讲座题目：All GaN 3kW Power Supply Unit
主讲嘉宾：Dr Ruiyang Yu，The University of Texas at Austin
时间：2018年9月27日，9:30—11:00
地点：机电楼S601
主持人：尹健
Abstract:
In 2025, data centers in the world are expected to consume up to 4.5% of total electricity consumption. There is increasing demand for better space utilization in the data center and today’s 15 kW rack will soon consume up to 60 kW. Higher efficiency and power density power supply units become inevitable not only to lower the data center electric bill but also allow more power and servers per rack. The GaN FETs have the capability of faster switching and lower on resistance than Silicon FETs. In many cost and space sensitive applications, GaN FETs can achieve high power density solution. The presentation will introduce the design and control of all GaN 3.2 kW 99% efficiency power factor corrector (PFC) and 98.5% efficiency LLC series resonant converter with power density higher than 60W/inch^3. The power supply unit consists of an interleaved totem pole power factor corrector (PFC) with triangular current mode (TCM) operating from 300 kHz to 1.5 Mhz and an LLC resonant converter with synchronous rectifiers operating at 500 kHz. Zero voltage switching can be achieved for both PFC and LLC converter which enable the increasing of the switching frequency as well as power density. Many detailed design considerations will be discussed such as controller implementation, magnetic component optimization, thermal management as well as some critical EMC/EMI issues.
Short Bio:
Dr Yu received the B.E. degree in Electrical Engineering from Shandong University in 2007, and the M.S. and PhD degrees in Power Electronics from The University of Hong Kong in 2008 and 2013 respectively. He was the postdoctoral research fellow and instructor in North Carolina State University from 2013 to 2017. Now he is the research associate in The University of Texas at Austin, working on several power electronics related projects, like Solid State Transformer, Dual Active Bridge Converter etc.
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