Deog-Ho Lee, Ye-Ji Kim, Seok-Min Kim, and Kyo-Beum Lee, "Reducing Overshoot Voltage of SiC MOSFET in Grid-Connected Hybrid Active NPC Inverters," The Transactions of the Korean Institute of Power Electronics, vol. 24, no. 6, pp. 459–462, Dec. 2019. > Paper

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Domestic Journals Deog-Ho Lee, Ye-Ji Kim, Seok-Min Kim, and Kyo-Beum Lee, "Reducing Overshoot Voltage of SiC MOSFET in Grid-Connected Hybrid Active NPC Inverters," The Transactions of the Korean Institute of Power Electronics, vol. 24, no. 6, pp. 459–462, Dec. 2019.

2019

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This work presents methods for reducing overshoot voltages across the drain-source of silicon carbide (SiC) MOSFETs in grid-

connected hybrid active neutral-point-clamped (ANPC) inverters. Compared with 3-level NPC-type inverter, the hybrid ANPC inverter

can realize the high efficiency. However, SiC MOSFETs conduct its switching operation at high frequencies, which cause high

overshoot voltages in such devices. These overshoot voltages should be reduced because they may damage switching devices and

result in electromagnetic interference (EMI). Two major strategies are used to reduce the overshoot voltages, namely, adjusting the

gate resistor and using a snubber capacitor. In this paper, advantages and disadvantages of these methods will be discussed. The

effectiveness of these strategies is verified by experimental results. 

 

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