Title :
A multi-carrier PWM for parallel three-phase active front-end converters
Author :
Hou, Chung-Chuan
Author_Institution :
Chung Hua Univ., Hsinchu, Taiwan
Abstract :
The use of parallel three-phase active front-end converters has become more popular due to simplicity, low cost and expandability. However, the pulse width modulation (PWM) switching of parallel three-phase active front-end converters causes circulating current. The circulating current is mainly affected by the zero vectors of each PWM cycle. This study proposed a multi-carrier PWM for parallel three-phase active front-end converters. The multi-carrier PWM can synthesize the desired output voltage without using zero vectors. Therefore, the circulating current between parallel three-phase active front-end converters will be suppressed by the multi-carrier PWM scheme. Furthermore, the common mode voltage of three-phase active front-end converter is reduced by the multi-carrier PWM scheme. Simulation and test results are presented to validate the performances of the proposed multi-carrier PWM for parallel three-phase active front-end converters.
Keywords :
PWM power convertors; switching convertors; zero current switching; circulating current; common mode voltage; multicarrier PWM; parallel three-phase active front-end converters; parallel three-phase converters; pulse width modulation switching; zero vectors; Regulators; Space vector pulse width modulation; Switches; Vectors; Voltage control; Voltage measurement; active front-end converters; circulating current; multi-carrier PWM;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2011 IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
978-1-4577-0542-7
DOI :
10.1109/ECCE.2011.6064324
