一种基于泡克尔斯效应的光学电流传感方法

An Optical Current Transducer Based on Pockels Effect

利用空芯电流互感器和电光晶体实现了工频电流的光学传感与测量，对工频电流一电压变换方法和二次电压的光学传感进行了理论与实验研究．结果表明，这种方法具有线性和同相位传感特性，并能够有效地避免铁芯电流互感器存在的波形失真及磁饱和问题．对０～１０ Ａ 工频电流传感实验结果的非线性误差低于 １．３％．

An optical method is developed for measuring AC based on an air-core current transducer and an electro-optic crystal. The theoretical and experimental researches on this method include converting an unknown current into a voltage and sensing the voltage by an electro-optic crystal with Pockels effect. This method has the properties of the inphase and linear measurement. Compared with the iron-core current transducer, the aircore current transducer can avoid the distortion of the measured current signal and the magnetic saturation. Within the scope of 10 A, the non linearity error of measuring AC by the method is less than 1. 3%.