Category: People

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Taiwei Chen (陳泰瑋) – Ph.D. Student

Taiwei Chen received his B.S. degree in Engineering Science from National Cheng Kung University (NCKU). He earned his M.S. degree in Electrical Engineering from the University of Texas at San Antonio, USA (UTSA), where he was involved in research on EMI/EMC performance in power electronics. His Master’s thesis was on “Inductor Design for Common-mode and Differential Mode Inductors” published in Dec. 2014. He has more than 6 years of experience in inverter circuit design, product testing and certification as an electrical engineer in the renewable energy industry. He is pursuing his PhD degree in Electrical Engineering at National Taiwan University. His research interests include energy harvesting power electronics, electric vehicles, improvement of microinverters, and electric power subsystem design of nano-satellites.

Papers:

Taiwei Chen and Katherine A. Kim, “Nanosatellite Power System with A Variable DC Bus Voltage for Improved System Efficiency,” IET International Conference on Engineering Technologies and Applications (IET-ICETA), Changhua, Taiwan, Oct. 2022, pp. 1-2, doi: 10.1109/IET-ICETA56553.2022.9971477.

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Selin Bagci – Ph.D. Student

Selin Bagci received the B.S. degree in Electrical and Computer Engineering in 2018 from Ulsan National Institute of Science and Technology (UNIST), South Korea. She received the M.S. in Electrical Engineering in 2020 from National Taiwan University of Science and Technology (NTUST), Taiwan. She is currently a Ph.D. student in the Electrical Engineering Department at National Taiwan University. Her research interests are in dc-dc converter development and control for photovoltaic energy harvesting applications.

Papers:

Lien-Chieh Chen, F. Selin Bagci, and Katherine A. Kim, “An Improved Photovoltaic Differential Power Processing System Using Bidirectional Boost-Type Converters With Synchronous Switching,” IEEE Transactions on Power Electronics, vol. 39, no. 12, pp. 16720-16730, Dec. 2024, doi: 10.1109/TPEL.2024.3438116.

Katherine A. Kim, F. Selin Bagci, and Anwell Ho, “Using a Partially Flipped Classroom and Gamification to Improve Student Performance in a First-Year Electronic Circuits Course,” IEEE Transactions on Education, vol. 67, no. 5, pp. 758-766, Oct. 2024, doi: 10.1109/TE.2024.3422017.

To-Lei Huang, F. Selin Bagci, and Katherine A. Kim, “Indoor Panel-Based Photovoltaic Emulation Method Implementation and Evaluation,” IEEE Workshop on Control and Modeling for Power Electronics, Lahore, Pakistan, Lahore, Pakistan, 2024, pp. 1-7, doi: 10.1109/COMPEL57542.2024.

F. Selin Bagci and Katherine A. Kim, “Building Fabric Power Converters for Wearable Energy Harvesting Applications,” IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, CA, USA, 2024, pp. 3192-3198, doi: 10.1109/APEC48139.2024.10509321.

Lien-Chieh Chen, F. Selin Bagci, and Katherine A. Kim, “Comparison of Bidirectional Flyback and Split-Inductor Boost Converter Topologies for Photovoltaic Differential Power Processing Systems” IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia (WiPDA Asia), Hsinchu, Taiwan, 2023, pp. 1-6, doi: 10.1109/WiPDAAsia58218.2023.10261924.

Darsana Deo, F. Selin Bagci, and Katherine A. Kim, “Comparison of Controllable Photovoltaic Emulation Methods for Real-Time Hardware Experiments” International Conference on Power Electronics (ICPE 2023-ECCE Asia), Jeju Island, Korea, 2023, pp. 2468-2474, doi: 10.23919/ICPE2023-ECCEAsia54778.2023.10213934.

F. Selin Bagci, Richard Angsetya, Sean Logi, Katherine A. Kim, “Flexible PCB Connection Methods for Wearable Energy Harvesting Applications,” IEEE Applied Power Electronics Conference and Exposition (APEC), 2023, pp. 1881-1887, doi: 10.1109/APEC43580.2023.10131451.

Katherine A. Kim, F. Selin Bagci, and Kristen L. Dorsey, “Design considerations for photovoltaic energy harvesting in wearable devices,” in Scientific Reports, vol. 12, pp. 1-12, October 28, 2022, art. no. 18143, doi: 10.1038/s41598-022-22232-x.

F. Selin Bagci, Katherine A. Kim, Yu -Chen Liu and Yi-Hua Liu, “Evaluation of Power Maximization and Curtailment Control Methods for Converters in Wearable Photovoltaic Energy Harvesting Applications,” in IEEE Open Journal of Power Electronics, pp. 508-520, August 2022, doi: 10.1109/OJPEL.2022.3194185.

F. Selin Bagci and Katherine A. Kim, “Performance Comparison of Burst-Mode MPPT and Perturb and Observe MPPT Algorithms for Photovoltaic Energy Harvesting Applications,” in Proc. IEEE Energy Conversion Congress Exposition (ECCE), Vancouver, BC, Canada, Oct. 2021.

