Single-Stage High Boost Quasi-Z-Source Inverter with Transformer

Minh-Khai Nguyen

J. of Advanced Engineering and Technology, Vol. 5, No. 3 (2012) pp. 191-197

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This paper proposes a new family of single-stage high boost voltage inverters based on transformer. By replacing one of the two inductors in the classical Z-source inverter with 2:1 transformer, the proposed inverter produces a very high boost voltage gain. In comparison to the conventional trans-quasi-Z-source inverter, the proposed inverter has a higher boost voltage gain with smaller shoot-through duty cycle. This paper presents the operating principles, analysis and simulation results. To verify the performance of the proposed inverter, a 3 kW inverter is considered in the simulation. The simulation results agree with the theoretical analysis.

Keywords: Z-source inverter, Quasi-Z-source inverter, Transformer, Shoot-through state