建模和优化设计高速磁悬浮列车的相对位置检测传感器

建模和优化设计高速磁悬浮列车的相对位置检测传感器(中文3300字,英文2800字)
摘要：
高速磁悬浮列车的长定子轨道有一个特殊的齿槽结构。相对位置检测传感
器是通过检测线圈电感的变化反映长定子齿槽结构从而获得精确的相对位置信
息的操作控制系统。由于铝绕组镶嵌在定子槽中,和传感器线圈的磁场产生涡流,
这将改变磁场分布并且对传感器产生重大的影响。本文采用多极理论(MT)构建
分析电磁传感器的模型。基于电磁模型,对涡流影响引起的绕组线圈电感进行了
研究。由于轻微的电感线圈的区别通过直流偏置公式而推导出差动电压。然后
对直流偏置的涡流的影响进行了分析,在此基础上,提出了空载电压补偿的方法
和最优传感器励磁频率改善传感器的准确性。Relative

Modeling and optimal design of relative position
detection sensor for high speed maglev train
a b s t r a c t
The long stator track for high speed maglev train has a special
tooth-slot structure. The relative position detection sensor obtains
precise relative position information for the operation control
system by detecting the changing coil inductance reflecting the long
 
stator tooth-slot structure. The aluminum windings are inlaid in the
stator slots, and the magnetic field due to the sensor coils induces
eddy current in them, which would change the magnetic field
distribution and have a significant influence on the sensor. In this
paper, the multipole theory (MT) is adopted to build the analytical
electromagnetic model of the sensor. Based on the electromagnetic
model, the influence of the eddy current induced in the windings on
the coil inductance is studied. The DC offset formula of differential
voltage owing to the slight inductance difference of the coils is
derived. The influence of the eddy current on the DC offset is
analyzed, based on which, a method of no-load voltage compensation
and an optimal sensor excitation frequency is proposed to improve the
accuracy of the sensor.