Novel giant magnetostrictive material current sensor

2015 Global Conference on Polymer and Composite Materials

材料科学;化学

Shen, Yan^1 ; Liu, Zhao^1 ; Lin, Qiuyan^1 ; Ge, Jinming^1 ; Zhang, Guoqing^1 ; Yu, Wenbin^1

Department of Electrical Engineering, Harbin Institute of Technology, Harbin

150080, China^1

关键词: Bias magnetic field;    Device sensitivity;    Giant magnetostrictive materials;    Inductive current;    Magnetic field interference;    Monitor and control;    Operating principles;    Optical current sensor;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/87/1/012089/pdf
DOI  :  10.1088/1757-899X/87/1/012089

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Because of the shortcomings of the traditional inductive current sensor and optical current sensor, this paper proposes a new type of current sensor that uses a giant magnetostrictive material (GMM) to monitor and control power lines. This paper introduces operating principle and structure design of a GMM current sensor. To eliminate the frequency- doubled effect and to obtain good linearity, we set the bias magnetic field to 11.53 kA/m and the prestress force to 6 MPa. The strains of the 100- and 200-mm GMM sticks under the same magnetic field were compared; the results showed that the 100-mm stick had a larger strain. The magnetic field interference during a single-phase measurement of power lines was also studied. Finally, we analyzed the device sensitivity and discussed its influencing factors. The sensitivity reached 4 × 10-9m2/A.