型简化。这样，当几何数据出现任何变化时，只有一个完整的有限元解决方案的优势才能在插槽的域中找到快速的解决方案。它可以适应不合格子域的网格，并看到它可以防止Newton-Raphson迭代和移动带技术，模型简化在重复分析（例如绕组优化过程）中表现出明显的兴趣。

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