Modeling and Analysis of Novel Star-Delta Winding Configuration with Odd Slot Numbers for Reduced Space Harmonics Using Winding Function

2019 IEEE International Electric Machines & Drives Conference (IEMDC) Pub Date : 2019-05-12 DOI:10.1109/IEMDC.2019.8785395

S. Mukundan, H. Dhulipati, G. Feng, J. Tjong, N. Kar

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引用次数: 3

Abstract

Existing literature on 3-phase combined star-delta winding topologies only focuses on even slot numbers or conventional multiples of 6, since they emulate a 6-phase configuration with a phase difference of 30° between the star and delta connected sets. Contrarily, if a turns ratio of √3 can be achieved with proper coil and turns distribution, unconventional odd slot numbers and non-multiples of 6 can be implemented resulting in various possible design solutions with minimum spatial harmonic contents. Therefore, this paper focuses on modeling and analysis of a novel star-delta winding configuration using unconventional odd slot numbers for fractional-slot wound machines towards maximum torque density and reduced space harmonic content. Initially, a generalized analytical model using winding function theory for any slot-pole combination is presented. Furthermore, a comprehensive comparative analysis of a novel odd slot-pole combination and a conventional topology is presented in terms of spatial harmonic contents, saliency, torque density, torque ripple, rated machine efficiency and overall operating speed range.

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基于绕线函数的新型奇槽星三角绕线构型空间谐波化建模与分析

现有的关于三相组合星形-三角形绕组拓扑的文献只关注偶数槽数或6的传统倍数，因为它们模拟的是星形连接集和三角形连接集之间相位差为30°的6相配置。相反，如果线圈和匝数分布合适，匝数比为√3，则可以实现非常规的奇槽数和非6的倍数，从而实现各种可能的设计方案，使空间谐波含量最小。因此，本文重点对一种采用非常规奇槽数的星形三角形绕组结构进行建模和分析，以实现最大转矩密度和降低空间谐波含量。首先，利用绕线函数理论建立了任意槽极组合的广义解析模型。此外，从空间谐波含量、显著性、转矩密度、转矩脉动、额定机器效率和总运行速度范围等方面对新型奇槽极组合和传统拓扑结构进行了全面的比较分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 IEEE International Electric Machines & Drives Conference (IEMDC)

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