TMR array with circular skeleton coil for high-current measurement
DC high current measurement is one of the important supporting technologies of the power system. As an emerging current sensing technology, tunnel magnetoresistance (TMR) has attracted more and more attention due to its advantages of high sensitivity and good linearity. But the TMR sensor is not sui...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484721006442 |
| _version_ | 1818980000022396928 |
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| author | Changxi Yue Jicheng Yu Hongda Zhang Siyuan Liang Lingjie Xu |
| author_facet | Changxi Yue Jicheng Yu Hongda Zhang Siyuan Liang Lingjie Xu |
| author_sort | Changxi Yue |
| collection | DOAJ |
| description | DC high current measurement is one of the important supporting technologies of the power system. As an emerging current sensing technology, tunnel magnetoresistance (TMR) has attracted more and more attention due to its advantages of high sensitivity and good linearity. But the TMR sensor is not suitable for high current measurement, and its accuracy can be further improved. Aiming at these problems, this paper proposes a TMR array with a circular skeleton coil for high current measurement. Eight TMR chips are evenly installed on the circular skeleton coil to measure the magnetic field generated by the primary current carrying conductor, and the output of the feedback amplifier generates a compensation current to the feedback winding to generate a compensation magnetic field, so that the magnetic flux in the sensor is almost zero. The circular structure can reduce measurement errors caused by wire offset and external interference. Since there is no iron core, the nonlinear errors are also avoided. Simultaneously, the feedback loop designed based on zero magnetic flux principle can reduce the hysteresis error and expand the measurement range, making the sensor suitable for DC high current measurement. This paper proposes a new TMR array current sensor model, builds a prototype and compares it with a closed-loop TMR current sensor with an iron core. Experimental results proved that the TMR array sensor’s DC measurement error could be lower than 0.01%, compared to 0.32% of the closed-loop current sensor. Moreover, the proposed current sensor consistently has higher measurement accuracy in the full range of primary current. |
| first_indexed | 2024-12-20T17:08:28Z |
| format | Article |
| id | doaj.art-5281447a1c5e44199cb3ffd97903c040 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-12-20T17:08:28Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-5281447a1c5e44199cb3ffd97903c0402022-12-21T19:32:12ZengElsevierEnergy Reports2352-48472021-11-017312319TMR array with circular skeleton coil for high-current measurementChangxi Yue0Jicheng Yu1Hongda Zhang2Siyuan Liang3Lingjie Xu4China Electric Power Research Institute, Wuhan, 430070, ChinaChina Electric Power Research Institute, Wuhan, 430070, China; Corresponding author.State Grid Zhejiang Marketing Service Center, Hangzhou, 330009, ChinaChina Electric Power Research Institute, Wuhan, 430070, ChinaState Grid Zhejiang Marketing Service Center, Hangzhou, 330009, ChinaDC high current measurement is one of the important supporting technologies of the power system. As an emerging current sensing technology, tunnel magnetoresistance (TMR) has attracted more and more attention due to its advantages of high sensitivity and good linearity. But the TMR sensor is not suitable for high current measurement, and its accuracy can be further improved. Aiming at these problems, this paper proposes a TMR array with a circular skeleton coil for high current measurement. Eight TMR chips are evenly installed on the circular skeleton coil to measure the magnetic field generated by the primary current carrying conductor, and the output of the feedback amplifier generates a compensation current to the feedback winding to generate a compensation magnetic field, so that the magnetic flux in the sensor is almost zero. The circular structure can reduce measurement errors caused by wire offset and external interference. Since there is no iron core, the nonlinear errors are also avoided. Simultaneously, the feedback loop designed based on zero magnetic flux principle can reduce the hysteresis error and expand the measurement range, making the sensor suitable for DC high current measurement. This paper proposes a new TMR array current sensor model, builds a prototype and compares it with a closed-loop TMR current sensor with an iron core. Experimental results proved that the TMR array sensor’s DC measurement error could be lower than 0.01%, compared to 0.32% of the closed-loop current sensor. Moreover, the proposed current sensor consistently has higher measurement accuracy in the full range of primary current.http://www.sciencedirect.com/science/article/pii/S2352484721006442Tunnel magnetoresistanceCurrent sensorCircular arraySkeleton coil |
| spellingShingle | Changxi Yue Jicheng Yu Hongda Zhang Siyuan Liang Lingjie Xu TMR array with circular skeleton coil for high-current measurement Energy Reports Tunnel magnetoresistance Current sensor Circular array Skeleton coil |
| title | TMR array with circular skeleton coil for high-current measurement |
| title_full | TMR array with circular skeleton coil for high-current measurement |
| title_fullStr | TMR array with circular skeleton coil for high-current measurement |
| title_full_unstemmed | TMR array with circular skeleton coil for high-current measurement |
| title_short | TMR array with circular skeleton coil for high-current measurement |
| title_sort | tmr array with circular skeleton coil for high current measurement |
| topic | Tunnel magnetoresistance Current sensor Circular array Skeleton coil |
| url | http://www.sciencedirect.com/science/article/pii/S2352484721006442 |
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