Series connection of IGBT devices can meet the requirements of high-voltage and high-power conversion

but the imbalance of voltage caused by the asynchrony gate drive signals is a key problem of the IGBTs series connection.For realizing the voltage balancing preferably

an active clamping dynamic voltage balancing circuit based on the gate terminal voltage balancing technology for the IGBTs series connection is presented in this paper.It shows fast response

low loss and high reliability

and so on.Then

the effect of active voltage balancing auxiliary circuits for series connected IGBTs is analyzed by the simulation and experiment.Finally

the results show they can not only suppress the imbalance of voltage caused by the asynchrony gate drive signals

but also diminish overvoltage across IGBTs dramatically.It is guaranteed that a circuit including series connected IGBTs can operate safely.