Open AccessSPACE VECTOR PWM SIGNAL GENERATION FOR ANY MULTILEVEL INVERTER BY USING REVERSE MAPPING TECHNIQUE
Author(s) -
K. V. Varalakshmi,
K. Balakrishna
Publication year - 2014
Publication title -
international journal of electrical and electronics engineering
Language(s) - English
Resource type - Journals
ISSN - 2231-5284
DOI - 10.47893/ijeee.2014.1122
Subject(s) - inverter , pulse width modulation , space vector , sequence (biology) , algorithm , modulation (music) , space (punctuation) , mathematics , computer science , topology (electrical circuits) , control theory (sociology) , voltage , engineering , physics , artificial intelligence , combinatorics , electrical engineering , acoustics , operating system , control (management) , biology , genetics
This paper proposes a generalized method for the generation of space vector pulse width modulation (SVPWM) signals for multilevel inverters. In the proposed method, the actual sector containing the tip of the reference space vector need not be identified. A method is presented to identify the center of a sub hexagon containing the reference space vector. Using the center of the sub hexagon, the reference space vector is mapped to the innermost sub hexagon, and the switching sequence corresponding to a two-level inverter is determined. A new technique is proposed in this paper, by which these two-level vectors are translated to the switching vectors of the multilevel inverter by adding the center of the sub hexagon to the two-level vectors. The proposed method can be extended to any n-level inverter, and a generalized algorithm is proposed. The scheme is explained for a five-level inverter, and experimental results are presented for a three-level inverter and seven level Inverter.