A Boost PFC Rectifier with a Passive Lossless Snubber Circuit Using Coupled Inductors Methodes. - Hyeok-Jin Yun; Jong-Hyun Kim; Myung-Hyo Ryu; Hee-Je Kim (ICIRA (2), 2013)

High-voltage input power supply for modular multi-level converter. - Hyeok-Jin Yun; Ho-Sung Kim; Hee-Je Kim (AIM, 2015)