Performance comparison of T-ZSI, ZSI and VSI based on the power loss during switching operation of installed power IGBT switch for EV Applications

Abstract

In this paper Trans-Z source inverter (.T-ZSI), Z Source Inverter (.ZSI) and Voltage source inverter (VSI) topology performance is compared, analyzed and power loss due to switching of IGBT is calculated under time domain. During the switching operation, power loss depends on the numbers of switches, ratings and specifications. Various PWM techniques are used to overcome the losses due to switching sequence. By varying modulation index (M) to a particular level ¿ 1, power loss in T-ZSI and ZSI is minimized. To determine the losses, mathematical formulation in time domain is framed. Based on the power loss during switching operation, motors for Electrical Vehicle (EV) are selected. For lower input voltage 400V, VSI topology is selected which boost the voltage to 600V and gives better performance compared to T-ZSI and ZSI in all the operating points. Whereas T-ZSI and ZSI used its shoot through states to boost the voltage during off condition. An experimental setup with a input of 400V, 600V,800V and 1200V having maximum frequency of 15Khz is selected and the power loss across the IGBT switches is calculated for three different inverter topologies. The Electric Vehicles/Hybrid Electric Vehicles are considered as the main transportation vehicles of future as they use non fossil fuels. These are feature rich, easy to handle, operate and durable with high reliability [3]. The proposed research is intended to explore the possibility of increasing the driving range of the Electric Vehicles (EVs) with a smart power electronic converter having high efficiency and reliability