A Modified Boost Converter with Triswitching State and VLSI module for DC Nanogrid Application

Abstract

In this paper, new members of the Modified Boost Converter (MBC) family are introduced named as Modified tri switching state boost converter (MTSSB) with voltage boosting module. Additionally, one more extra switching mode is introduced to boost the voltage gain and for full range voltage control. The proposed configuration is designed by incorporating the voltage lift switched inductor (VLSI) module in the MTSSB converter. Depending upon the placement of the VLSI module, the configurations are named as MTSSBVLSI-XL, MTSSBVLSI-LY, and MTSSBVLSI-XY. The key features of the proposed configurations are: i) three switches controlled by two different duty cycles for full voltage control, ii) continuous input current, iii) lower voltage stress on the switch, and iv) high voltage gain. The proposed converter is developed for 20V/26-400V, 500W, and operating frequency is 50 kHz. The mathematical analysis is done to derive voltage conversion ratio along with operating modes under CCM mode. Simulation results verify the performance of the converter.