An approach of sparse matrix converter using Z-source network

This paper presents an approach of sparse matrix converter (SMC) using Z-source network. The SMC is implemented by connecting a controllable rectifier and the traditional inverter through a Z-source network. The Z-source can produce any desired output voltage by controlling the shoot-through time. Compare to the traditional three-phase SMC, the three-phase Z-source SMC has the same number of switches, however, this topology extends output voltage range. In this paper, the new modulation algorithm is applied for the rectifier stage to generate a constant local average dc-link voltage. The input power factor is nearly unity in the whole operating system. Analysis, simulation and experimental results are provided to demonstrate advanced features of three-phase Z-source SMC.