A computationally efficient method for calculation of strand eddy current losses in electric machines
A computationally efficient method for calculation of strand eddy current losses in electric machines
复制标题
一种计算电机中绞线涡流损耗的高效计算方法
DOI：
10.1109/ecce.2016.7854667
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Y. C. Chong
中科院分区：
文献类型：
--
作者：
A. Fatemi;D. Ionel;N. Demerdash;D. Staton;R. Wróbel;Y. C. Chong
以分数槽集中绕组永磁电机为研究对象，提出了一种基于有限元的任意绕组电机定子绕组涡流损耗的快速计算方法。该方法特别适合于大规模设计优化算法中的实现，在这种算法中，对高速下的此类损耗的定性表征最有利于识别具有最低总损耗(包括定子绕组中的交流损耗)的设计解。与对于所有设计变化假设恒定的槽填充系数SF的常见做法不同，所开发的方法中的最大SF是基于单个槽结构/尺寸和绞线规格来确定的。此外，代替在初始FE模型中对导体线束的详细建模，这显著增加了问题的复杂性，采用了遵循随后的磁通映射技术的替代矩形线圈建模，以确定每个单独线束上的撞击磁通。本文的研究重点是开发一种计算效率高的交流绕组损耗计算方法，该方法可同时考虑电机的电磁和热力特性，可用于优化设计。此外，还研究了电负载对特定机械设计的交流翼损效应的影响，这是一个文献中较少关注的问题。将讨论12槽10极定子组件上的交流损耗的实验测量，以验证仿真结果中的现有趋势。
In this paper, a fast finite element (FE)-based method for the calculation of eddy current losses in the stator windings of randomly wound electric machines with a focus on fractional slot concentrated winding (FSCW) permanent magnet (PM) machines will be presented. The method is particularly suitable for implementation in large-scale design optimization algorithms where a qualitative characterization of such losses at higher speeds is most beneficial for identification of the design solutions which exhibit the lowest overall losses including the ac losses in the stator windings. Unlike the common practice of assuming a constant slot fill factor, sf, for all the design variations, the maximum sf in the developed method is determined based on the individual slot structure/dimensions and strand wire specifications. Furthermore, in lieu of detailed modeling of the conductor strands in the initial FE model, which significantly adds to the complexity of the problem, an alternative rectangular coil modeling subject to a subsequent flux mapping technique for determination of the impinging flux on each individual strand is pursued. The research focus of the paper is placed on development of a computationally efficient technique for the ac winding loss derivation applicable in design-optimization, where both the electromagnetic and thermal machine behavior are accounted for. The analysis is supplemented with an investigation on the influence of the electrical loading on ac winging loss effects for a particular machine design, a subject which has received less attention in the literature. Experimental ac loss measurements on a 12-slot 10-pole stator assembly will be discussed to verify the existing trends in the simulation results.
影响因子：
2.1
作者：
L. Wu;Z. Zhu;D. Staton;Mircea Popescu;D. Hawkins
通讯作者：
L. Wu;Z. Zhu;D. Staton;Mircea Popescu;D. Hawkins