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X-WR-CALNAME:Department of Electrical and Computer Engineering (HKUECE) 電機與計算機工程系
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X-WR-CALDESC:Events for Department of Electrical and Computer Engineering (HKUECE) 電機與計算機工程系
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TZID:Asia/Hong_Kong
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TZOFFSETFROM:+0800
TZOFFSETTO:+0800
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DTSTART:20240101T000000
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BEGIN:VEVENT
DTSTART;TZID=Asia/Hong_Kong:20250307T093000
DTEND;TZID=Asia/Hong_Kong:20250307T223000
DTSTAMP:20260512T013255
CREATED:20250304T072753Z
LAST-MODIFIED:20250306T015705Z
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SUMMARY:Revolutionizing Power Electronics with Heterogeneous Integration
DESCRIPTION:Abstract\nTraditional power electronic equipment has long relied on discrete active and passive components\, with performance enhancements often requiring trade-offs. Despite technological advancements\, manufacturing processes remain labor-intensive and largely unchanged for decades. \nThe advent of wide-bandgap (WBG) power semiconductor devices\, such as silicon carbide (SiC) and gallium nitride (GaN)\, has significantly reduced conduction and switching losses compared to silicon-based counterparts. However\, current design methodologies primarily follow a ‘plug-and-play’ approach\, yielding only incremental improvements in efficiency and power density without fully leveraging the transformative potential of these technologies. \nThis presentation explores the integration of matrix magnetics with WBG power devices to drive a fundamental shift in power electronics design and manufacturing through heterogeneous integration. This holistic approach enables simultaneous enhancements in efficiency\, power density\, cost\, and electromagnetic interference (EMI) performance. Additionally\, it streamlines traditionally labor-intensive manufacturing processes—particularly those involving magnetics and system assembly—through automation. \nThe discussion will feature multiple research examples demonstrating heterogeneous integration of matrix magnetics in power converters across diverse applications and power ranges. These include high-frequency power converters for artificial intelligence (AI) and high-performance computing systems\, battery chargers for electric vehicles\, and solid-state transformers for DC power distribution. \n\nSpeaker\nProf. Qiang LI\nCenter for Power Electronics Systems (CPES)\,\nVirginia Tech \nBiography of the Speaker\nQiang Li received the B.S. and M.S. degrees from Zhejiang University\, China\, in 2003 and 2006\, respectively\, and the Ph.D. degree from Virginia Tech\, Blacksburg\, VA\, in 2011. He is currently a full professor in the Center for Power Electronics Systems (CPES) at Virginia Tech. His research interests include high-frequency power conversion and control\, high-density electronics packaging and magnetic integration\, as well as power solutions for high-performance computing\, data centers\, electric vehicles\, and energy storage systems. With over 300 peer-reviewed technical publications\, including 100 journal articles\, he has received eight prize paper awards and holds 26 U.S. patents. He currently serves as the Chair of Academic Affairs for the IEEE Power Electronics Society and is an associate editor for both the IEEE Transactions on Power Electronics and the IEEE Journal of Emerging and Selected Topics in Power Electronics. He is also a recipient of the U.S. National Science Foundation (NSF) Career Award. \nOrganiser\nDepartment of Electrical and Electronic Engineering\,\nThe University of Hong Kong \nAll are welcome!
URL:https://ece.hku.hk/events/20250307-2/
LOCATION:Room CB-603\, 6/F\, Chow Yei Ching Building\, The University of Hong Kong
CATEGORIES:Highlights,Seminar
ATTACH;FMTTYPE=image/jpeg:https://ece.hku.hk/wp-content/uploads/2025/03/1280-2.jpg
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DTSTART;TZID=Asia/Hong_Kong:20250307T100000
DTEND;TZID=Asia/Hong_Kong:20250307T110000
DTSTAMP:20260512T013255
CREATED:20250228T090613Z
LAST-MODIFIED:20250228T090613Z
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SUMMARY:RPG Seminar – Six Degrees of Freedom Tracking and Wireless Charging for Capsule Endoscopy
DESCRIPTION:Zoom \nLink: https://hku.zoom.us/j/95045238787?pwd=bAEbF49kv8uPbKPQG1n3B5I9bSphnT.1\nMeeting ID: 950 4523 8787\nPassword: 123456 \nAbstract\nCapsule endoscopy is an emerging technology providing a non-invasive approach to diagnose and monitor gastrointestinal diseases. However\, this technology has fundamental limitations of short-range of investigation due to limited battery capacity and uncertain position of the capsule inside the gastrointestinal tract. This research work attempts to address these two critical issues using a novel approach to seamlessly combine wireless battery charging\, and 6 degrees of freedom (6DoF) tracking of capsule endoscopy on a single apparatus. A full-scale complete prototype is presented in this paper\, wherein the receiving coil is integrated in a fully functional capsule\, and the transmitting coil is able to accommodate an adult human body. In the tracking operation\, a gradual DC magnetic field is generated in the transmitting coil. The magnetic field intensity surrounding the capsule is measured and consolidated with inertial measurement to identify the capsule’s position and orientation. In the evaluation\, the maximum mean absolute error for attitude angles and position are less than 3.80° and 2.07 mm\, respectively. A relatively uniform AC magnetic field will be generated while a low battery is detected. During wireless charging\, the capsule receives 376.08 mW of power\, resulting in an estimated charging rate of 2C for the capsule battery. \nSpeaker\nMr. ZHANG Heng\nDepartment of Electrical and Electronic Engineering\,\nThe University of Hong Kong \nBiography of the Speaker\nHeng ZHANG received the B.Eng. degree in 2017\, and the M.Eng. degree in 2020\, both in Electrical Engineering and Automation\, from Taiyuan University of Technology\, Taiyuan\, Shanxi\, China. From 2021 to 2022\, he was a research assistant with the Chinese University of Hong Kong\, Hong Kong. He is currently working toward the Ph.D. degree in electrical and electronic engineering from the University of Hong Kong\, Hong Kong. His research interests include sensing technology\, medical robotic design and control\, wireless power transfer\, and power electronics. \nOrganiser\nProf. Chi-Kwan Lee \nAll are welcome.
URL:https://ece.hku.hk/events/20250307-1/
LOCATION:Online via Zoom
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/jpeg:https://ece.hku.hk/wp-content/uploads/2024/11/rpg-seminar.jpg
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