基于逆维捷曼效应的用于汽车EPS系统的转矩传感器

摘要

A new torque sensor based on Counter-Wiedemann effect of Fe-base amorphous alloy was discussed, and it can be used for automobile electronic power steering. The principle and structure of the sensor were presented. By making a torque measuring experiment, the effect of the exciting field intensity on measurement accuracy was analyzed, and the static characteristic and temperature drift no-loading of sensor were got. The experimental result shows the sensor's measurement precision is 1. 0% . In addition, the sensor's structure is simple and its operational reliability is superior. So it is feasible to apply it for the automobile electronic power steering.%对一种基于铁基非晶态软磁合金的逆维捷曼效应,可用于汽车EPS系统的新型转矩传感器进行了研究.介绍了传感器的结构和原理.通过试验,分析了激磁磁场强度对传感器测量精度的影响,得到了传感器的静态特性以及零点温度漂移指标.试验显示,文中研究的传感器测量精度能够达到1.0％,而且其结构简单,工作可靠,应用于汽车电动助力系统(EPS)是可行的.