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Digital-Scalar PWM Approaches Applied to Four-Leg Voltage-Source Inverters

【摘要】 In this paper, we present two modulation schemes for generating unbalanced voltages by means of four-leg voltage-source inverters. The first modulation is an extended scheme of a digital-scalar pulsewidth modulation previously proposed for controlling three-leg inverters. The second one is based on the decomposition of the voltage reference signals into their symmetrical components. The schemes are compared theoretically by simulations and experimental results. As a consequence, we find out a total equivalence between the two modulations despite their different conceptions. The fundamentals of both techniques and a mathematical proof of their equivalence are unfolded. Also, the performances of the techniques with respect to the harmonic distortion and power switching loss are discussed. The results show that the techniques are effective.

【期刊名称】 Industrial Electronics, IEEE Transactions on

【作者】 Fernandes, D. A.; Costa, F. F.; dos Santos, E. C.;

【作者单位】 Department of Electrical Engineering, Federal University of Paraíba, João Pessoa, Brazil;

【收录信息】;

【年(卷),期】2013(60),5

【年度】2013

【页码】p.2022-2030

【总页数】9

【原文格式】PDF

【正文语种】eng

【中图分类】;

【关键词】Equations; Inverters; Space vector pulse width modulation; Switches; Vectors; Dynamic voltage restorer; four-leg voltage-source inverter (VSI); pulsewidth modulation (PWM); scalar PWM; space vector PWM (SVPWM); switching loss; unbalanced voltages; zero sequence;

【原文服务方】国家工程技术数字图书馆

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