EECL is conducting research on high-frequency DC/AC and DC/DC converters using SiC or GaN switches, which are next-generation wide bandgap devices. Increasing the converter drive frequency to several tens of MHz can reduce the size of passive components such as inductors and capacitors that occupy most of the converter's total volume, thereby improving the converter's power density. In the case of an inductor, an air core type inductor can be used, and the iron loss component can also be eliminated.
Soft switching techniques to reduce switching losses and reduce noise effects must be applied to the control and design of high frequency converters. EECL is conducting research on soft switching condition analysis, design method, and control method according to load operating point for various high-frequency power circuit topologies.
High frequency converters are used in a variety of applications such as wireless mobile phone chargers and plasma systems in semiconductor processes.
