Transactions of China Electrotechnical Society  2021, Vol. 36 Issue (7): 1425-1433    DOI: 10.19595/j.cnki.1000-6753.tces.201050
Current Issue| Next Issue| Archive| Adv Search |
Design and Experimental Research of Magnetic Bearing Compound Displacement Sensor
Li Zhi, Su Zhenzhong, Hu Jinghua, Li Wenyin
National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan 430033 China

Download: PDF (3404 KB)   HTML (1 KB) 
Export: BibTeX | EndNote (RIS)      
Abstract  In order to solve the problems of traditional magnetic bearing displacement sensor with complex structure, poor adaptability, misplacement between detection position and actuator, and poor robustness and practicability of self-sensing method, this paper presents a novel approach for radial displacement detection in magnetic bearing system based on the detection coil. By arranging detection coils around teeth of a magnetic bearing, relative displacement along radial direction between stator and rotor can be achieved. Theory model of the proposed method is built and verified through Simulink simulation. A differential detection scheme is present to improve sensitivity and linearity, and displacement is achieved by detecting the output voltage of the half-bridge detection circuit. Static performance of the proposed method is tested on a platform. And, when the displacement is in the range of -0.3mm to 0.3mm, sensitivity and resolution are 1.2mV/μm and 7μm, respectively, showing the feasibility of displacement detection of the proposed method. The method is simple and robust, and lays a foundation for the realization of compact and reliable magnetic bearing displacement detection.
Key wordsMagnetic bearing      displacement measurement      sensor      detection coil     
Received: 19 August 2020     
PACS: TM722.7  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Li Zhi
Su Zhenzhong
Hu Jinghua
Li Wenyin
Cite this article:   
Li Zhi,Su Zhenzhong,Hu Jinghua等. Design and Experimental Research of Magnetic Bearing Compound Displacement Sensor[J]. Transactions of China Electrotechnical Society, 2021, 36(7): 1425-1433.
URL:  
https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.201050     OR     https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I7/1425
Copyright © Transactions of China Electrotechnical Society
Supported by: Beijing Magtech