TY - GEN
T1 - A Diode-Free MOV2-RC Snubber for Solid-State Circuit Breaker
AU - Zhao, Shuyan
AU - Kheirollahi, Reza
AU - Wang, Yao
AU - Zhang, Hua
AU - Lu, Fei
N1 - Funding Information:
The information, data, or work presented herein was funded in part by the Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy, under Award Number DE-AR0001114 in the BREAKERS program monitored by Dr. Isik Kizilyalli. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - This paper presents a diode-free double metal oxide varistor-resistor-capacitor (MOV2-RC) snubber to provide overvoltage protection in dc solid-state circuit breakers (dc SSCBs). MOV2-RC snubber is introduced and investigated for SSCBs application. The proposed MOV2-RC snubber prevents voltage overshoot and ensures smooth turn-off voltage slew rate of SSCBs. Meanwhile, compared with conventional MOV-resistor-capacitor-diode (MOV-RCD) snubber, utilization of a low-voltage MOV (LMOV) to replace the diode avoids the influence of availability issue of state-of-the-art SiC Schottky diode raised by global power semiconductor shortage due to coronavirus disease 2019 (COVID-19). It also reduces the cost of snubber circuit for SSCBs. Working principles and design procedures of the MOV2-RC snubber are presented. The effectiveness of the proposed snubber circuit is verified by experiments with a 400V/140A dc SSCB prototype. The experimental results show the clamping voltage of 1.1 kV and turn-off dv/dt of 7.9 V/ns. The key component of MOV2-RC snubber (LMOV) has 30 times lower cost and 3 times better availability compared to MOV-RCD-based counterpart.
AB - This paper presents a diode-free double metal oxide varistor-resistor-capacitor (MOV2-RC) snubber to provide overvoltage protection in dc solid-state circuit breakers (dc SSCBs). MOV2-RC snubber is introduced and investigated for SSCBs application. The proposed MOV2-RC snubber prevents voltage overshoot and ensures smooth turn-off voltage slew rate of SSCBs. Meanwhile, compared with conventional MOV-resistor-capacitor-diode (MOV-RCD) snubber, utilization of a low-voltage MOV (LMOV) to replace the diode avoids the influence of availability issue of state-of-the-art SiC Schottky diode raised by global power semiconductor shortage due to coronavirus disease 2019 (COVID-19). It also reduces the cost of snubber circuit for SSCBs. Working principles and design procedures of the MOV2-RC snubber are presented. The effectiveness of the proposed snubber circuit is verified by experiments with a 400V/140A dc SSCB prototype. The experimental results show the clamping voltage of 1.1 kV and turn-off dv/dt of 7.9 V/ns. The key component of MOV2-RC snubber (LMOV) has 30 times lower cost and 3 times better availability compared to MOV-RCD-based counterpart.
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U2 - 10.1109/ITEC53557.2022.9813936
DO - 10.1109/ITEC53557.2022.9813936
M3 - Conference contribution
AN - SCOPUS:85134692918
T3 - 2022 IEEE Transportation Electrification Conference and Expo, ITEC 2022
SP - 497
EP - 502
BT - 2022 IEEE Transportation Electrification Conference and Expo, ITEC 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE Transportation Electrification Conference and Expo, ITEC 2022
Y2 - 15 June 2022 through 17 June 2022
ER -