Novel cross-switch seven-level inverter with triple boost capability and self-balancing

A Switched Capacitor Inverter Structure with Hybrid Modulation Method Lowering Switching Loss

“…The parameters of the experiment are listed in Table 6. 13 demonstrates the waveforms of the switching signals of each power switch under two different modulation methods: one is the hybrid method proposed in this paper (pink waveforms) and the other is the traditional phase disposition modulation method (PD-PWM) which is widely used in other papers [12][13][14][15][16] (blue waveforms). The two different modulations lead to different switching signals and, certainly, switching frequency.…”

“…The V dc is still 24 V, and the load is still 200 Ω. The maximum voltage ripple of various capacitors can be calculated using Equations ( 9) and (12). And the total ripple loss is estimated to be 0.1503 W.…”

“…The Vdc is still 24 V, and the load is still 200 Ω. The maximum voltage ripple of various capacitors can be calculated using Equations ( 9) and (12). And the total ripple loss is estimated to be 0.1503 W. The above three sections have analyzed the switching losses, conduction losses and ripple losses, respectively, which nearly includes all the losses in the proposed inverter.…”

“…However, power switches in the backend H-bridge have to withstand maximum output voltage, which significantly increases the voltage stress of the inverter. To reduce the voltage stress, SC inverters without H-bridges have been successively proposed in [11][12][13][14][15][16][17][18]. The topologies proposed in [11,12] are all seven-level SC inverters.…”

“…To reduce the voltage stress, SC inverters without H-bridges have been successively proposed in [11][12][13][14][15][16][17][18]. The topologies proposed in [11,12] are all seven-level SC inverters. Compared with [9,10], they have lower voltage stresses.…”