Higher voltage level and lower total harmonic distortion in a new setting up multilevel inverter

摘要

In this paper some new multilevel inverter topologies, their characteristics and also block diagram are presented. They are essentially based on cascade multilevel inverter with the same number of switches and separated dc sources. The paper is illustrated that increasing the number of output waveform levels in the topologies reduces the low order harmonics and also the total harmonic distortion which are so harmful and trouble maker in power electronic devices. It's shown that one of the presented multilevel inverter topologies uses a method which reduces the number of in use switches. The effect of higher DC link voltage on multilevel inverters is also explained. A new topology of multilevel inverter is presented too which has the highest number of output voltage levels due to the number of the cells which is made it so operational. The topologies MATLAB simulation comparison results are presented as well.