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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Diversity Preservation International (MDPI)
2013
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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. |
format | Online Article Text |
id | pubmed-3715263 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Molecular Diversity Preservation International (MDPI) |
record_format | MEDLINE/PubMed |
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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