Academic Journal
Dynamic Stiffness Analysis and Experimental Verification of Axial Magnetic Bearing Based on Air Gap Flux Variation in Magnetically Suspended Molecular Pump
| العنوان: | Dynamic Stiffness Analysis and Experimental Verification of Axial Magnetic Bearing Based on Air Gap Flux Variation in Magnetically Suspended Molecular Pump |
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| المؤلفون: | Jinji Sun, Wanting Wei, Jiqiang Tang, Chun-E Wang |
| المصدر: | Chinese Journal of Mechanical Engineering, Vol 33, Iss 1, Pp 1-11 (2020) |
| بيانات النشر: | SpringerOpen, 2020. |
| سنة النشر: | 2020 |
| المجموعة: | LCC:Ocean engineering LCC:Mechanical engineering and machinery |
| مصطلحات موضوعية: | Axial magnetic bearing (AMB), Dynamic stiffness, Magnetically suspended molecular pump (MSMP), Ocean engineering, TC1501-1800, Mechanical engineering and machinery, TJ1-1570 |
| الوصف: | Abstract Current and displacement stiffness are important parameters of axial magnetic bearing (AMB) and are usually considered as constants for the control system. However, in actual dynamic work situations, time-varying force leads to time-varying currents and air gap with a specific frequency, which makes the stiffness of appear decrease and even worsens control performance for the whole system. In this paper, an AMB dynamic stiffness model considering the flux variation across the air gap due to frequency is established to obtain the accurate dynamic stiffness. The dynamic stiffness characteristics are analyzed by means of the dynamic equivalent magnetic circuit method. The analytical results show that the amplitude of current and displacement stiffness decreases with frequency increasing. Moreover, compared with the stiffness model without considering the variation of flux density across the air gap, the improved dynamic stiffness results are closer to the actual results. Through the dynamic stiffness measurement method of AMB, experiments of AMB in magnetically suspended molecular pump (MSMP) are carried out and the experimental results are consistent with theoretical analysis results. This paper proposes the dynamic stiffness model of axial magnetic bearing considering the variation of flux density across the air gap, which improves the accuracy of the AMB stiffness analysis. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1000-9345 2192-8258 |
| Relation: | http://link.springer.com/article/10.1186/s10033-020-00469-9; https://doaj.org/toc/1000-9345; https://doaj.org/toc/2192-8258 |
| DOI: | 10.1186/s10033-020-00469-9 |
| URL الوصول: | https://doaj.org/article/d0ee7ae694d64bdab62efd6f3671a68b |
| رقم الانضمام: | edsdoj.0ee7ae694d64bdab62efd6f3671a68b |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 10009345 21928258 |
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| DOI: | 10.1186/s10033-020-00469-9 |