Radial force model of a bearingless switched reluctance motor with sharing suspension windings considering magnetic saturation

被引：0
|
作者：
Wang X.-L. [1 ]
Cui R.-Z. [1 ]
Hao Y. [1 ]
Liu Y.-N. [1 ]
Zhao P.-Y. [1 ]
机构：
[1] School of Electrical Engineering, Beijing Jiaotong University, Beijing
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2021年 / 25卷 / 06期
关键词：
Analytical model; Bearingless switched reluctance motor; Magnetic saturation; Magnetization curve fitting; Radial force; Sharing suspension windings;
D O I：
10.15938/j.emc.2021.06.006
中图分类号：
学科分类号：
摘要：
Bearingless switched reluctance motors (BSRM) generally work in the region of magnetic saturation, and the establishment of analytical model is the basis of the stable suspension control. Aimed at the serious non-linearity of the radial force of the bearingless reluctance motor, a fitting method for describing the magnetization characteristics of the material with a linear relationship is proposed. This method was used to obtain the air gap magnetic field strength for a sharing suspension windings BSRM, and the full-period radial force analytic model considering magnetic saturation was derived by Maxwell stress tensor method. The finite element model of the prototype was built and the simulation analysis was performed. The simulation results are compared with the calculation results of the linear model and the analytical model considering magnetic saturation, which verifies the accuracy of the model under the state of large current saturation. The radial force analytical model established can calculate the radial force of the motor accurately in the entire motor working area without segmentation. It has the characteristics of fast calculation speed and high universality when using in a control scheme, which lays a theoretical foundation for the research of BSRM control strategies. © 2021, Harbin University of Science and Technology Publication. All right reserved.
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页码：46 / 53
页数：7
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