F. Selin Bagci and Katherine A. Kim, “Burst-Mode Maximum Power Point Tracking Algorithm for Low-Power Photovoltaic Energy Harvesting Applications,” in Proc. IEEE Energy Conversion Congress Exposition Asia, Singapore, May. 2021, pp. 1-6. 

F. Selin Bagci, Katherine A. Kim, Ting-Yu Lin and Yu-Chen Liu, “Power Profile Measurement and System Design Analysis for a Wearable Photovoltaic Application,” in Proc. International Power Electronics and Motion Control Conference – ECCE Asia, Nanjing, China, Dec. 2020, pp. 1469-1474.

F. Selin Bagci, Yu-Chen Liu, and Katherine A. Kim, “Low-Power Photovoltaic Energy Harvesting With Parallel Differential Power Processing Using a SEPIC,” in Proc. IEEE Applied Power Electron. Conf.,  Mar. 2019, pp. 2008-2014.

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Bo-Kyung Yoon (윤보경) – M.S. (Co-Advisee)

Bokyung Yoon received the B.S. degree in Electrical and Computer Engineers from Ulsan National Institute of Science and Technology (UNIST) in 2018 and the M.S. degree in Electrical Engineering from UNIST in 2020. Her research interests are in analysis, control, and hardware development for energy harvesting power electronics.

Papers:

Jin Pyo Lee, Jae Won Lee, Bo-Kyung Yoon, Hee Jae Hwang, Sungwoo Jung, Katherine A. Kim, Dukhyun Choi, ChangdukYang, Jeong Min Baik, “Boosting the energy conversion efficiency of a combined triboelectric nanogenerator-capacitor,” Nano Energy, vol. 56, pp. 571-580, Feb. 2019.

Bo-Kyung Yoon, Jee-Hoon Jung, Jeong Min Baik, and Katherine A. Kim, “Realistic Circuit Modeling Using Derating Factors for Triboelectric Nanogenerators in Energy Harvesting Applications,” in Proc. International Conference on Power Electronics – ECCE Asia, May 2019.

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Hoejeong Jeong (정회정) – M.S.

Hoejeong Jeong received the B.S degree in ECE from Ulsan National Institute of Science and Technology (UNIST) in 2017. She majored in Electrical Engineering and System Design. She graduated with the M.S. degree in ECE from UNIST in February 2019. Her research interests are energy harvesting for wearable devices, GaN transistors, and DPP systems.

ORCID: 0000-0001-7468-7990

Papers:

Hoejeong Jeong, Seungbin Park, Jeehoon Jung, Taewon Kim, A-Rong Kim, and Katherine A. Kim, “Segmented Differential Power Processing Converter Unit and Control Algorithm for Photovoltaic Systems,” in IEEE Transactions on Power Electronics, vol. 36, no. 7, pp. 7797-7809, July 2021.

Seungbin Park (박승빈), Mina Kim (김민아), Hoejeong Jeong (정회정), Taewon Kim (김태원), Katherine A. Kim (김예린), and Jee-Hoon Jung (정지훈), ” Bidirectional Flyback Converter Design Methodology for Differential Power Processing Modules in PV Applications (PV 시스템의 차동 전력 조절기 모듈용 양방향 플라이백 컨버터 설계 방법),” Transactions of the Korean Institute of Power Electronics (전력전자학회 논문지) , Vol. 24, No.5, October 2019.

Hoejeong Jeong, Hyunji Lee, Yu-Chen Liu and Katherine A. Kim, “Review of Differential Power Processing Converter Techniques for Photovoltaic Applications,” IEEE Transactions on Energy Conversion, vol. 34, no. 1, pp. 351-360, Mar. 2019.

Hoejeong Jeong, Hyeun-Tae Cho, Taewon Kim, Yu-Chen Liu and Katherine A. Kim, “A Scalable Unit Differential Power Processing System Design for Photovoltaic Applications,” in Proc. IEEE Workshop on Control and Modeling for Power Electron., June 2018, pp. 1-8.

Katherine A. Kim, Hoejeong Jeong, and Yu-Chen Liu, “Perspective on Developing Educational Lecture Videos for Power Electronics Courses,” in Proc. IEEE Workshop on Control and Modeling for Power Electron., July 2017, pp. 1-6.

Hoejeong Jeong and Katherine A. Kim, “GaN Boost Converter Development for High Power Density,” in Proc. KIPE Power Electronics Annual Conf., July 2017, pp. 225-226.

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Hyeun-Tae Cho (조현태) – M.S.

Hyeun-Tae Cho received the B.S degree in ECE in 2016 and M.S. degree in ECE in 2018 from the Electrical and Computer Ulsan National Institute of Science and Technology (UNIST). His main research interests are power factor correction (PFC) converter design and analysis. His extra activities are listening to music and E-sports.

