报告题目：Introduction to GaN Devices and Best Utilization of LLC Resonant Converter

报告时间：2019年5月13日下午14：30

报告地点：信息学馆224会议室

报 告 人：刘雁飞 教授 （Prof. Yan-Fei Liu）

邀 请 人：杨东升 教授

Abstract: GaN switches can bring fast switching speed and lower conduction loss. The fast switching speed is good for reducing the switching loss. Unfortunately, it brings high frequency oscillation in hard switching converters. This seminar summarizes the features of the GaN switch and the directions as how to take advantages of these features. The rest of the seminar focuses on how to improve the performance of the commonly used LLC converters to meet the different application scenarios, including for wide input voltage and output voltage variation range, method high load current application, and high output power application. Current sharing and interleaving using the switch-controlled-capacitor (SCC) technique and common inductor technique are introduced.  A technique to reduce the conduction loss of the Synchronous Rectifier (SR) of the LLC converter is also introduced. Several hot applications, where LLC converter together with GaN switches can bring significant benefits, are highlighted.

演讲人简介：Prof. Yan-Fei Liu is a Fellow of IEEE and a Fellow of Canadian Academy of Engineering（加拿大工程院院士）. He received his Bachelor and Master degree from Zhejiang University in 1984 and 1987, and PhD degree from Queen’s University in 1994. He is currently a Professor with the Department of Electrical and Computer Engineering with Queen’s University.His current research interests include optimal application of latest wide band gap devices, such as GaN switches, digital control technologies for high efficiency, fast dynamic response dc–dc switching converter and ac–dc converter with power factor correction, resonant converters and server power supplies, and LED drivers. He has authored over 270 technical papers in the IEEE Transactions and conferences, and holds more than 39 U.S. patents and several Chinese patents. He is also a Principal Contributor for two IEEE standards.

Currently, Prof. Liu is the Vice President of Technical Operations of IEEE Power Electronics Society (2017-2020). His other major services to IEEE are: Editor of IEEE Journal of Emerging and Selected Topics of Power Electronics since 2013; General chair of IEEE Energy Conversion Conference & Congress 2019; Associate Editor for IEEE Transactions on Power Electronics; Chair of IEEE Power Electrical Society Technical Committee on Power Conversion Systems and Components.