Current-type flipped-Γ-source inverters

Abstract

Z-source inverters are innovative single-stage topologies proposed for flexible buck-boost energy conversion. To raise their gains and modulation ratios further, a number of variations have been introduced with some using magnetically coupled transformers or inductors. These variants are of interest since they use lesser components. Their winding turns might however become too excessive for higher demanded gains. Avoiding this usual trend, a new family of current-type flipped-Γ-source inverters are proposed, whose common gain is raised by lowering, and not increasing, the winding turns. Such capability is achieved without compromising component stresses, maximum achievable gain and modulation ratio. Experimental results have already demonstrated the practicality of the proposed inverters.