Abstract
Hextuple-inverter configuration for multilevel
nine-phase symmetrical open-winding DC converter is
articulated in this work. Power modular unit consists of six
classical three-phase voltage source inverters (VSI). Each
VSI includes one bi-directional device (MOSFET/IGBT) per
each phase and link to two capacitors for neutral connection.
A modified single carrier five-level modulation (MSCFM)
algorithm is developed and modulates each 2-level VSI as 5-
level multilevel inverter (MLI). A set of test results is
presented, which are observed from the model based
developments in numerical simulation software’s
(Matlab/PLECS). The results always showed good
conformity with the developed theoretical background under
working conditions. The proposed converter found suited for
(low-voltage/high current) electric vehicles, DC tractions and
‘More-Electric Aircraft’ applications.