Séminaire, Dr. Ke LI, University of Nottingham, UK, 30 Jan. 2023

	Doctoral School Unit « Sustainable Development Applications »
	Within the framework of IEEE Vehicle Power Propulsion – Technical Committee

Wide bandgap (SiC/GaN) power semiconductor devices
State-of-the-art, application to electrified vehicles and other

Dr. Ke LI
University of Nottingham

Monday 30 January 2023 / 14-16h Amphi Atrium ESPRIT

Abstract

Developing efficient and optimised electrical power conversion systems is an important area in global research and it is regarded as one major solution when we face society problems such as energy crisis and environment pollution, which is essential for sustainable development. Future electrical systems require high efficiency, high power density electrical power conversion with low cost, where power electronics systems play an important role.
With advantages such as lower resistance, smaller capacitance and higher operation temperature than traditional silicon (Si) devices, wide bandgap (WBG) power semiconductor devices (silicon carbide SiC and gallium nitride GaN) can bring a step change in modern electrical power conversion and meet future electrical systems requirements. However, advantages of WBG devices cannot be fully exploited by simply replacing them to Si devices. In order to have a clear understanding of WBG devices, developing new power electronics technologies is necessary to maximise their advantage, which offer a broad application in modern transport systems, integrated drive and electrical energy transfer.
State of the art of WBG devices on device characteristics, switching, modelling and measurement techniques will be presented in the first part of the seminar, where audience will know the advantages and challenges of those devices. In the second part of the seminar, the application of WBG devices in high efficiency, high power-density electrical systems will be presented, where audience will see more demonstrators on how to better exploit WBG advantages in modern electrical systems, such as electrical vehicles, integrated drive, modern power electronics systems design and electrical energy transfer. In the last part of the seminar, perspectives of future WBG devices research and application will be presented, in which audience will understand WBG devices application trend in electrical power conversion systems.

About the Speaker

Dr. Ke Li received B.E and M.E degrees in electrical engineering from the Southwest Jiaotong University, China, in 2008 and 2011 respectively, and the Eng. degree from the Ecole Centrale de Marseille, France, in 2011. He received the Ph.D degree in electrical engineering from the University of Lille, France, in 2014. Since 2015, he has been working as a research fellow in the Power Electronics, Machines, and Control Group, University of Nottingham, UK. His current research interests include wide-bandgap (SiC/GaN) power semiconductor devices characterisation, modelling and integration to high power-density power converters.
He was co-chair of power electronics session of IEEE-VPPC 2016 and of IEEE WIPDA-Asia 2018 and he was co-chair of awards committee of IEEE-VPPC 2017. He received best conference paper of several conferences such as IEEE EPE 2014, IEEE-VPPC 2016 and ICEPT 2018.