Title :
Improving GMR current sensor measurements through hysteresis modeling
Author :
Jedlicska, I. ; Weiss, R. ; Weigel, R.
Author_Institution :
Corp. Technol., Siemens AG, Erlangen
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;
Conference_Titel :
Power Electronics Specialists Conference, 2008. PESC 2008. IEEE
Conference_Location :
Rhodes
Print_ISBN :
978-1-4244-1667-7
Electronic_ISBN :
0275-9306
DOI :
10.1109/PESC.2008.4592728
