Abstract
This paper presents a new multiphase-multilevel inverter configuration for open-winding loads and
suitable for medium power (low-voltage/high-current) applications such as ‘More Electric Aircraft’.
Modular structure comprised of standard dual three-phase voltage source inverter (VSI) along with
one additional bi-directional semi-conductor device (MOSFET/IGBT) per phase and two capacitors
with neutral point. The additional switches and capacitors are introduced to generate the additional
voltage levels in outputs of the VSI. An original modified single carrier five-level modulation
(MSCFM) algorithm is developed in this work and overcomes the complexity of standard space vector
modulations, easy for real implementation purposes in digital processors. Proposed six-phase
multilevel inverter configuration generates multilevel outputs with benefit in comprises with standard
multilevel inverter topologies. Further, the complete numerical model of the proposed AC converter
along with pulse-width modulation (PWM) is developed with Matlab/PLECS simulation software’s. A
set of observed results is presented in balanced working condition and always shown good agreement
with the theoretical developments.