Ebrahim Seifi Najmi - Tarbiat Modares University
M. Heydari - Tarbiat Modares University
M. Mohamadian - Tarbiat Modares University
S. M. Dehghan - Qom University of Technology

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 traditionalfour-switch three-phase inverter with the advantages of the Z-impedance network. This paper proposes a new topology of zsourceB4 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 faulttolerant 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 theB4 inverter including the proposed inverter is done in this paper. Analysis is done on switching strategy and boosting capability of different topologies.

B4 inverter, Z-source inverter, Reduced Fault toleant inverter