Quasi Z-Source Resonant DC-DC Converter with Improved Voltage Gain

Authors

  • F.X Edwin Deepak
  • N. Chandrasekaran
  • J. E. Moshe Dayan
  • A. Jerman Shiyamala

Abstract

A dc- dc resonant quasi z-source converter is proposed. The key features are high step-up / step-down ratio, high efficiency, low system voltage tension, and soft-switching, i.e. turn-on ZVS for all switches, and turn-on and turn-off ZCS for all diodes in both buck / boost operating state. The main switch also operates in the lower resonant while in the upper resonant the active clamp switch operate to maintain the zero voltage switching (ZVS) condition for the main switch and there are small switching losses. The transformer's leakage inductance was used to create the clamp capacitor resonant circuit. Low input current ripple produced by using a boost circuit at the input of the converter ideal for applications in fuel cells. Over a wide load range, the proposed converter accomplishes ZVS for switches and zero current switching (ZCS) for diodes. Device voltage without any snubber circuit is also clamped.

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Published

2020-02-19

Issue

Section

Articles