Design and harmonic analysis of single winding bearingless PM synchronous motor with high winding coefficient

IF 1.1 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC International Journal of Applied Electromagnetics and Mechanics Pub Date : 2024-02-27 DOI:10.3233/jae-230045

Huimin Wang, Peijun Guan, Jiacheng Xu, Liyan Guo

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Abstract

Compared with double-winding bearingless permanent magnet synchronous motor, single-winding bearingless permanent magnet synchronous motor (SBPMSM) has the advantages of low copper loss and low failure rate. However, if the slot-pole combination of SBPMSM is not reasonably selected, the winding coefficient will be reduced, and even many advantages of the single-winding structure will be offset. In this paper, a single-winding design method based on magnetomotive force (MMF) star diagram is proposed, which can ensure high winding coefficient. The design process of the proposed single winding structure is introduced. This method can match the appropriate number of stator slots according to the number of rotor poles, and the winding phase separation design can be realized by reversing the slot number transposition. The mathematical models of the suspension force and torque of the bearingless permanent magnet synchronous motor are derived considering the magnetic field harmonics, and the 6-slot/2-pole SBPMSM and 18-slot/8-pole SBPMSM are taken as examples to analyze the magnetic field. The finite element simulation models of 6-slot/2-pole SBPMSM and 18-slot/8-pole SBPMSM are built and analyzed. Through the analysis of electromagnetic torque, suspension force and air-gap magnetic field under different magnetic fields, the general rules of main torque fluctuation and suspension force fluctuation are summarized.

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高绕组系数单绕组无轴承永磁同步电机的设计与谐波分析

与双绕组无轴承永磁同步电机相比，单绕组无轴承永磁同步电机（SBPMSM）具有铜损低和故障率低的优点。但是，如果 SBPMSM 的槽极组合选择不合理，就会降低绕组系数，甚至会抵消单绕组结构的许多优点。本文提出了一种基于磁动势（MMF）星形图的单绕组设计方法，它能确保较高的绕组系数。本文介绍了单绕组结构的设计过程。该方法可根据转子极数匹配合适的定子槽数，并通过反转槽数换位实现绕组相位分离设计。考虑到磁场谐波，推导了无轴承永磁同步电机悬挂力和转矩的数学模型，并以 6 槽/2 极 SBPMSM 和 18 槽/8 极 SBPMSM 为例分析了磁场。建立并分析了 6 槽/2 极 SBPMSM 和 18 槽/8 极 SBPMSM 的有限元仿真模型。通过分析不同磁场下的电磁转矩、悬浮力和气隙磁场，总结了主转矩波动和悬浮力波动的一般规律。

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来源期刊

International Journal of Applied Electromagnetics and Mechanics 物理-工程：电子与电气

CiteScore

1.70

自引率

0.00%

发文量

100

审稿时长

4.6 months

期刊介绍： The aim of the International Journal of Applied Electromagnetics and Mechanics is to contribute to intersciences coupling applied electromagnetics, mechanics and materials. The journal also intends to stimulate the further development of current technology in industry. The main subjects covered by the journal are: Physics and mechanics of electromagnetic materials and devices Computational electromagnetics in materials and devices Applications of electromagnetic fields and materials The three interrelated key subjects – electromagnetics, mechanics and materials - include the following aspects: electromagnetic NDE, electromagnetic machines and devices, electromagnetic materials and structures, electromagnetic fluids, magnetoelastic effects and magnetosolid mechanics, magnetic levitations, electromagnetic propulsion, bioelectromagnetics, and inverse problems in electromagnetics. The editorial policy is to combine information and experience from both the latest high technology fields and as well as the well-established technologies within applied electromagnetics.