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定子模块间隙对分段定子屏蔽式永磁同步电动机性能的影响。

The impact of stator module gaps on the performance of canned permanent magnet synchronous motors with segmented stators.

作者信息

Ming Li, Jixin Zheng, Guanghui Du, Shuxian Lun

机构信息

School of Control Science and Engineering, Bohai University, Jinzhou, 121013, China.

School of Electrical and Control Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China.

出版信息

Sci Rep. 2025 Aug 19;15(1):30352. doi: 10.1038/s41598-025-13864-w.

DOI:10.1038/s41598-025-13864-w
PMID:40830166
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12365135/
Abstract

The segmented stator structure is applied to the canned permanent magnet synchronous motor (CPMSM) can improve the performance of the motor. However, the specific and detailed effects of varying stator module gaps on CPMSM performance, particularly efficiency and torque, require further investigation. In this paper, an iterative calculation method for the electromagnetic performance of the motor is proposed. Using this method, the influence of stator module gap on the electromagnetic performance of the CPMSM with segmented stators is analyzed under the conditions of constant current and constant torque. The calculation results are compared with the finite element calculation results. The results show that under constant current, the increase of the stator module gap leads to the decrease of the loss, torque, efficiency and power factor. Under the condition of constant torque, with the increase of the stator module gap, the loss and power factor of the CPMSM are reduced, but the efficiency of the CPMSM is gradually improving. Finally, a prototype is made and a test platform is built. The test results verify the correctness and effectiveness of the proposed method and results. This study not only provides new insights into the complex interactions between module gap size, flux distribution, harmonic content, loss mechanisms, torque output, and efficiency in this specific motor structure, but also offers guidance for the optimized design of the CPMSM.

摘要

分段定子结构应用于屏蔽式永磁同步电机（CPMSM）可提高电机性能。然而，定子模块间隙变化对CPMSM性能，特别是效率和转矩的具体详细影响，还需要进一步研究。本文提出了一种电机电磁性能的迭代计算方法。利用该方法，在恒流和恒转矩条件下，分析了定子模块间隙对具有分段定子的CPMSM电磁性能的影响。将计算结果与有限元计算结果进行了比较。结果表明，在恒流情况下，定子模块间隙的增大导致损耗、转矩、效率和功率因数的降低。在恒转矩条件下，随着定子模块间隙的增大，CPMSM的损耗和功率因数降低，但CPMSM的效率逐渐提高。最后制作了样机并搭建了测试平台。测试结果验证了所提方法和结果的正确性与有效性。本研究不仅为这种特定电机结构中模块间隙尺寸、磁通分布、谐波含量、损耗机制、转矩输出和效率之间的复杂相互作用提供了新的见解，也为CPMSM的优化设计提供了指导。

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Structural effects of asymmetric magnet shape on performance of surface permanent magnet synchronous motors.
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