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High-switching-frequency operation is essential for reducing the size and weight of LC filters in medium-voltage power converters. In this work, hybrid pairs of 6 kV SiC-PiN diodes and 4.5 kV Si-IEGTs have been applied to realize the high-switching-frequency operation. A gate-driving technique with an extremely low gate resistance called hard gate driving is employed for low switching losses of the...
This paper has quantitatively investigated the operation frequency limitation of high voltage NPC 3-level converter with 4.5 kV Si-IEGT and 5 kV SiC-PiN diode hybrid pair. In order to investigate the limitation, the high speed switching capability of the hybrid pair under a hard drive condition is evaluated, and an exact power loss estimation method is proposed to estimate the power losses of NPC...
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