Resumo

FLORES-FUENTES, Allan Antonio et al. Design and simulation of a resonant full-bridge multicell power inverter for high-voltage applications. Ing. invest. y tecnol. [online]. 2018, vol.19, n.3, pp.245-254. ISSN 2594-0732.  https://doi.org/10.22201/fi.25940732e.2018.19n3.021.

The design and simulation of a Full-Bridge Flying-Capacitor Multilevel-Inverter (FB-FCMI) for high-voltage applications are presented. The power inverter topology consists of two legs: each one with three commutation cells, six switches and two flying-capacitors. The proposed control system provides twelve square signals for all switches that compose the inverter, which is driven at a commutation frequency f SW ≈6.66 kHz. The output frequency f 0, is equal to three times the commutation frequency. The inductor and capacitor in the resonant-circuit design is calculated based on f 0, which depends on the number of cells, N. The goal of the proposed inverter design is to demonstrate that, the output frequency increases as rate of f 0 = N∙ f SW. In order to show the effect of the increase in the number of cells, a resonant power inverter is designed and simulated, first with three and then with six switching cells, at f 0 = 20 kHz. Finally, the FB-FCMI is connected to the primary winding of the high-voltage transformer, while the secondary is coupled to a Dielectric Barrier Discharge reactor represented by its electrical model, to generate an electrical discharge in helium.

Palavras-chave : Multilevel-inverter; full-bridge; resonant-circuit; dielectric barrier discharge; electrical model.