Z-source three-phase four-switch inverter with DC link split capacitor and comprehensive investigation of z-source three-phase four-switch inverters

Recently z-source network has been used in B4 inverter to create buck-boost four-switch three-phase inverter. In fact, these topologies combine the advantages of a traditional four-switch three-phase inverter with the advantages of the Z-impedance network. This paper proposes a new topology of z-source B4 inverter. New proposed topology, besides advantages of pervious z-source B4 inverters has the self-boost property and can be used as post-fault topology in the switch redundant fault tolerant Z-source inverter. For the proposed topology, both CBPWM and SVM switching method are proposed and the performance of CBPWM is verified by experimental results. Furthermore, comprehensive analysis on boost topologies for the B4 inverter including the proposed inverter is done in this paper. Analysis is done on switching strategy and boosting capability of different topologies.