恒磁通磁轴承轴向电感位移传感器参数研究  

Parameters Characteristics of Axial Inductive Displacement Sensors with Constant Flux for Magnetic Bearings

作　　者：王纯一 徐旸[1] 张剀[1] WANG Chunyi;XU Yang;ZHANG Kai(Department of Engineering Physics,Tsinghua University Beijing,100084,China)

机构地区：[1]清华大学工程物理系,北京100084

出　　处：《振动．测试与诊断》2023年第6期1095-1102,1242,共9页Journal of Vibration,Measurement & Diagnosis

基　　金：国家重点研发计划资助项目(2018YFB2000100);国家自然科学基金资助项目(51775292)。

摘　　要：恒磁通轴向电感位移传感器可有效抵抗外磁场干扰,但灵敏度较低。为提升其灵敏度,针对该传感器新式拓扑结构和测量原理,推导了灵敏度与机械参数和电气参数的关系式,给出了提升灵敏度的方法。理论和实验表明:平衡气隙越小,传感器灵敏度越高,且灵敏度与气隙大小近似成反比;激励频率、传感器激励线圈消耗的视在功率越大,灵敏度越高,且灵敏度与两者的算术平方根均成正比。通过减小气隙大小、增大激励频率及提高传感器视在功率,可以提升此传感器的灵敏度,并给出了在功率放大器输出能力范围内最大化传感器灵敏度的参数设计方法。Axial inductive displacement sensors with constant flux for magnetic bearings can effectively resist the interference of external magnetic field,but its sensitivity is low.In order to improve its sensitivity,the relationship between the sensitivity and mechanical and electrical parameters is derived according to the new topology and measurement principle of the sensor.The methods are given to improve the sensitivity.Theoretical and experimental results show that the smaller the balance air gap is,the higher the sensitivity of the sensor is,and the sensitivity is approximately and inversely proportional to the size of the air gap.Moreover,the higher the excitation frequency and the apparent power consumed by excitation coils of the sensor,the higher the sensitivity is,and the sensitivity is proportional to their square root.Therefore,the sensitivity of the sensor can be im‑proved by reducing the air gap,increasing the excitation frequency,and increasing the apparent power of the sensor.Based on this,the parameter design methods are proposed to maximize the sensitivity of the sensor within the output capacity of power amplifiers.

关 键 词：磁轴承 电感传感器 灵敏度 恒磁通 抗干扰 

分 类 号：TP212.1[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]