IEEE Conference: WoW 2015

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. (IEEE Xplore Link)

Students to Compete in 2015 International Future Energy Challenge

A team of four undergraduate student (including PEARS Lab students Hyeun-Tae Cho and Zhanibek Bizak) has been selected to compete in the final competition of the 2015 IEEE International Future Energy Challenge. They are competing in Topic A where they are building a High-Efficiency Wireless Charging System for Electric Vehicles and Other Applications. The team is currently building and testing the wireless charging system in preparation for the final competition at the University of Michigan-Dearborn, MI, USA, in July 2015.

Team members (as shown in the picture) are Zhanibek Bizak, Sangyeong Jeong, Mina Kim, and Hyeun-Tae Cho. Faculty advisors are Prof. Katherine A. Kim, Prof. Jeehoon Jung, and Prof. Jingook Kim.

Outstanding Teaching Award

Prof. Katherine Kim was honored to receive an “Outstanding Teaching Award” from the President of UNIST on March 18, 2015. She taught EE313: Introduction to Control in Fall 2014 and utilized a “flipped-learning” approach with video lectures, which are publicly available on YouTube:

Prof. Kim would like to thank her EE313 students for being very responsive and adaptive to her non-traditional method of teaching, and for giving her excellent feedback on how to further improve the course. She plans to teach the course again in Fall 2015.

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.


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.

Spring 2015 Update

The spring 2015 semester has started at UNIST!


This semester, Prof. Katherine A. Kim is teaching a newly-established graduate course on power systems (based on the previous Special Topics course).

ECE560: Power Systems [전력시스템]
Level: Masters Course
Description: Power Systems is a graduate level course where you will learn the basics of the electric power grid and present-day research challenges in power systems. The primary goal of the course is for students to gain a clear understanding of how the power grid and power systems functions and to be able to communicate that understanding to their peers.

Also, two new M.S. students have joined the PEARS Lab:

Check out their profiles under the People tab.

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


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.

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.

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.

IEEE IAS 2014 Annual Meeting Attendance

Prof. Katherine A. Kim attended the IEEE Industrial Applications Society Annual Meeting on October 5-9, 2014 in Vancouver, Canada.

At the meeting she:

  1. Gave an update on the Student/Young Professional activities as the Student Membership Chair of the IEEE Power Electronics Society
  2. Presented a poster entitled “Hot Spot Prevention Methods for Photovoltaic Systems”
  3. Chaired the “Student Technical Session”

Fall 2014 Update

Katherine A. Kim (김예린) has officially started as an Assistant Professor in the School of Electrical and Computer Engineering at Ulsan National Institute of Science and Technology (UNIST). In Fall 2014, she will be starting up her research lab and teaching the following courses:

EE313: Introduction to Control [자동제어공학개론]
Level: Undergraduate 3rd-year course
Description: This course introduces fundamentals of linear systems control: mathematical modeling, analysis, and design of systems, transfer function, root locus, bode diagram, Nyquist method, and state space method.

ECE637: Special Topics: Power Systems [전자회로설계및응용특수토픽III]
Level: Masters Course
Description: This special topic course on Power Systems is a graduate level course where you will learn the basics of the electric power grid and the challenges of moving towards a more intelligent grid.