Inductive Positions Sensors: Fundamentals and Applications by Dipl.-HTL-Ing. Josef Janisch

Abstract:
"Contactless position sensors can be found in a wide range of automotive, industrial, medical and consumer applications. From high speed sensors in electric motors or vehicle wheel speed sensors to precise position sensors for robot arms, steering wheels, pedals, valves, actuators, and so forth. While the majority of these sensors used to be based on magnetic, optical or resolver technologies, there is a growing need for position sensors based on inductive technology due to their low overall cost and inherent robustness towards unwanted magnetic stray fields. Another beneficial feature is their flexibility in adapting them to the mechanical needs of the application, as the actual sensing element is a simple set of coils printed on a PCB, designed and shaped by the user. This workshop describes the physical fundamentals behind the inductive position sensing technology, followed by the electrical implementation in building a robust contactless position sensor on chip level. It outlines the design requirements for the printed sensor coils and an overview of the applications that can be utilized with this technology. Life demos of inductive position sensor applications allow the students to see and experiment with inductive position sensors in operation."
This presentation was recorded as part of the lecture "Selected Topics of Advanced Analog Chip Design" from the Institute of Electronics at TU Graz.
Special thanks to Dipl.-HTL-Ing. Josef Janisch, for the insightful presentation.
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