DocumentCode :
2687665
Title :
An analytical model of the effect of external DC magnetic fields on the AC voltages of an LVDT
Author :
Martino, Michele ; Golluccio, Giancarlo ; Losito, Roberto ; Masi, Alessandro
Author_Institution :
Dipt. di Ing. Elettr., Univ. di Napoli Federico II, Naples, Italy
fYear :
2010
fDate :
3-6 May 2010
Firstpage :
213
Lastpage :
218
Abstract :
An analytical model to describe the effects of an external DC magnetic field on the harmonics amplitude of the secondary voltages of a Linear Variable Differential Transformer LVDT is proposed. A very general approach is used based on the introduction of the equivalent differential permeability concept that takes into account the sensor´s geometry as well as the magnetic properties of its materials. The focus is mainly on the nonlinearity of the material of the LVDT´s core since it is the material with the highest permeability. The proposed model is finally validated by means of measurements performed on a prototype explicitly built for that purpose.
Keywords :
differential transformers; inductive sensors; magnetic field measurement; magnetic permeability; AC voltages; LVDT; equivalent differential permeability concept; external DC magnetic fields; harmonics amplitude; linear variable differential transformer; Analytical models; Geometry; Magnetic cores; Magnetic materials; Magnetic properties; Performance evaluation; Permeability; Prototypes; Transformer cores; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2010 IEEE
Conference_Location :
Austin, TX
ISSN :
1091-5281
Print_ISBN :
978-1-4244-2832-8
Electronic_ISBN :
1091-5281
Type :
conf
DOI :
10.1109/IMTC.2010.5488116
Filename :
5488116
Link To Document :
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