Gui-Fang Li;Chuhan Gao;Yongqian Du;Dejiang Li;Feiyang Peng;Siyu Men;Yue Tan;Shibin Liu
{"title":"一种消除地磁影响的无磁环TMR电流传感器用于非接触电流检测","authors":"Gui-Fang Li;Chuhan Gao;Yongqian Du;Dejiang Li;Feiyang Peng;Siyu Men;Yue Tan;Shibin Liu","doi":"10.1109/JSEN.2024.3520384","DOIUrl":null,"url":null,"abstract":"In compact power electronic devices, magnetic-ring-free current sensors are increasingly preferred due to their compact size and lightweight nature. However, in high-precision small current measurements, the geomagnetic field can introduce substantial errors. To address this issue, a sensor chip using a bridge structure composed of four highly sensitive tunnel magnetoresistance (TMR) elements was employed, and a novel magnetic-ring-free current sensor was designed that eliminates geomagnetic field interference, thereby achieving precise small current measurements. This sensor operates in a zero-magnetic-flux state for the geomagnetic field, where the geomagnetic signal is fed back through a feedback coil, effectively canceling the geomagnetic field with the magnetic field generated in the feedback coil. This design enables the current sensor to achieve high-precision measurements. The experimental results showed that the current sensor achieved a sensitivity of 3.808 V/A and a measurement accuracy of ±1.854% within a sensing range of ±1.8 A. These findings offer a novel design strategy for future current sensors.","PeriodicalId":447,"journal":{"name":"IEEE Sensors Journal","volume":"25 3","pages":"4448-4455"},"PeriodicalIF":4.3000,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A Magnetic-Ring-Free TMR Current Sensor Eliminating Geomagnetic Influence for Noncontact Current Detection\",\"authors\":\"Gui-Fang Li;Chuhan Gao;Yongqian Du;Dejiang Li;Feiyang Peng;Siyu Men;Yue Tan;Shibin Liu\",\"doi\":\"10.1109/JSEN.2024.3520384\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In compact power electronic devices, magnetic-ring-free current sensors are increasingly preferred due to their compact size and lightweight nature. However, in high-precision small current measurements, the geomagnetic field can introduce substantial errors. To address this issue, a sensor chip using a bridge structure composed of four highly sensitive tunnel magnetoresistance (TMR) elements was employed, and a novel magnetic-ring-free current sensor was designed that eliminates geomagnetic field interference, thereby achieving precise small current measurements. This sensor operates in a zero-magnetic-flux state for the geomagnetic field, where the geomagnetic signal is fed back through a feedback coil, effectively canceling the geomagnetic field with the magnetic field generated in the feedback coil. This design enables the current sensor to achieve high-precision measurements. The experimental results showed that the current sensor achieved a sensitivity of 3.808 V/A and a measurement accuracy of ±1.854% within a sensing range of ±1.8 A. These findings offer a novel design strategy for future current sensors.\",\"PeriodicalId\":447,\"journal\":{\"name\":\"IEEE Sensors Journal\",\"volume\":\"25 3\",\"pages\":\"4448-4455\"},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2024-12-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Sensors Journal\",\"FirstCategoryId\":\"103\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/10816338/\",\"RegionNum\":2,\"RegionCategory\":\"综合性期刊\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Sensors Journal","FirstCategoryId":"103","ListUrlMain":"https://ieeexplore.ieee.org/document/10816338/","RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
A Magnetic-Ring-Free TMR Current Sensor Eliminating Geomagnetic Influence for Noncontact Current Detection
In compact power electronic devices, magnetic-ring-free current sensors are increasingly preferred due to their compact size and lightweight nature. However, in high-precision small current measurements, the geomagnetic field can introduce substantial errors. To address this issue, a sensor chip using a bridge structure composed of four highly sensitive tunnel magnetoresistance (TMR) elements was employed, and a novel magnetic-ring-free current sensor was designed that eliminates geomagnetic field interference, thereby achieving precise small current measurements. This sensor operates in a zero-magnetic-flux state for the geomagnetic field, where the geomagnetic signal is fed back through a feedback coil, effectively canceling the geomagnetic field with the magnetic field generated in the feedback coil. This design enables the current sensor to achieve high-precision measurements. The experimental results showed that the current sensor achieved a sensitivity of 3.808 V/A and a measurement accuracy of ±1.854% within a sensing range of ±1.8 A. These findings offer a novel design strategy for future current sensors.
期刊介绍:
The fields of interest of the IEEE Sensors Journal are the theory, design , fabrication, manufacturing and applications of devices for sensing and transducing physical, chemical and biological phenomena, with emphasis on the electronics and physics aspect of sensors and integrated sensors-actuators. IEEE Sensors Journal deals with the following:
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-Sensors in Industrial Practice