A&DS Co., Ltd. mainly develops power conversion devices and researches and develops various converters and inverters. It has experience developing OBC (On-board Charger) for Automotive, the Home-PCS (Power Conditioning System), the Fast DC battery charger and etc. Its strength is the experience of developing HVDC simulator. The simulator has been delivered to Lehigh University in the United States and Korea Electric Power Research Institute. In addition, A&DS is carrying out the Korean government's tasks. It is developing and supplying various power conversion devices according to customers' needs.