基于霍尔效应的感应式瞬时旋转角速度传感器

设计了一种基于霍尔效应的感应式瞬时旋转角速度传感器,主要包括定子铁心及绕组、霍尔元件和永磁转子3大部分,且永磁转子的磁通在空间气隙中呈正弦规律分布。传感器工作时,永磁转子与被测旋转设备同轴连接,永磁转子的磁场与定子绕组匝链耦合,绕组中产生与瞬时旋转角速度呈对应关系的感应电动势。由于定子绕组与霍尔元件的控制端直接连接,则霍尔元件中存在电流,在永磁转子磁场的作用下,霍尔元件产生与瞬时旋转角速度成正比的直流霍尔电势。推导了传感器的输出特性,并对传感器进行了特性测定实验,结果表明其灵敏度系数约为203 mV/(rad·s^-1),线性误差约为0.5%。

A Inductive Instantaneous Rotation Angular Rate Sensor Based on Hall Effect

A inductive instantaneous rotation angular rate sensor based on Hall effect is presented, the sensor is mainly composed three parts, including stator core and winding, Hall element and permanent magnet rotor, the flux distribution of permanent magnet rotor in the air gap is sine regularity. The permanent magnet rotor is connected to the test device coaxially when at work, and the magnetic field of permanent magnet rotor is coupling with the stator winding, then the induction electromotive force in stator windings is generated, which is corresponding to the instantaneous rotation angular velocity. For the stator winding is directly connected with the control terminals of the Hall element, the current in Hall element is produced, and the DC Hall potential is generated under the effect of magnetic field of permanent magnet rotor, which is proportional to the instantaneous rotation angular velocity. The output characteristic of sensor is deduced, and the determination testing is carried out, the results show that the sensitivity coefficient of sensor is about 203 mV/(rad·s-1) , and the linear error is about 0.5%.