混合式光电电流互感器中Rogowski线圈传感头设计

Design of Rogowski coil sensor head for hybrid optical current transducer

针对传统电流互感器易饱和﹑绝缘复杂等缺点,介绍了一种混合式光电电流互感器传感头用于测量的新型空心电流互感器。空心线圈传感头(Rogowski线圈传感头)是由金属导线均匀密绕在一无磁性的骨架上做成的。它具有无磁饱和﹑绝缘方法简单﹑测量范围宽等优点。空心线圈传感头由于其感应机理和结构的原因,容易受到外界磁场和温度变化的影响。针对干扰磁场采取了屏蔽等措施,从材料和元器件选择上解决了温度的影响。并试做了一个传感头,试验结果表明,该传感头效果良好,达到了0.2%的精度。

To avoid shortcomings of conventional current transducers in insulation and saturation, the hybrid optical sensor head of a new type air core current transducer is presented. The Rogowski coil is winding uniformly and closely on a non-magnetic frame, being of easy insulation, non -saturation and large measuring range. Because of its sensing principle and structure,the air core coil is sensitively affected by the field magnetic disturbance and temperature. Anti- interference measures are taken and special materials and components are selected to solve problems. A prototype is made and the experiment result is analyzed. The performance is perfect,and the accuracy is within class 0.2 %.