Synchronization Strategy of the Points of Turn-Off Time Using the Miller Effect on Connecting the Semiconductor Devices in Series

전력용 반도체 소자의 직렬연결시 밀러효과를 이용한 소호시점 동기화 전략

This paper describes a novel switching algorithm of series connected power semiconductors for high voltage applications. In order to improve the reliability and efficiency of high voltage static power converters, we study on the switching characteristics of series connected power semiconductors and then propose "a servo control of snubber capacitor value" for the dynamic voltage balancing under turn-off state in series connected power semiconductors. Finally, we illustrate the validity of this algorithm by computer simulation and experimental results.