Conclusions
A full-bridge inverter or so-called H-bridge cell is introduced. Basically, an Hbridge cell can generate up to three output voltage levels. The appropriate gate control
signal and blinking time are presented.
Multilevel inverter using cascaded-inverter with SDCSs are introduced in both
single-phase and three-phase structure. The output voltage is the sum of the output
voltage of each H-bridge cell. In three-phase system, the voltage THD can be improved
in line voltage. Finally, the reason to use SDCSs is explained.
In the next chapter, the concept of the optimized harmonic stepped-waveform
technique will be presented. Also, the procedure to find the switching angles for such a
waveform will be proposed.