磁悬浮轴承横向磁通传感器设计与分析  

Design and analysis of the transverse flux sensor of active magnetic bearing

作　　者：金超武[1] 叶周铖 周瑾[1] 徐园平[1] Jin Chaowu;Ye Zhoucheng;Zhou Jin;Xu Yuanping(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《仪器仪表学报》2023年第9期226-236,共11页Chinese Journal of Scientific Instrument

基　　金：航空发动机及燃气轮机基础科学中心项目(P2022-B-Ⅲ-004-001);国家自然科学基金面上项目(51875275,52275059)资助。

摘　　要：横向磁通传感器因结构紧凑和高检测精度在磁悬浮轴承系统中具有广阔的应用前景。随磁悬浮轴承技术的发展,对横向磁通传感器的检测性能提出了更高要求。为进一步提升横向磁通传感器的性能,满足磁悬浮转子高精度位移监测需求,本文针对灵敏度指标对传感器进行设计与分析。通过建立传感器的数学模型和电磁场有限元分析,研究了激励频率和线圈参数之间的关系。对传感器线圈匝数与灵敏度的相关性进行了数值研究,从检测转子的角度分析了趋肤效应对传感器灵敏度的影响。设计了传感器信号处理电路实现由位移信号到电压信号的转换,并搭建实验平台对传感器的输出特性进行测量。实验结果表明,当灵敏度为20 mV/μm、检测范围为±500μm时,传感器的线性度为0.69%,且具有良好的动态特性,适用于磁悬浮轴承系统的转子高精度径向位置检测。The transverse flux sensor is widely used in the magnetic bearing system due to its compact structure and high detection accuracy.With the development of magnetic bearing technology,higher requirements are put forward for the detection performance of the transverse flux sensor.To further improve the performance of the transverse flux sensor and meet the high-precision displacement monitoring requirements of the magnetic suspension rotor,this article designs and analyzes the sensor for the sensitivity index.By formulating the mathematical model of the sensor and the finite element analysis of the electromagnetic field,the relationship between the excitation frequency and the coil parameters is studied.The correlation between the number of turns of the sensor coil and the sensitivity is numerically studied.The influence of the skin effect on the sensitivity of the sensor is analyzed from the perspective of detecting the rotor.The sensor signal processing circuit is designed to realize the conversion from displacement signal to voltage signal,and an experimental platform is established to measure the output characteristics of the sensor.The experimental results show that when the sensitivity of the sensor is 20 mV/μm,the detection range is±500μm,and the linearity is 0.69%.It has good dynamic characteristics,which is suitable for high-precision radial position detection of the rotor of the magnetic bearing system.

关 键 词：横向磁通传感器 磁悬浮轴承系统 灵敏度 激励频率 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TH822[自动化与计算机技术—控制科学与工程]