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PRODID:-//Department of Electrical and Computer Engineering (HKUECE) 電機與計算機工程系 - ECPv6.16.2//NONSGML v1.0//EN
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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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DTSTART:20220101T000000
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BEGIN:VEVENT
DTSTART;TZID=Asia/Hong_Kong:20230803T111500
DTEND;TZID=Asia/Hong_Kong:20230803T130000
DTSTAMP:20260515T222625
CREATED:20250224T023748Z
LAST-MODIFIED:20250224T023748Z
UID:109902-1691061300-1691067600@ece.hku.hk
SUMMARY:Seminar - Qusai-Single-Stage Current Fed Resonant AC-DC Converter Having Improved Heat Distribution
DESCRIPTION:Zoom Link: https://hku.zoom.us/j/94898976823?pwd=K1NlUldEZUtzOGlqbUtzUDlZMjNHQT09\nMeeting ID: 948 9897 6823\nPassword: 03082023 \nAbstract\nIn the seminar\, I will present one of my previously published works. This work presents a quasi-single-stage current-fed resonant ac-dc converter having improved heat distribution. Secondary-side switches are turned off with a voltage close to zero at high instantaneous power and with a voltage close to half of the output voltage at low instantaneous power. Switching losses at the primary-side bottom switches are reduced; this change improves the heat distribution over the switches. The primary-side duty-cycle fixed at 0.5 results in negligible input current ripple; this trait can significantly reduce the size of the filter inductor at the grid side. Experimental results show the effectiveness of the proposed ac-dc converter and its improved heat distribution against a conventional solution. \nBiography of the Speaker\nWaqar Uddin was born in Upper Dir\, Khyber Pakhtunkhwa\, Pakistan in 1989. He received his B.S. degree in Electrical Power Engineering from COMSATS University Islamabad\, Pakistan in 2013\, and his Ph.D. degree in 2020 from Pusan National University\, Busan\, South Korea. \nHe worked as a Postdoctoral Researcher at Dongguk University\, Seoul\, South Korea in 2020/2021. He also worked as a Lecturer at the University of Management & Technology\, Lahore Pakistan from 2016 to 2018. Currently\, he is with the National University of Technology (NUTECH)\, Islamabad\, Pakistan\, where he serves as an Assistant Professor. \nHe has published 60 research and review articles in reputable journals and international conferences with a cumulative impact factor of 170+.  His work has been cited 1300+ times having an h-index of 19 and an i-10 index of 28 according to google scholar. \nHis research interests include power converters design and control\, grid-connected converters\, electric drives\, and integration of renewable energies into the grid.
URL:https://ece.hku.hk/events/seminar-qusai-single-stage-current-fed-resonant-ac-dc-converter-having-improved-heat-distribution-2/
LOCATION:Online via Zoom
CATEGORIES:Seminar
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