磁轴承复合位移传感设计与实验研究

doi:10.19595/j.cnki.1000-6753.tces.201050

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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 words： Magnetic bearing displacement measurement sensor detection coil

Received: 19 August 2020

PACS:

TM722.7

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	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.

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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

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