A Theoretical Footing for Design Methodology and Practical Implementation of the Three-Phase Three-Level Rectifiers

This paper presents a theoretical footing for analysis of the characteristics of three-phase three-level rectifiers. The proposed control strategy and structure of switches are based on the prototype of three bi-directional switches consisted of four diodes and one IGBT device. Much of attention in this paper is focused on the three-phase three-level rectifier implementation with the input and load characteristics under theoretical footing. The detailed methodology is explained clearly in this paper. The simulation results and experimental results fully verify the theoretical analysis that leads to significant overall efficiency.