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http://dx.doi.org/10.5370/JEET.2013.8.5.1062

A Simple Current Ripple Reduction Method for B4 Inverters  

Lee, Dong-Myung (School of Electronic and Electrical Engineering, Hongik University)
Park, Jae-Bum (Dept. of Electrical and Computer Engineering, Texas A&M University)
Toliyat, Hamid A. (Dept. of Electrical and Computer Engineering, Texas A&M University)
Publication Information
Journal of Electrical Engineering and Technology / v.8, no.5, 2013 , pp. 1062-1069 More about this Journal
Abstract
This paper proposes a simple current compensation method to improve the control performance of B4 inverters. Four-switch inverters so called B4 inverters employ only four switches. They have a split dc-link and one phase of three-phase motors is connected to the center-tap of split dc-link capacitors in B4 inverters. The voltage ripples in the center tap of the dc-link generate unbalanced three-phase voltages causing current ripples. To solve this problem, this paper presents a simple compensation method that adjusts switching times considering dc-link voltage ripples. The validity of the proposed method is verified by simulations and experiments carried out with a 1 HP induction machine.
Keywords
B4 inverters; Current ripple reduction; Split dc-link;
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