Dual three-phase operation of single neutral symmetrical six-phase machine for improved performance

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society Pub Date : 2015-11-01 DOI:10.1109/IECON.2015.7392259

H. S. Che, W. Hew

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引用次数: 17

Abstract

Among multiphase machines of different phase numbers, six-phase machine is one of the most popular and widely studied multiphase machine. By displacing the two three-phase windings with an angle of 30 degrees, 60 degrees or 0 degree, the machine can be configured as an asymmetrical six-phase, symmetrical six-phase or dual three-phase machine respectively. At the same time, the stator windings can be configured with either two or single neutral point. Till date, most discussions on six-phase machines focus mainly on two neutrals configuration, due to the simpler control requirements and better dc-bus utilization. Nevertheless, single neutral connection should be given due attention, considering the fact that this structure offers better fault tolerance. In this paper, the performance of symmetrical six-phase with single neutral point is investigated. It is shown that by altering the winding terminals' connections, a symmetrical six-phase machine can operate as a dual three-phase machine. By doing so, zero-sequence voltage injection becomes possible, hence giving improved performance.

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双三相运行单中性点对称六相机，提高性能

在不同相数的多相电机中，六相电机是最受欢迎和广泛研究的多相电机之一。通过将两个三相绕组以30度、60度或0度的角度进行位移，可分别配置为不对称六相、对称六相或双三相电机。同时定子绕组可配置两个或单个中性点。到目前为止，大多数关于六相电机的讨论主要集中在两个中性点配置上，因为控制要求更简单，直流母线利用率更高。然而，考虑到这种结构提供了更好的容错性，应该给予单中性点连接适当的关注。本文研究了具有单中性点的对称六相电路的性能。结果表明，通过改变绕组两端的连接方式，对称六相电机可以作为双三相电机运行。通过这样做，零序电压注入成为可能，从而提高了性能。

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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IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

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