五自由度盘式无轴承电机运行机理与优化准则研究  

Research on the Operation Principle and Optimization Rules for the Bearingless Axial Flux Motor With 5-DOFs

作　　者：裴同豪 李大伟 刘嘉韵 孔武斌 曲荣海[1] PEI Tonghao;LI Dawei;LIU Jiayun;KONG Wubin;QU Ronghai(School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430000,Hubei Province,China)

机构地区：[1]华中科技大学电气与电子工程学院,湖北省武汉市430000

出　　处：《中国电机工程学报》2022年第20期7588-7598,共11页Proceedings of the CSEE

摘　　要：五自由度盘式无轴承电机(five degrees of freedom controlled bearingless axial flux motor,5-DOF BLAM)因其可以依靠电磁力实现转子全自由度的主动悬浮,且具有无摩擦、无污染、免维护、寿命长等优点,在医药、半导体、航空航天等领域有潜在的应用前景,受到研究人员的广泛关注。根据转子所带负载的不同,5-DOF BLAM各自由度对主动悬浮力、力矩的要求也不同。因此,优化5-DOF BLAM使其能够在最小的悬浮电流下满足转子负载对各自由度主动悬浮力、力矩的需求是5-DOF BLAM设计中的重要环节。该文对任意转子极对数下5-DOF BLAM各自由度的悬浮机理进行分析,并根据分析结果给出3条5-DOF BLAM通用的控制与设计准则。然后,基于所得通用准则设计一款转子7对极的5-DOF BLAM,并对其进行有限元分析。分析结果证明了前两条通用准则的正确性。同时,仿真分析不同定转子内外径与裂比下,5-DOF BLAM各自由度主动悬浮力、力矩的变化规律,证实了第3条通用准则的正确性。最后,基于样机与实验平台测试了该文设计的5-DOF BLAM的悬浮过程。实验结果表明,该文设计的5-DOF BLAM能够根据通用准则实现各自由度独立解耦控制,5-DOF BLAM转子能够实现五自由度稳定悬浮。The rotor in five degrees of freedom controlled bearingless axial flux motor(5-DOF BLAM)can be suspended by the electromagnetic force.Thus,there are many advantages such as no friction,no pollution,maintenance-free,and long operating life.Therefore,5-DOF BLAM has broad application prospects in the fields of pharmaceutical,aerospace,and semiconductor industries.Depending on the load carried by the rotor,a 5-DOF BLAM has different requirements for active suspension force/torque.Hence,it is important to optimize the 5-DOF BLAM to match the requirements for the active suspension force/torque under the minimum levitation current.In this paper,the operation mechanism of the 5-DOF BLAM with arbitrary rotor pole pairs was analyzed.Then,three general rules of design and control of the 5-DOF BLAM were proposed.Next,a 5-DOF BLAM with a 7-pole-pair rotor was designed following the above general rules and analyzed by the finite element analysis(FEA)method.The validity of the general rules 1 and 2 can be confirmed by the FEA results.Moreover,this paper also analyzed the variation of active suspension force/torque of the 5-DOF BLAM under different stator/rotor diameters and split ratios,which confirmed the validity of the general rule 3.Finally,the suspension process of the 5-DOF BLAM prototype was also tested.The experimental results show that the designed 5-DOF BLAM can realize independent decoupling control of each degree according to the obtained general rules,and the 5-DOF BLAM rotor can realize stable suspension with 5-DOFs.

关 键 词：盘式无轴承电机 五自由度 通用准则 机理分析 

分 类 号：TM30[电气工程—电机]