| Abstract |
Series connection of power switching semiconductor elements is essential when a high voltage static power converter is made, so researches are being conducted to further develop this technology. In the series connection of power switching semiconductor elements, the main problem is that simultaneous conduction at turn-on and simultaneous blocking at turn-off together with voltage balancing are unattainable because of the difference of their switching chatacteristics. In this paper, a novel series connection algorithm is proposed, which can implement not only the synchronization of the points of turn-on and turn-off time, but the dynamic voltage balancing in spite of the difference of switching characteristics. The presented method is that the compensated control signal is attained from the voltage feedback signal and applied to the series connected power semiconductors independently, and computer simulation and experimental results verify its validity. |
