New active capacitor voltage balancing method for five-level stacked multicell converter

Modification of SPWM Modulating Signals for Energy Balancing Purposes

“…LS PWM per modulating signal cycle [22,[25][26][27][28] In this modulation strategy, the carrier signals are shifted in level according to the modulating signal cycles to perform the energy balance [29]. Figure 6 shows the carrier and modulator signals of this technique.…”

“…LS PWM per carrier signal cycle [6,23,28,29] In this strategy, the carrier signals are shifted in level according to each cycle of the same. It is worth mentioning that this modulation technique, as with the previous one presented, uses the multicarrier PD PWM strategy as a basis and modifies it.…”

“…It is worth mentioning that this modulation technique, as with the previous one presented, uses the multicarrier PD PWM strategy as a basis and modifies it.  LS PWM per carrier signal cycle [6,23,28,29] In this strategy, the carrier signals are shifted in level according to each cycle of the same. It is worth mentioning that this modulation technique, as with the previous one presented, uses the multicarrier PD PWM strategy as a basis and modifies it.…”