Improving GMR current sensor measurements through hysteresis modeling

Author

Jedlicska, I. ; Weiss, R. ; Weigel, R.

Author_Institution

Corp. Technol., Siemens AG, Erlangen

fYear

2008

fDate

15-19 June 2008

Firstpage

4781

Lastpage

4785

Abstract

The measurement accuracy of GMR Current sensors suffers under the influence of hysteresis. For solving this problem, a hysteresis model has been implemented to keep track in real time of the sensor output signal. The model is a simplified version of the T(x) hysteresis model. Very good results have been achieved in comparing the software simulations and the real sensor characteristics. The model has been further implemented on a fixed-point Digital Signal Controller (DSC), connected to the sensor output. The linear output of the DSC confirmed the functioning of the model in the hardware implementation. An algorithm for eliminating error propagation during the measurements has been also developed.

Keywords

electric current measurement; giant magnetoresistance; magnetic hysteresis; magnetoresistance; GMR current sensor measurements; error propagation; fixed-point digital signal controller; hysteresis modeling; magnetoresistive effects; software simulations; Anisotropic magnetoresistance; Colossal magnetoresistance; Current measurement; Electromagnetic modeling; Giant magnetoresistance; Magnetic hysteresis; Magnetic sensors; Mathematical model; Physics; Tunneling magnetoresistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2008. PESC 2008. IEEE

Conference_Location

Rhodes

ISSN

0275-9306

Print_ISBN

978-1-4244-1667-7

Electronic_ISBN

0275-9306

Type

conf

DOI

10.1109/PESC.2008.4592728

Filename

4592728