“Looking Through Walls” – Actuator Position Measurement Through a Conductive Wall
METADATA ONLY
Loading...
Author / Producer
Date
2020
Publication Type
Conference Paper
ETH Bibliography
yes
Citations
Altmetric
METADATA ONLY
Data
Rights / License
Abstract
This paper investigates the design of an Eddy Current Sensor (ECS) for position measurement of a moving conductive target located behind a fixed conductive shielding surface. Such a sensor can e.g. be used in completely sealed actuators with magnetically levitated rotor or mover for high purity applications. A detailed analysis of the sensor is conducted, starting from the conventional ECS and its equivalent circuit model, which is then further extended to an ECS looking through a conductive wall. With the aid of Finite Element Methods (FEM) simulations, a deeper understanding of the sensor operating principle is provided, together with guidelines to select its optimal excitation frequency, based on the properties of the selected materials for the target and the shielding surface. A sensitivity analysis is then conducted and the results are finally verified with measurements on a hardware sensor prototype, showing that the sensor can be used to capture the mover position in an active magnetic bearing control structure. © 2020 The Institute of Electrical Engineers of Japan.
Permanent link
Publication status
published
Editor
Book title
2020 23rd International Conference on Electrical Machines and Systems (ICEMS)
Journal / series
Volume
Pages / Article No.
1649 - 1654
Publisher
IEEE
Event
23rd International Conference on Electrical Machines and Systems (ICEMS 2020) (virtual)
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Organisational unit
03573 - Kolar, Johann W. (emeritus) / Kolar, Johann W. (emeritus)
Notes
Due to the Coronavirus (COVID-19) the conference was conducted virtually.