Switched Trans Z-source inverter using two isolated two-winding transformers

In this paper, new single stage high boost voltage inverters using transformers, called Switched Trans Z-source inverter. By replacing two inductors in the X-shaped Z-source inverter with two transformers and four diodes, the proposed inverter produces a very high boost voltage gain when the turn ratio of the transformers is larger than 1. In order to produce the same output voltage with the same modulation index and same input dc voltage, the proposed inverter uses a less passive component compared to the conventional Switched LZ-source inverters. Thus, the size, weight and passive component loss of the proposed inverter can reduce. This paper presents the operating principles, power loss analysis, simulation and experimental results, and compares with those of the conventional Switched LZ-source inverters.