Current Sensor for Laminated Bus Bar

Abstract

This letter describes a current sensor embedded in a laminated bus bar. The proposed sensor is based on the Rogowski coil principle, and it can detect the magnetic flux that corresponds to a derivative waveform of the current inside the bus bar. The current sensor for the laminated bus bar has been used in a buck converter circuit. The experimental results confirmed that the proposed current sensor can measure switching waveforms without any propagation delay.