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Improved Quasi Z-Source Inverter with Shoot-Through and Non-Shoot-Through Duty Ratios Prone Enhanced and Controllable Voltage Gain
  • Pritam Kumar Gayen
Pritam Kumar Gayen

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The conventional quasi z-source inverters (QZSIs) are not capable of producing DC-side voltage gain through duty ratio control of switching pulses during non-shoot-through operation. This restricts freedom of control. In consequence, decoupled control between modulation index and duty ratio for producing DC-side voltage gain is not permitted. In this context, this paper proposes a novel active switched impedance network that contributes DC-side voltage gain through duty ratio control of the active switch during the non-shoot-through period. In effect, overall gain is improved. Also, variable DC-side gains are achieved at a fixed value of modulation index. Additionally, the shoot-through duty ratio based DC-side voltage gain is enhanced through the proposed active switched QZSI. The improved topology is analyzed. The simulation work is conducted in versatile operating conditions to highlight its diversified performances. The experiments also verify its operations under different conditions.1
19 Jan 2024Submitted to TechRxiv
26 Jan 2024Published in TechRxiv