2021 article

An Improved PWM Method for Minimum Common-Mode Circulating Current Operation of Six Phase Three Level Inverter

2021 THIRTY-SIXTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2021), pp. 1070–1077.

By: P. Das n, S. Satpathy n & S. Bhattacharya n 

co-author countries: United States of America πŸ‡ΊπŸ‡Έ
author keywords: PWM; Common-Mode Voltage; Third Harmonics Injection
Source: Web Of Science
Added: September 20, 2021

This paper presents a simple Pulse Width Modulation (PWM) technique to reduce the common-mode circulating current of a six-phase three-level inverter. Six-phase inverters generally suffer high common-mode circulating current when space vector PWM (SVPWM) or min-max method is used with a common neutral point. For common-mode circulating current reduction, Phase Disposition (PD) PWM with a compromised third harmonics injection method is proposed in this work. The selected third harmonics injection method removes the low-frequency common-mode circulating current. The absence of low frequency circulating current improves the THD of the load currents. Finally, the proposed method is tested in PLECS simulation with a 75KW system, and results are presented here.