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Improvement of Hall effect current transducer metrological performances in the presence of harmonic distortion (Articolo in rivista)

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Improvement of Hall effect current transducer metrological performances in the presence of harmonic distortion (Articolo in rivista) (literal)

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A. Cataliotti, D. Di Cara, A. E. Emanuel, S. Nuccio, (2010)
Improvement of Hall effect current transducer metrological performances in the presence of harmonic distortion
in IEEE transactions on instrumentation and measurement
(literal)

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Department of Electrical, Electronic and Telecommunication Engineering, University of Palermo, 90128 Palermo, Italy; National Research Council-Institute of Intelligent System for Automation, 90141 Palermo, Italy; Department of Electrical and Computer Engineering, Worcester Polytechnic Institute, Worcester, MA 01609-2280, United States (literal)

Titolo

Improvement of Hall effect current transducer metrological performances in the presence of harmonic distortion (literal)

Abstract

The performance of Hall effect current transducers (HECTs), under distorted waveform conditions, is usually characterized by means of a frequency response test. In this paper, it was investigated if frequency response is able to correctly evaluate the ratio and the phase errors under distorted conditions. Two HECTs, with the accuracy class level of 1% and 0.5%, respectively, were experimentally characterized under two conditions: 1) sinusoidal excitation with frequencies ranging from 50 to 750 Hz, which is the well-known frequency response test, and 2) nonsinusoidal excitation using fundamental frequency and one harmonic with adjusted amplitude and phase shift. It was found that ratio and phase errors are weakly affected by the harmonic amplitude and phase shift, with respect to the fundamental in the accuracy level of 0.1% and 0.05°. They have, instead, a strong dependence from conductor location in the HECT window. These results suggest that the frequency response approach for the evaluation of HECT performance, under distorted waveform conditions, can be used for an error compensation method only if the position of the primary conductor is known. An error compensation method, based on the frequency response, was implemented and tested with a distorted waveform composed of fundamental and many harmonics. For each of the harmonic components, the errors were reduced to one tenth of the measured ones. © 2006 IEEE. (literal)

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