earticle

영어

This paper presents a motor drive system based on Cascaded H-bridge (CHB) multilevel converter using only one isolated power source supply. CHB multilevel converter has been conceived as an effective device to reduce total harmonic distortion (THD) in medium-voltage motor drives. A new permanent-magnet synchronous motor (PMSM) drive system topology is proposed to implement the system harmonic compensation. In this novel system an transformer is used as energy feedback device between the converter and the motor; whereby the PMSM drive system using the feedback power flow to provide the H-bridges, Moreover, CHB multilevel converter take advantages in reduce total harmonic distortion since the transformer is connected in main circuit. Simulation and experimental results are provided to demonstrate the effectiveness of the proposed motor drive system.