New multiple DC-DC converter topology with a high frequency zig-zag transformer

Three-Phase Three Level, Soft Switched, Phase Shifted PWM DC–DC Converter for High Power Applications

“…It should be mentioned that in this case soft switching of the semiconductor devices is achieved without taking help from any additional auxiliary circuitry comprising of active or passive elements. In the proposed topology the output rectifier is a center tapped full wave current tripler [10], [11] producing either two or three-level output voltage depending on the operating duty cycle. This leads to considerable reduction in size of the output filter compared to that of the conventional full bridge topology.…”