Detecting Three-Phase Power Inverter Output Currents By A Single PCB Current Sensor

Conference: CIPS 2020 - 11th International Conference on Integrated Power Electronics Systems
03/24/2020 - 03/26/2020 at Berlin, Deutschland

Proceedings: ETG-Fb. 161: CIPS 2020

Pages: 4Language: englishTyp: PDF

Bat-Ochir, Bat-Otgon (National University of Mongolia & Kyushu Institute of Technology, Japan)
Bayarkhuu, Battuvshin; Dugarjav, Bayasgalan (National University of Mongolia)
Tsukuda, Masanori; Omura, Ichiro (Kyushu Institute of Technology, Japan)

Measuring the current of a power conversion system is imperative. So, we have developed a new method of measuring a three-phase inverter’s currents of all loads with a single current sensor. We successfully tested this method on a computer simulation and an experimental setup. Which showed that the method can be integrated into power inverters. We proposed an inexpensive analog circuit suitable for capturing current information from a tiny PCB Rogowski coil. It measures the current of the power inverter’s DC supply line and resynthesizes all load currents separately. This way it will reduce the size and cost of a power conversion system’s current measuring devices.