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...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2013-06-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/13/6/8042 |
| _version_ | 1798005972272152576 |
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| author | Tin Yan Poon Ricky Wing Hong Lau Norman Chung Fai Tse |
| author_facet | Tin Yan Poon Ricky Wing Hong Lau Norman Chung Fai Tse |
| author_sort | Tin Yan Poon |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-11T12:48:36Z |
| format | Article |
| id | doaj.art-7052b30ea88141a69031831ebdce0602 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T12:48:36Z |
| publishDate | 2013-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-7052b30ea88141a69031831ebdce06022022-12-22T04:23:17ZengMDPI AGSensors1424-82202013-06-011368042805910.3390/s130608042Extending the GMR Current Measurement Range with a Counteracting Magnetic FieldTin Yan PoonRicky Wing Hong LauNorman Chung Fai TseTraditionally, 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.http://www.mdpi.com/1424-8220/13/6/8042giant magnetoresistancecurrent sensorlinearizationphysical sensormagnetic field sensorHelmholtz coil |
| spellingShingle | Tin Yan Poon Ricky Wing Hong Lau Norman Chung Fai Tse Extending the GMR Current Measurement Range with a Counteracting Magnetic Field Sensors giant magnetoresistance current sensor linearization physical sensor magnetic field sensor Helmholtz coil |
| 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 | giant magnetoresistance current sensor linearization physical sensor magnetic field sensor Helmholtz coil |
| url | http://www.mdpi.com/1424-8220/13/6/8042 |
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