【摘要】 线性可变差动变压器式位移传感器(LVDT)是广泛应用于闭环控制系统的位移测量装置,针对其普遍存在的线性度差和灵敏度不高的弊端,首次提出一种在远离初级线圈的次级线圈一侧添加两个关于初级线圈对称锥形导磁环的新结构。用ANSYS Maxwell建立LVDT的有限元模型,在Maxwell Circuit Editor中设计外部激励电路,进行瞬态磁场的仿真分析。结果表明,保持其他因素不变,只在远离初级线圈的次级线圈一侧添加两对称的导磁环能够很好的提高LVDT的线性度,灵敏度也相应提高,添加导磁环后的线性度是未添加的1.5倍。更多还原

【Abstract】 Linear variable differential transformer( LVDT) is a displacement measuring device which is used in closed-loop control system widely. In view of the disadvantages of its ubiquitous linearity and low sensitivity,first put forward a new structure that add one pairs of guide magnetic ring on the side of the secondary coil away from the primary coil. The finite element model of LVDT is established by ANSYS Maxwell,the external excitation circuit was designed in the Maxwell Circuit Editor,and the transient magnetic field simulation is analyzed. The results show that to keep other factors unchanged,adding one pairs of guide magnetic ring on the side of the secondary coil away from the primary coil can improve the linearity of LVDT,and the sensitivity is improved,and the linearity increased 1. 5 times when the guide magnetic ring is added.更多还原