期刊名称：International Journal on Electrical Engineering and Informatics
印刷版ISSN：2085-6830
出版年度：2015
卷号：7
期号：3
DOI：10.15676/ijeei.2015.7.3.1
出版社：School of Electrical Engineering and Informatics
摘要：The influence of injecting third harmonic signal into three-phase sinusoidalreference signal of natural sampled PWM technique on output current ripple and neutralcurrent of three-level inverter is analyzed in this paper. Expressions for both inverteroutput current ripple and neutral current as a function of PWM reference signal arederived first. Then, it is shown that injecting one fourth or twenty five percent thirdharmonic signal into three-phase sinusoidal reference signal may produce minimumoutput current ripple and neutral current. The twenty five percent third harmonicinjection signal can simultaneously minimize output current ripple and neutral currentof the three-level inverter only for unity power factor operation. Simulation andexperimental results are included to show validity of the analysis results.
关键词：current ripple; neutral current; PWM technique; third harmonic; three-level;inverter
