闭环霍尔电压传感器增益温漂补偿技术

闭环霍尔电压传感器作为一种低成本、高可靠的电压测量器件,在轨道交通和工业控制领域应用广泛。其原边线圈由漆包线绕制,匝数为数万匝,原边线圈阻值的温度漂移造成传感器的增益温漂和全温度范围精度的下降。为了提高传感器全温度范围的精度,文章基于原边线圈阻值温漂特性提出了一种新型温度补偿电路,应用仿真工具,结合闭环霍尔电压传感器进行了理论计算和分析,将计算结果与试验测试数据进行对比,证明经过该补偿电路的补偿,闭环霍尔电压传感器的增益温漂得到了明显的改善,从而将闭环霍尔电压传感器的全温度范围精度提高0.9个百分点。该项技术弥补了闭环霍尔电压传感器增益温漂短板,使其具备应用于能耗记录等高精度应用领域的条件。

Compensation of Closed-loop Voltage Sensors' Gain Drift

As a low-cost,high-reliability voltage measure device,closed-loop voltage sensors were used in rail transit and industrial control fields.The primary coil was wound by enameled wire,and the number of turns was ten thousands.The temperature drift of the resistor of the primary coil caused the gain temperature drift and the decrease of the accuracy of the full temperature range.In order to improve the accuracy of the full temperature range,the paper built a new temperature compensation circuit,and used it to calculate and analysis the closed loop voltage sensors'gain drift,and compared the calculated result with experimental data to prove that the compensation circuit has improved the gain drift and improved the full temperature range accuracy of the closedloop voltage sensors by 0.9%.The technology made up for the short board of the closed-loop voltage sensors'gain drift,making it suitable for use in high-precision applications such as energy consumption recording.