ICCCAS 2024 Invited Speaker

Kimihiro Nishijima

Sojo University, Japan

Biography: Kimihiro Nishijima received the B.E., M.E., and Ph.D. degrees in Electronics Engineering from Sojo University (formerly known as Kumamoto Institute of Technology) in 1997, 1999, and 2003, respectively.
He served as an assistant professor at the Department of Electrical and Electronic Engineering, Faculty of Engineering, Oita University until 2018. From 2018 to 2023, he held the position of associate professor at the Department of Information Engineering, Sojo University, Kumamoto. He is currently a professor at the same university.
His research interests include SMPS (Switching Mode Power Supply) and battery management circuits. He is a member of IEEE, IEICE, and IEEJ.
Speech Title: Novel Power Supply Technologies for Solar-Powered Vehicle and USB-PD Charger
Abstract: In this presentation, two novel methods related to switching power supplies are presented. One of them is an automotive solar power generation system resistant to partial shadows while driving. To extract maximum power from PV panels even in partial shadows, the proposed system consists of an isolated converter like an ideal transformer and an MPPT converter attached to each divided PV panel. The other of them is a very small 65W USB-PD charger using with an input active clamp technology. To reduce the rated voltages of an input smoothing capacitor and power devices, an active switch is added to clamp the input voltage to 140V, even at 240V outlets.