Comparative Analysis and Experimental Evaluation of 3-Level NPC and Cascaded H-Bridge Inverters for Electric Power Applications

Abstract

This research paper focuses on the implementation and testing of a three-phase, three-level cascaded H-bridge inverter. The inverter is tested on both a three-phase motor and a resistive load to evaluate its performance and efficiency. The paper also discusses the modulation algorithm used for the two types of inverters, namely the cascaded H-bridge and the multi-structure, using the dSPACE 1104 and Microlabbox. The implementation of the inverter is crucial for various applications, including renewable energy systems and electric vehicles. The testing on a three-phase motor provides insights into the inverter's ability to control the motor's speed and torque accurately. Additionally, the resistive load testing helps assess the inverter's performance under different load conditions. The modulation algorithm applied to the inverters plays a vital role in achieving optimal performance and reducing harmonic distortion. The dSPACE 1104 and Microlabbox are utilized as reliable platforms for implementing and evaluating the modulation algorithm. The results obtained from the testing and implementation of the inverter and modulation algorithm provide valuable information for future research and development in the field of power electronics.