Axial Vibration Characteristic of Levitation Force for Radial-Type Superconducting Magnetic Bearing

被引:4
作者
Ai, Liwang [1 ]
Zhang, Guomin [2 ,3 ]
Li, Wanjie [2 ,3 ]
Liu, Guole [2 ,3 ]
Qiu, Qingquan [2 ,3 ]
Song, Naihao [2 ,3 ]
机构
[1] Henan Polytech Univ, Sch Elect Engn & Automat, Jiaozuo 454000, Henan, Peoples R China
[2] Chinese Acad Sci, Key Lab Appl Superconduct, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China
基金
中国国家自然科学基金;
关键词
Axial vibration; dynamic characteristic; FEM; levitation force; superconducting magnetic bearing;
D O I
10.1109/TASC.2019.2932672
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Dynamic levitation behavior is crucial to the stable operation of superconducting magnetic bearing (SMB). In this article, we mainly focus on the axial vibration characteristic of levitation force for the radial-type SMB. The axial levitation force is calculated by using the H-formulation two-dimensional (2-D) axial-symmetry finite element model established in COMSOL. Also, experimental measurements of the levitation force are carried out under the field-cooling and zero-field cooling conditions. The comparisons show a good agreement and validate the modeling method. Based on the model, the dynamic levitation behaviors of radial-type SMB are investigated when the permanent magnet (PM) rotor vibrates axially. The influences of different axial vibration amplitude and period on the levitation behavior are mainly concerned and validated by experimental measurements. It is concluded that the levitation force will vary as a rule similar to the position variation of the PM rotor and the overall attenuation trend is similar to the trend of relaxation for the levitation force. Besides, the degree of attenuation increases obviously and is related to the vibration period and amplitude. The obtained results may be useful to the study of dynamic levitation behavior and the engineering applications of SMB.
引用
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页数:7
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