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Extending the GMR Current Measurement Range with a Counteracting Magnetic Field

Traditionally, current transformers are often used for current measurement in low voltage (LV) electrical networks. They have a large physical size and are not designed for use with power electronic circuits. Semiconductor-based current sensing devices such as the Hall sensor and Giant Magnetoresist...

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Detalles Bibliográficos
Autores principales: Poon, Tin Yan, Tse, Norman Chung Fai, Lau, Ricky Wing Hong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3715263/
https://www.ncbi.nlm.nih.gov/pubmed/23793022
http://dx.doi.org/10.3390/s130608042
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author Poon, Tin Yan
Tse, Norman Chung Fai
Lau, Ricky Wing Hong
author_facet Poon, Tin Yan
Tse, Norman Chung Fai
Lau, Ricky Wing Hong
author_sort Poon, Tin Yan
collection PubMed
description Traditionally, current transformers are often used for current measurement in low voltage (LV) electrical networks. They have a large physical size and are not designed for use with power electronic circuits. Semiconductor-based current sensing devices such as the Hall sensor and Giant Magnetoresistive (GMR) sensor are advantageous in terms of small size, high sensitivity, wide frequency range, low power consumption, and relatively low cost. Nevertheless, the operational characteristics of these devices limit their current measurement range. In this paper, a design based on using counteracting magnetic field is introduced for extending the GMR current measurement range from 9 A (unipolar) to ±45 A. A prototype has been implemented to verify the design and the linear operation of the circuit is demonstrated by experimental results. A microcontroller unit (MCU) is used to provide an automatic scaling function to optimize the performance of the proposed current sensor.
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spelling pubmed-37152632013-07-24 Extending the GMR Current Measurement Range with a Counteracting Magnetic Field Poon, Tin Yan Tse, Norman Chung Fai Lau, Ricky Wing Hong Sensors (Basel) Article Traditionally, current transformers are often used for current measurement in low voltage (LV) electrical networks. They have a large physical size and are not designed for use with power electronic circuits. Semiconductor-based current sensing devices such as the Hall sensor and Giant Magnetoresistive (GMR) sensor are advantageous in terms of small size, high sensitivity, wide frequency range, low power consumption, and relatively low cost. Nevertheless, the operational characteristics of these devices limit their current measurement range. In this paper, a design based on using counteracting magnetic field is introduced for extending the GMR current measurement range from 9 A (unipolar) to ±45 A. A prototype has been implemented to verify the design and the linear operation of the circuit is demonstrated by experimental results. A microcontroller unit (MCU) is used to provide an automatic scaling function to optimize the performance of the proposed current sensor. Molecular Diversity Preservation International (MDPI) 2013-06-21 /pmc/articles/PMC3715263/ /pubmed/23793022 http://dx.doi.org/10.3390/s130608042 Text en © 2013 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Poon, Tin Yan
Tse, Norman Chung Fai
Lau, Ricky Wing Hong
Extending the GMR Current Measurement Range with a Counteracting Magnetic Field
title Extending the GMR Current Measurement Range with a Counteracting Magnetic Field
title_full Extending the GMR Current Measurement Range with a Counteracting Magnetic Field
title_fullStr Extending the GMR Current Measurement Range with a Counteracting Magnetic Field
title_full_unstemmed Extending the GMR Current Measurement Range with a Counteracting Magnetic Field
title_short Extending the GMR Current Measurement Range with a Counteracting Magnetic Field
title_sort extending the gmr current measurement range with a counteracting magnetic field
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3715263/
https://www.ncbi.nlm.nih.gov/pubmed/23793022
http://dx.doi.org/10.3390/s130608042
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