The importance of grid-connected DC/DC converters increases due to the increase of electric vehicles and renewable energy. The need for bidirectional power transmission in grid-connected DC/DC converters is also growing. Accordingly, EECL conducts various studies to reduce the size, increase power density, and increase the efficiency of grid-connected bidirectional DC/DC converters.
In particular, we are researching modular high-frequency capacitive-coupled DC/DC converters that can achieve high efficiency, miniaturization, and weight reduction at a low cost compared to the existing inductive-coupled converters. Inductive-coupled converters which utilize magnetic materials such as transformers to transmit power to and from the grid through a magnetic field have limited efficiency and power density due to the energy density and loss of magnetic elements. Capacitive-coupled converters solve this problem using capacitive components such as capacitors to transmit power to and from the grid through the electric field.
