A Novel Control Method to Improve Efficiency in Wide Output Voltage Range for Bidirectional Isolated Three-Phase AC/DC Converter Based on Matrix Converter

Abstract

In this paper, a control method is proposed for a bidirectional isolated three-phase AC/DC Dual Active Bridge (DAB) converter based on a matrix converter (MC) that realizes a wide output voltage range. The proposed method achieves the reduction of excessive high frequency link currents and soft switching with online calculation by changing two modulation methods according to the input and output voltage ratio. Moreover, the proposed method realizes higher efficiency in the expanded output voltage range with reduced online calculation burden. The feasibility and validity of the proposed method are verified by experimental demonstration.