Papers:

Hyeun-Tae Cho, Yu-Chen Liu and Katherine A. Kim, “Short-Primary Linear Induction Motor Modeling with End Effects for Electric Transportation Systems,” in Proc. IEEE International Symposium on Computer Consumer and Control, Dec. 2018, pp. 1-4.

Hoejeong Jeong, Hyeun-Tae Cho, Taewon Kim, Yu-Chen Liu and Katherine A. Kim, “A Scalable Unit Differential Power Processing System Design for Photovoltaic Applications,” in Proc. IEEE Workshop on Control and Modeling for Power Electron., June 2018, pp. 1-8.

Hyeun-Tae Cho, Jingook Kim, Jeehoon Jung and Katherine A. Kim, “Comparison of Input Power Factor Correction Techniques for Buck Converters in Single-Phase Wireless Power Transfer Systems,” in Proc. Workshop on Emerging Technologies Wireless Power, June 2015.

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Kyoungjun Kwon (권경준) – M.S.

Kyoungjun Kwon received the Bachelor of Science degree from Pusan National University in 2016. He majored in electrical engineering. He received the Masters of Science degree in electrical and computer engineering from Ulsan National Institute of Science and Technology (UNIST) in February 2018. He is currently an Engineer at LG in Korea. His research interests are DC-DC converters and inverters for photovoltaic Applications.

Papers:

Kwabena Opoku Bempah, Kyoungjun Kwon and Katherine A. Kim, “Experimental Study of Photovoltaic Panel Mounting Configurations for Tube-Shaped Structures,” Applied Energy, vol. 240, pp. 754-765, April 2019.

Kyoungjun Kwon, Junyoung Yeom and Katherine A. Kim, “Photovoltaic Panel Configuration Study for Tube-Enclosed Transportation Systems,” in Proc. Int. Future Energy Electronics Conf., June 2017, pp. 1-6.

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Xuan Hung Mai – M.S.

Xuan Hung Mai completed his Bachelor of Science degree in Electrical and Computer Engineer (ECE) from Ho Chi Minh University of Technology, Vietnam in 2014. His senior thesis was on a maximum power point tracking algorithm for partial shading conditions in photovoltaic (PV) panels. He received the Masters of Science degree in ECE from Ulsan National Institute of Science and Technology (UNIST) in February 2017. He is currently a Hardware Developer at SolarBK, Vietnam. His research interests are photovoltaic system performance and fault detection, specifically, hot spot detection method in commercialized PV panels.

Papers:

Xuan Hung Mai, Sang-Kyu Kwak, Jee-Hoon Jung, and Katherine A. Kim, “Comprehensive Electric-Thermal Photovoltaic Modeling for Power-Hardware-in-the-Loop Simulation (PHILS) Applications,” IEEE Trans. Industrial Electron., vol. 64, no. 8, pp. 6255-6264, Aug. 2017.

Xuan Hung Mai, Jee-Hoon Jung, and Katherine A. Kim, “Electric-Thermal Photovoltaic Model Characteristics Validation,” in Proc. Int. Conf. on Sustainable Energy Technologies, Nov. 2016, pp. 208-213.

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Hyunji Lee (이현지) – M.S.

Hyunji Lee received the B.S. and M.S. degrees in electrical engineering from the Ulsan National Institute of Science and Technology, Ulsan, South Korea, in 2015 and 2017, respectively. She is working as an Assistant Engineer with Fine Inc., Seoul, South Korea. Her research interests include design and analysis of differential power processing systems for photovoltaic applications.

ORCID: 0000-0002-0265-1902

Papers:

Tae Won Kim, Tae Joon Park, Katherine A. Kim, and Hyunji Lee. “Apparatus for control photovoltaic power generation (태양광 발전 제어 장치),” Korea Patent 10-2019-0078018 , July 4, 2019.

Hoejeong Jeong, Hyunji Lee, Yu-Chen Liu and Katherine A. Kim, “Review of Differential Power Processing Converter Techniques for Photovoltaic Applications,” IEEE Transactions on Energy Conversion, vol. 34, no. 1, pp. 351-360, Mar. 2019.

Hyunji Lee and Katherine A. Kim, “Design Considerations for Parallel Differential Power Processing Converters in a Photovoltaic-Powered Wearable Application,” Energies, vol. 11, no. 12, pp. 1-17, Nov. 2018, art. no. 3329.

Young-Tae Jeon, Hyunji Lee, Katherine A. Kim, and Joung-Hu Park, “Least Power Point Tracking Method for Photovoltaic Differential Power Processing Systems,” IEEE Trans. Power Electron., vol. 32, no. 3, pp. 1941-1951, Mar. 2017.

Hyunji Lee and Katherine A. Kim, “Differential Power Processing Converter Design for Photovoltaic Wearable Applications,” in Proc. Int. Power Electronics and Motion Control Conf., May 2016, pp. 463-468.

Hyunji Lee and Katherine A. Kim, “Comparison of Photovoltaic Converter Configurations for Wearable Applications,” in Proc. IEEE Workshop on Control and Modeling for Power Electron., July 2015, pp. 1-6.