Experimental thermal characterisation of an ironless inductive position sensor

This article reports an experimental study performed on the ironless inductive position sensor tounderstand the relationship between changes in the surrounding temperature and positionreading of the novel linear position sensor. The measured variation of the basic electrical com-ponents with temperature is presented and shows that the position drift of the sensor varies withthe state of the sensor. The states include the moving coil position, and the frequency of op-eration. The results also reveal that the resistance and inductance changes happen in all the coils.Furthermore, the results show that when subjected to an even temperature change, the movingcoil contributes to the highest change. In addition, uneven thermal distribution along the body ofthe sensor leads to high sensitivity from the sense coils. The results also indicate that the in-ductance change is small and leads to a small position change.