A Novel Concept for Three-Phase Cascaded Multilevel Inverter Topologies

Md Hasan, A. Abu-Siada, Syed Islam, S. Muyeen
2018 Energies  
One of the key challenges in multilevel inverters (MLIs) design is to reduce the number of components used in the implementation while maximising the number of output voltage levels. This paper proposes a new concept that facilitates a device count reduction technique of existing cascaded MLIs. Moreover, the proposed concept can be utilised to extend existing single phase cascaded MLI topologies to three-phase structure without tripling the number of semiconductor components and input
more » ... and input dc-supplies as per the current practice. The new generalized concept involves two stages; namely, cascaded stage and phase generator stage. The phase generator stage is a combination of a conventional three-phase two level inverter and three bi-directional switches while the cascaded stage can employ any existing cascaded topology. A laboratory prototype model is built and extensive experimental analyses are conducted to validate the feasibility of the proposed cascaded MLI concept. Energies 2018, 11, 268 2 of 16 above mentioned CMLI topologies, some were mainly developed for three-phase multilevel voltage generation and cannot be directly utilized for single phase applications e.g., Figure 1c [ 24, 25] .
doi:10.3390/en11020268 fatcat:4zeb25minrccjljxvbxlb55etm