电工技术学报  2023, Vol. 38 Issue (2): 330-339    DOI: 10.19595/j.cnki.1000-6753.tces.211928
电机及其系统 |
12/14磁悬浮开关磁阻电机悬浮力全周期模型构建
杨帆1, 袁野1, 祝贵1, 孙玉坤1, 孟凡斌2, 南钰2
1.江苏大学电气信息工程学院 镇江 212013;
2.国网河南省电力公司开封供电公司 开封 475000
Suspension Force Modeling for 12/14 Bearingless Switched Reluctance Motor Considering Flux Multi Teeth Hinge
Yang Fan1, Yuan Ye1, Zhu Gui1, Sun Yukun1, Meng Fanbin2, Nan Yu2
1. School of Electrical Information Engineering Jiangsu University Zhenjiang 212013 China;
2. Kaifeng Power Supply Company State Grid Henan Electric Power Company Kaifeng 475000 China
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摘要 12/14磁悬浮开关磁阻电机悬浮系统磁通与多个转子齿铰链,导致悬浮系统的等效磁路在整个转子位置周期内具有变结构特征,需要提出新的建模方法,揭示全位置周期内的悬浮力动态变化特性。针对上述问题,该文基于有限元模型开展了12/14磁悬浮开关磁阻电机悬浮力电磁特性分析,明晰了转子位置动态变化下的悬浮系统磁通铰链规律。利用麦克斯韦应力法“区域性”建模优势,提出“主-边磁路并行解析”策略,构建了考虑磁通多齿铰链的全周期悬浮力数学模型。通过有限元分析的方法验证了模型优良特性。开展实验研究,结果表明,建立的悬浮力模型可以有效揭示12/14磁悬浮开关磁阻电机独特本体结构下的悬浮力特性,实现稳定悬浮,进一步验证了所提建模方法的可行性。该方法可以推广至一类具有悬浮系统磁通多齿铰链特征的磁悬浮开关磁阻电机建模研究中。
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杨帆
袁野
祝贵
孙玉坤
孟凡斌
南钰
关键词 悬浮系统磁通悬浮力建模磁悬浮开关磁阻电机麦克斯韦应力法有限元分析    
Abstract:Bearingless switched reluctance motor (BSRM) has the characteristics of traditional switched reluctance motor and magnetic suspension bearing. Therefore, it has broad application prospects in flywheel batteries. The inherent coupling between suspension and torque exists in the traditional dual winding BSRM. Profuse kinds of topologies, such as 8/10 BSRM, 12/10 BSRM, and permanent magnet biased BSRM, have been proposed successively. The 12/14 BSRM is a representative topology of permanent magnet bias BSRM. However, the 12/14 BSRM suspension system generally adopts a simplified model. The magnetic flux of the 12/14 BSRM suspension system intersects with multiple rotor salient poles, which is subject to the dynamic constraints of the rotor position. Therefore, it is necessary to further explore the modeling method of 12/14 BSRM suspension force.
The operating principle and topology of 12/14 BSRM are analyzed. The stator of torque system is U-shaped structure, and torque is generated by the principle of minimum reluctance. The suspension system has four phases, which are the same as the working principle of magnetic bearings. The finite element analysis model is built in the ANSYS software, and the rotor pole distance is taken as an analysis cycle. The result of finite element analysis shows that the suspension force changes dynamically with the rotor position, and the suspension force presents a quasi sinusoidal distribution with the rotor position. However, the traditional suspension force model cannot reveal the dynamic characteristics of 12/14 BSRM suspension force and rotor position. Therefore, by analyzing the finite element results, the cross link law between the stator pole and the rotor pole in typical positions is obtained and the equivalent magnetic circuit of the suspension system is constructed.
The magnetic flux density of the suspension system is analyzed. The bias flux density is provided by the axial magnetized permanent magnetic ring, which is approximately constant. The control main flux density and control edge flux density in the control flux density are calculated respectively. The magnetic flux area of the suspension system, including the main magnetic flux area and the edge magnetic flux area, is calculated. The main flux area is constant, and the edge flux area is positively related to the edge flux width. The corresponding change curve is obtained according to the clear width change rule of the stator edge flux and rotor cross link. Fourier analysis is carried out and the fundamental wave is taken to obtain the analytical model of the area change of the edge magnetic flux. Comparing the finite element analysis value with the model calculation value, the full cycle suspension force model considering the flux multi tooth hinge constructed can describe the dynamic variation characteristics of the suspension force, which verifies the validity of the model.
Based on the full cycle suspension force model and the experimental test platform of DSPACE, the experimental research of 12/14 BSRM was carried out. The rotor floating time is about 40ms. The displacement amplitude after fluctuation is about 80μm. The suspension control precision and response speed are good. The displacement amplitude of the two degrees of freedom based on the full cycle suspension control system is 60μm, When the rotor is stably suspended. In the traditional suspension control system, the displacement amplitude of the rotor with two degrees of freedom is 80μm. The model is verified by finite element analysis and experiment, and the results show that the full cycle suspension force model accurately represents the suspension force characteristics of 12/14 BSRM, establishing the foundation for accurate control of suspension force. The control strategy of 12/14 BSRM for more accurate suspension utilization of the model is realized. Implemented 12/14 BSRM for more precise suspension control utilizing the model.
Key wordsSuspension flux    suspension force modeling    bearingless switched reluctance motor    Maxwell stress method    finite element analysis   
收稿日期: 2021-11-25     
PACS: TM352  
基金资助:国家自然科学基金重点项目(51877101)、江苏省重点研发计划(BE2021094)、中国博士后科学基金项目(2021M702413)、江苏省优势学科(PAPD-2018-87)和江苏省研究生科研与实践创新计划项目(KYCX19_1607)资助
通讯作者: 袁 野 男,1991年生,副教授,硕士生导师,研究方向为磁悬浮电机设计与非线性控制。E-mail: 1000050003@ujs.edu.cn   
作者简介: 杨 帆 男,1991年生,博士研究生,研究方向为磁悬浮电机设计。E-mail: 1170557230@qq.com
引用本文:   
杨帆, 袁野, 祝贵, 孙玉坤, 孟凡斌, 南钰. 12/14磁悬浮开关磁阻电机悬浮力全周期模型构建[J]. 电工技术学报, 2023, 38(2): 330-339. Yang Fan, Yuan Ye, Zhu Gui, Sun Yukun, Meng Fanbin, Nan Yu. Suspension Force Modeling for 12/14 Bearingless Switched Reluctance Motor Considering Flux Multi Teeth Hinge. Transactions of China Electrotechnical Society, 2023, 38(2): 330-339.
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