高温超导双定子永磁游标电机的优化与特性分析*

doi:10.11985/2023.03.019

摘要/Abstract

摘要：

双定子永磁游标电机可以在提高电机调制磁场的同时降低电枢主电感，具有高转矩密度和高功率因数的优势，然而其漏磁严重的缺陷影响了此类电机的推广应用。针对此问题，通过在内定子侧引入高温超导块材料，在改善磁通调制效果的同时有效降低了漏磁。首先，建立11对极12槽的二维电机模型并进行有限元分析，明确了电流超前角对负载转矩的影响作用。其次，利用参数化分析对电机主要结构尺寸进行优化，并综合考虑工艺设计，确定了高温超导块材料的最优尺寸选择。然后，对比分析了优化前后双定子永磁游标电机(Dual-stator permanent magnet vernier machine，DSPMVM)的电磁性能，结果表明在引入高温超导块材料后可显著提高电机功率密度和永磁体的利用率，较好地解决了因双气隙结构导致的漏磁问题。

关键词: 永磁游标电机, 高温超导块, 磁场调制, 有限元分析

Abstract:

The double stator permanent magnet vernier machine can reduce the main inductance of the armature while increasing the modulating magnetic field of the machine. Although it has the advantages of high torque density and high power factor, its serious flux leakage defect affects the popularization and application of this type of machine. In order to solve this problem, HTS bulks are introduced on the inner stator side, which can effectively reduce the magnetic flux leakage while improving the magnetic flux modulation effect. Firstly, the most important thing is to establish a 2-D machine model with 11 pairs of poles and 12 slots for finite element analysis to clarify the effect of the current lead angle on the load torque. Secondly, the main structural dimensions of the machine are optimized by parametric analysis, and the optimal size selection of HTS bulks are determined by comprehensively considering the process design. Then, the electromagnetic performance of the dual-stator permanent magnet vernier machine before and after optimization is compared and analyzed. The results show that by using the HTS bulks can not only efficiently improve the flux modulation effect of the vernier machine, but also greatly reduce the machine flux leakage.

Key words: Permanent magnet vernier machine, high temperature superconductor, flux-modulation, finite element analysis

中图分类号:

TM351

吕盈盈, 包广清. 高温超导双定子永磁游标电机的优化与特性分析^*[J]. 电气工程学报, 2023, 18(3): 175-183.

LÜ Yingying, BAO Guangqing. Optimization and Characteristic Analysis of HTS Double-stator Permanent Magnet Vernier Machine[J]. Journal of Electrical Engineering, 2023, 18(3): 175-183.

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序号	参数	数值
1	外/内定子槽数	12
2	转子极对数p_r	11
3	绕组极对数p_s	1
4	外定子外径/内径/mm	640/434
5	外定子轭部厚度/mm	60
6	内定子轭部厚度/mm	66
7	外气隙/内气隙长度/mm	1.5/1.5
8	永磁体厚度/mm	14
9	永磁体极弧系数α_p	0.866
10	永磁体剩余磁感应强度B_r/T	1.253
11	永磁体相对磁导率μ_r	1.05
12	硅钢片	50WW470
13	叠片长度/mm	100
14	每相串联匝数/绕组节距	80/整距
15	槽满率	0.6
16	槽开口系数	0.6
17	电负荷/(A/mm²)	200
18	电流密度/(A/mm²)	1.9
19	转速/(r/min)	30