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Xingxuan Huang and Jingjing Sun to give Power and Energy Seminar on Friday, March 8

Xingxuan Huang and Jingjing Sun, both from the University of Tennessee, will give the CURENT Power and Energy Seminar on Friday, March 8. This seminar may be viewed remotely through ZOOM (see info. toward bottom of email). 

CURENT Power and Energy Seminar

Presenters: Xingxuan Huang, University of Tennessee, and Jingjing Sun, University of Tennessee

Time: Friday, March 8, 12:20 PM - 1:10 PM EST

Location: Min H. Kao Building, Room 622

Presenter: Xingxuan Huang

Title: Design and Switching Performance Evaluation of 10 kV SiC MOSFET Phase Leg For Medium Voltage Applications

Abstract: 10 kV SiC MOSFETs with superior switching performance are promising in a wide range of medium voltage (MV) applications. Switching transients and performance of 10 kV SiC MOSFETs should be investigated in order to apply them in MV power conversion systems. Previous investigation usually neglects the parasitics in the converter, which actually impacts the switching transients significantly. In this talk, the design and testing of a 6.5 kV half bridge phase leg based on 10 kV SiC MOSFETs are introduced first. The phase leg is designed and tested to operate as a reliable building block in a MV converter. Then the phase leg is utilized for the switching performance investigation of 10 kV SiC MOSFETs. The impact of the parasitic capacitors on the switching performance is analyzed in detail, especially the impact on the switching loss and dv/dt.

Bio: Xingxuan Huang received his BS Degree in electrical engineering from Xi’an Jiaotong University, Xi’an, China, in 2016. He is currently a PhD student in electrical engineering at the University of Tennessee, Knoxville, TN, USA. His current research interest include applications of SiC power devices, and medium voltage converter design with wide bandgap (WBG) devices.

Presenter: Jingjing Sun

Title: Inductor design and ZVS control for a GaN-based high efficiency CRM totem-pole PFC converter 

Abstract: Nowadays, the gallium nitride (GaN)-based critical conduction mode (CRM) totem-pole power factor correction (PFC) converter is prevalent in telecommunication power supplies and other server applications. In this work, detailed design of a single-phase GaN-based soft-switched CRM totem-pole PFC is presented. A full-line-cycle (zero-voltage-switching) ZVS modulation is derived, and an analytical converter model with ZVS margin is proposed. Inductor design with toroidal powder cores is demonstrated to minimize the converter loss and inductor size. To implement the CRM operation, digital on-time control with real-time calculation and zero-current-detection (ZCD) signal is adopted. A 1.5 kW single-phase GaN-based CRM totem-pole PFC prototype is demonstrated with full-line-cycle ZVS and 98.8% full-load efficiency.

Bio: Jingjing Sun received her B.S. degree from Xi’an Jiaotong University, Xi’an, China, in 2016, in electrical engineering. Currently, she is a PhD student in power electronics at CURENT, University of Tennessee, Knoxville, TN, USA. Her research interests are wide-bandgap semiconductor devices and applications, power supply design for data centers.

Zoom Information:

Join from PC, Mac, Linux, iOS or Android: https://tennessee.zoom.us/j/320375975 

Or iPhone one-tap (US Toll): +16468769923,320375975# or +16699006833,320375975#

Or Telephone: Dial: +1 646 876 9923 (US Toll) +1 669 900 6833 (US Toll) Meeting ID: 320 375 975

International numbers available: https://zoom.us/u/acJ7jvPLca

Or an H.323/SIP room system: H.323: (US West) or (US East) Meeting ID: 531 399 714

SIP: 320375975@zoomcrc.com

Upcoming Seminars

Friday, March 15th - Maha Krishnamurthy, University of Tennessee Research Foundation (UTRF) - IP/Entrepreneurship and I-Corps Overview

Friday, March 22nd - No Seminar - Spring Break

Friday, March 29th - Industry Seminar - Dr. Yonghong Chen, MISO (remote) - TBD

See the CURENT calendar for more news and seminars