Design and Experimental Research of Magnetic Bearing Compound Displacement Sensor

被引：0

作者：

Li Z. ^{[1
]}

Su Z. ^{[1
]}

Hu J. ^{[1
]}

Li W. ^{[1
]}

机构：

[1] National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan

来源：

Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2021年 / 36卷 / 07期

关键词：

Detection coil; Displacement measurement; Magnetic bearing; Sensor;

D O I：

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

中图分类号：

学科分类号：

摘要：

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. © 2021, Electrical Technology Press Co. Ltd. All right reserved.

引用

页码：1425 / 1433

页数：8