ADVANCING FAST CHARGING EFFICIENCY FOR ELECTRIC VEHICLES WITH MULTI-DEVICE INTERLEAVED BOOST CONVERTERS

Abstract

In this dissertation, I have studied research papers on making a highly efficient, low-losses voltage utilization system for electric vehicle charging. Additionally, I have learned and performed simulations on DC-DC converters for the fast charging of electric vehicles from the grid and renewable energy sources (solar energy). Compared to conventional boost converters, interleaved boost converters, and multidevice boost converters, a multidevice interleaved boost converter was superior for high-power charging applications for electric vehicles. The dissertation is organized as follows: Chapter 1 includes an introduction with the background on why electric vehicles are needed today, mainly due to environmental issues. It also discusses renewable energy harvesting, such as solar energy, and its application for electric vehicle charging. Chapter 2 presents a literature review, a study of research papers, and a description of the motivation for work in this field. This chapter identifies which DC converters are best suited for high power handling, better efficiency, low losses, and low EMI interferences based on the reviewed papers. Chapter 3 explains the role of boost converters in EV charging and how to design a boost converter. Chapter 4 examines the interleaved two-phase boost converter, detailing how it improves upon conventional boost converters and how to design an interleaved boost converter (IBC). Chapter 5 covers multidevice boost converters and multidevice interleaved boost converters, the development of control methods for a two-phase multidevice interleaved boost converter, and comparing it with other converters. Chapter 6 presents simulation results of boost converters interleaved boost converters, and multidevice interleaved boost converters. It includes a comparison between all the converters and the final simulation model, which incorporates a PV array (without controlling) and converter drive the 3-phase BLDC motor by using VSI inverter. Chapter 7 provides the conclusion and future scope, indicating the comparative parameters of the simulated converters. It also discusses the future potential of multidevice interleaved boost converters, suggesting that they can perform better in bidirectional power supply and can be developed into multidevice interleaved buck-boost bidirectional converters for V2G (Vehicle-to-Grid) or G2V (Grid-to-Vehicle) applications for electric vehicles, Chapter 8. References.