Step-Up DC/DC Converters with the Tristate Quasi-Z-Source Network

This paper presents the Step-Up DC/DC Converters With The Tristate quasi- Z-Source Network. This paper is based on the step-up dc/dc converter family with a cascaded quasi-Z-source network. The tri-stage network could be derived by adding of one diode, one inductor, and two capacitors to the two quasi-Z-source inverter. It has advantages of Voltage boost and buck functions in a single stage, continuous input current and improved reliability. Theoretical analysis of the tri-stage quasi Z-Source network in the shoot-through and non-shoot-through operating modes is described. To further decrease the shoot-through duty cycle at the same voltage boost factor, the number of stages of the quasi Z-Source-network could be increased.