Sang-Hyeok Lee received a PhD in electrical engineering from Chonnam National University, GwangJu, South Korea, in 2012. From 2016 to 2022 he was deputy general manager with the Future Technology Research Laboratory, KyungShin, Korea. He is currently a principal researcher with the Smart Electrics Research Center, Korea Electronics Technology Institute. His current research interests are mobility power conversion systems and high-power EV chargers.