Effect of Parasitic Components in Voltage Drop and Design Consideration of the Switched Impedance Inverter

Abstract

This paper investigates the impact of parasitic elements on the performance of switched impedance inverters. This work develops a non-ideal impedance source inverter model, enabling more accurate predictions of voltage gain, current relationships, and overall converter behaviour under practical operating conditions. By quantifying the influence of parasitic components on key parameters such as voltage, current, and component selection, this research provides valuable insights for optimising the design of switched impedance inverters. Furthermore, the reliability modelling highlights the sensitive elements in the operation of the inverter. The analysis examines power transfer characteristics within the inverter bridge, considering both zero and non-zero states, and investigates the impact of switching frequency, output frequency, and duty cycle on the DC-link current. Experimental results validate the findings, demonstrating the practical significance of considering parasitic elements in the design and optimisation of switched impedance inverters. By improving the accuracy of theoretical predictions, this research contributes to reducing experimental iterations, minimising costs, and mitigating the risk of encountering unforeseen issues during the development and implementation of these converters.