Design and Simulation of Rogowski Coil with Pulse Compound Integrator

This paper describes a Rogowski coil integrator for pulsed high current measurements. Based on the principle and equivalent model of Rogowski coil, this paper designs an impulse composite integrator that is compatible with the coil sensitivity, bandwidth and phase by comparing the shortcomings of the first-order RC integrator and the classical active integrator at the design stage. The integrator consists of a passive part and an active part. The passive part is used for mid-frequency integration, which reduces the gain of the coil. The active part is used for low-frequency integration, which has a lifting effect on the system gain. In addition to this, the overall sensitivity can be changed by adjusting the gain coefficient between the frequency band of the passive integrator and the active integrator. Finally, the circuit simulation was carried out using MULTISIM to verify the effectiveness of the integrator design.