A new topology for half-bridge Z-source inverter based on gamma structure

摘要

In this paper, a new topology for half-bridge Z-source inverter based on Γ-structure is proposed. The proposed inverter can generate higher output voltage in comparison with conventional topologies. In the proposed inverter, not only voltage gain increases by changing the shoot-through duty cycle but also this value increases by changing turn ratio of transformer. Unlike the classic half-bridge inverter, the proposed half-bridge inverter is able to generate zero level in output voltage. In this paper, operation of proposed inverter in different operating mode is presented and design considerations are given. In addition, comparison of boost factor between the proposed and conventional inverters is provided. Finally, simulation results using PSCAD/EMTDC software verifies correct operation of the proposed inverter.