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電流傳感器

霍爾電流傳感器的工作原理

發布日期：2022-10-09 點擊率：65

　　電流傳感器可以測量各種類型的電流，從直流電到幾十千赫茲的交流電，其所依據的工作原理主要是霍爾效應原理。

　　當原邊導線經過電流傳感器時，原邊電流IP會產生磁力線，原邊磁力線集中在磁芯氣隙周圍，內置在磁芯氣隙中的霍爾電片可產生和原邊磁力線成正比的，大小僅為幾毫伏的感應電壓，通過后續電子電路可把這個微小的信號轉變成副邊電流IS，并存在以下關系式： IS* NS= IP*NP

　　其中，IS—副邊電流；

　　IP—原邊電流；

　　NP—原邊線圈匝數；

　　NS—副邊線圈匝數；

　　NP/NS—匝數比，一般取NP=1。

 

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