1. 3 5 1 is 3 8 IGBT 2 6 2 1 3 4 DC AC 1 31 41 1994 MODELS400 3 http wwwrirf japan comyjpyogo htm DC AC 2. 1GBT MOSFET IGBT4 NII II ON OFF pe 1 3 9 2 IGBT 1 IGBT 4 OFF Flyback 2 a b a b 2 3. DC AC Tomoaki Adach Electronnc and Optical Systems Lab Dept of Electrical and Electronic Engineering Setsunan Univ 1 DC AC DC AC MODEL 3400 2 MODEL S400 MODEL 5400 2 4 i se 2 3