Author :
Santos, E. C dos, Jr. ; Muniz, J.H.G. ; Silva, E. R C da
Author_Institution :
Electr. Eng. Dept., Fed. Univ. of Campina Grande, Campina Grande, Brazil
Abstract :
This paper proposes a single-phase inverter with four levels at the output converter side. The proposed inverter can be considered as an intermediate configuration between the 3-level 4-switch H-bridge and 5-level 8-switch H-bridge topologies. It is called as 2L3L inverter, since it is composed of one two-level leg and one three-level leg. The most important characteristics of the proposed configuration are: reduced number of semiconductor devices, the same blocking voltage for all switching devices, and no low frequency current circulating in dc-link capacitors. Details regarding the operation of the configuration and modulation strategy is presented, as well as the comparison between the proposed H-bridge inverter and the conventional NPC four-level inverter. Simulated and experimental results are presented to validate the theoretical expectations.
Keywords :
capacitors; invertors; power semiconductor devices; switching convertors; 2L3L inverter; 3-level 4-switch H-bridge inverter topology; 5-level 8-switch H-bridge inverter topology; DC-link capacitor; NPC four-level inverter; blocking voltage; frequency current; output converter side; semiconductor device; single-phase inverter; switching device; two-level leg three-level leg inverter; Capacitors; Inverters; Modulation; Semiconductor diodes; Switches; Topology;
Conference_Titel :
Power Electronics Conference (COBEP), 2011 Brazilian
Conference_Location :
Praiamar
Print_ISBN :
978-1-4577-1644-7
Electronic_ISBN :
2175-8603
DOI :
10.1109/COBEP.2011.6085331