定子绕组铜耗是高速永磁电机损耗的主要来源之一，对于多根并绕的散嵌线绕组，由于各导线所处的漏磁场不同，导致感应出的电压也不同，从而会在导线之间形成环流，所带来的额外交流附加铜耗已成为限制该类电机功率密度以及效率提高的主要因素。本文主要针对并绕导线间由于环流引起的不同股线之间电流不均展开研究，通过绕组端部换位的方式实现了对绕组环流损耗的抑制，并通过设计实验验证了环流抑制分析的有效性。
Copper loss in stator windings is one of the main sources of loss in high-speed permanent magnet motors. For multi-coiled loose-embedded windings, the voltage induced by different leakage magnetic fields of each wire is different, which leads to the formation of circulating current between wires. The extra AC additional copper loss has become the main factor limiting the power density and efficiency improvement of this kind of motors In this paper, the current imbalance between different strands caused by circulating current between parallel wires is studied. The circulating current loss of windings is suppressed by transposition of winding ends, and the effectiveness of circulating current suppression is verified by design experiments.
2024,46(15): 57-62 收稿日期：2023-10-26
DOI：10.3404/j.issn.1672-7649.2024.15.010
分类号：TM303.1
基金项目：国家自然科学基金资助项目（52107063，51977217）
作者简介：杨清宇（1998 – ），男，硕士研究生，研究方向为电力集成技术
参考文献：
[1] LEHIKOINEN A, CHIODETTO N, LANTTO E, et al. Monte Carlo analysis of circulating currents in random wound electrical machines[J]. IEEE Transactions on Magnetics, 2016, 52(8): 1-12.
[2] HAMALAINEN H, PYRHONEN J, NERG J. Ac resistance factor in one layer form-wound winding used in rotating electrical machines[J]. IEEE Transactionson Magnetics, 2013, 49(6): 2967–2973.
[3] 薛继印, 杨在葆, 刘永, 等. 变压器绕组并联支路不等匝引起环流问题的分析与探讨[J]. 变压器, 2021, 58(8): 21-23.
[4] 任亚军, 韩军锋, 张峰. 电力变压器不同绕组导线换位方式下环流损耗对比分析[J]. 电工电气, 2021(1): 30-34.
[5] 王泰丽. 多工况下同步调相机定子线棒环流损耗计算[D]. 哈尔滨: 哈尔滨理工大学, 2019.
[6] 冯慈璋. 工程电磁场导论[M]. 北京: 高等教育出版社, 2000.
[7] 武岳, 张志锋. 轴向磁通永磁电机扁铜线交流铜耗的混合解析计算及抑制[J]. 电工技术学报: 2023, 38(24): 6609–6618.
[8] ROEBEL L. Electrical Conductor: US19130751640[P]. US1144252A.
[9] 梁艳萍, 柳杨, 王晨光. 大型水轮发电机定子绕组新型组合换位方法分析[J]. 中国电机工程学报, 2016, 36: 3092-3100.
[10] XIA Sheng, YAO Yingying. Optimization of transposition in stator bars of hydro-gcncrators[C]//2012 Sixth International Conference on ElcctromagncticFicld Problcms and Applications, 2012: 1–4.
[11] 梁艳萍, 乔雪, 边旭, 等. 改进漏感电动势法计算换位线棒股线电流及环流损耗[J]. 电工技术学报, 2017, 32(17): 164-171.
[12] JIANG Yapeng, CHEN Junquan, WANG Hanghang, et al. Semi-analytical method of form-wound windig loss considering circulating current effect[J]. IEEE Transactionson Magnetics, 2021, 58(2): 1–4.
