Optimization and Characteristic Analysis of HTS Double-stator Permanent Magnet Vernier Machine

doi:10.11985/2023.03.019

Abstract

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

CLC Number:

TM351

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.

Figures/Tables 15

References 20

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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