Electromagnetic model of an ironless inductive position sensor

Author

Danisi, Alessandro ; Masi, Alessandro ; Losito, Roberto ; Perriard, Yves

Author_Institution

EN/STI Group, Eur. Organ. for Nucl. Res. (CERN), Geneva, Switzerland

fYear

2012

fDate

13-16 May 2012

Firstpage

69

Lastpage

74

Abstract

An ironless position sensor is a novel sensing structure which exhibits intrinsic immunity to external magnetic fields, since it is characterized by air-cored supply and sensing windings. This new solution may be of significant interest for applications where external magnetic fields are present. In this paper, an analytical model of the working principle of the sensor is proposed. The effect of the moving coil flux on the overall sensed magnetic flux is described. The modeling of such a sensor acts as a design tool of primary importance in the framework of the synthesis of the device. The model is verified by simulations of a finite element structure of the sensor, expressly prepared for this purpose.

Keywords

coils; finite element analysis; inductive sensors; magnetic flux; position measurement; air-cored supply; coil magnetic flux; electromagnetic model; external magnetic fields; finite element structure; ironless inductive position sensor; sensing structure; sensing windings; Coils; Current supplies; Finite element methods; Inductance; Magnetic fields; Magnetic flux; Windings; Air-cored coils; Electromagnetic Modeling; Ironless Position Sensor; LVDT; Linear Position Sensing; Mutual Inductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International

Conference_Location

Graz

ISSN

1091-5281

Print_ISBN

978-1-4577-1773-4

Type

conf

DOI

10.1109/I2MTC.2012.6229528

Filename

6229528