12/14磁悬浮开关磁阻电机悬浮力全周期模型构建  

Suspension Force Modeling for 12/14 Bearingless Switched Reluctance Motor Considering Flux Multi Teeth Hinge

作　　者：杨帆 袁野[1] 祝贵 孙玉坤[1] 孟凡斌 南钰 Yang Fan;Yuan Ye;Zhu Gui;Sun Yukun;Meng Fanbin;Nan Yu(School of Electrical Information Engineering Jiangsu University,Zhenjiang 212013 China;Kaifeng Power Supply Company State Grid Henan Electric Power Company,Kaifeng 475000 China)

机构地区：[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

出　　处：《电工技术学报》2023年第2期330-339,共10页Transactions of China Electrotechnical Society

基　　金：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);江苏省研究生科研与实践创新计划项目(KYCX19_1607)资助。

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。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

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 

分 类 号：TM352[电气工程—电机]