This article presents a novel 6/8-pole changing line-start permanent-magnet synchronous motor (LSPMSM) for improving the starting and synchronization capabilities. A 6/8-pole changing stator winding with simple structure, convenient switching, and speed detection capability is designed and studied. The synchronization process, which follows the 6/8-pole winding switching process, is analyzed. The effects of the switching speed, switching phase difference, and the rotor resistance on the synchronization process, respectively, are studied. Moreover, on the basis of the improvement of the starting capability utilizing the pole changing starting strategy, the rotor resistance is appropriately designed smaller to simultaneously balance the synchronization capability. The larger maximum moment of inertia that the motor can pull into synchronization validates the analysis. Through processing, both starting and synchronization capabilities have been improved for the proposed 6/8-pole changing LSPMSM compared with the conventional 8-pole LSPMSM.

中文翻译：

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新型6/8变极LSPMSM同步过程及同步能力分析

本文介绍了一种新颖的 6/8 极变线启动永磁同步电机 (LSPMSM)，用于提高启动和同步能力。设计并研究了一种结构简单、切换方便、具有速度检测能力的6/8极变定子绕组。分析了遵循 6/8 极绕组切换过程的同步过程。分别研究了开关速度、开关相位差和转子电阻对同步过程的影响。此外，在利用变极启动策略提高启动能力的基础上，适当设计较小的转子电阻，同时平衡同步能力。电机可以拉入同步的更大的最大转动惯量验证了分析。通过处理，与传统的 8 极 LSPMSM 相比，所提出的 6/8 极变化 LSPMSM 的启动和同步能力都得到了提高。