混合型光学电流互感器的集磁环传感头

Ferromagnetic ring concentrator sensor head of hybrid optical current transformer

光学电流互感器OCT(OpticalCurrentTransformer)相对于传统电磁式电流互感器有着许多优点。对混合型OCT的集磁环式传感头的磁环进行理论分析,以安培环路定理和铁磁物质磁化曲线为基础,分析了带气隙磁环的磁化曲线,通过消除剩磁密度对铁芯的影响计算磁环和气隙尺寸;根据有关资料和试验结果得出结论,给出混合型OCT集磁环的横截面面积、平均半径和气隙长度。

Compared with traditional electromagnetic current transformer,OCT(Optical Current Trans- former)has many virtues. The ferromagnetic ring concentrator sensor head of hybrid OCT is theo -retically analyzed. The magnetization curve of ferromagnetic ring with air gap is analyzed based on the Ampere loop theorem and magnetization curves of ferromagnetic matter,and the sizes of ferromagnetic ring and air gap are obtained by eliminating the effect of remanent flux density on the iron core. According to relevant documents and experimental results,the across section and average radius of ferromagnetic ring concentrator and gap length of hybrid OCT are offered.