The measurement accuracy of common current sensor is only 3 %

5

% and it is difficult to meet the needs of high-precision measurement.Through the error analysis of current sensor

the electronic circuit is added to the common current sensor to track the magnetizing current of iron core and compensate it dynamically

so that the iron core can achieve "zero flux" state.The working principle of current sensor by adding electronic compensation circuit

the structure of electronic circuit and the selection method of parameters in circuit are analyzed.The material and structure of iron core and shielding method of current sensor are also analyzed.The performance test shows that the accuracy of current sensor is improved and the compensation effect is good.