A Diode-Free MOV2-RC Snubber for Solid-State Circuit Breaker

Shuyan Zhao, Reza Kheirollahi, Yao Wang, Hua Zhang, Fei Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publication2022 IEEE Transportation Electrification Conference and Expo, ITEC 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages497-502
Number of pages6
ISBN (Electronic)9781665405607
DOIs
StatePublished - 2022
Externally publishedYes
Event2022 IEEE Transportation Electrification Conference and Expo, ITEC 2022 - Anaheim, United States
Duration: Jun 15 2022Jun 17 2022

Publication series

Name2022 IEEE Transportation Electrification Conference and Expo, ITEC 2022

Conference

Conference2022 IEEE Transportation Electrification Conference and Expo, ITEC 2022
Country/TerritoryUnited States
CityAnaheim
Period6/15/226/17/22

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Transportation

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