Potential Application of A Liquid Nitrogen Switch in HTS DC Electrical System of Distributed Propulsion Aircrafts

Hongxu Li, Bin Xiang, Dongyu Wang, Muhammad Junaid, Yingsan Geng, Zhiyuan Liu, Jianhua Wang, Xiaoze Pei

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

Abstract

A nearly all-superconducting power system is considered as a promising path to realize Turboelectric distributed propulsion (TeDP) Aircraft. The options of power switches are rather limited and only cryogenic power electronics are into the scope so far. A mechanical switch using LN2 as an arc extinguishing medium (LN2 switch) can be a promising alternative that has lower conduction loss. However, basic research on current interruption in LN2 is still lacking, especially the effect of magnetic fields. The objective of this paper is to understand the effect of the magnetic field on DC current interruption by LN2. Interruptions under different magnetic fields are tested. A two-stage arcing process is observed under the magnetic field. Stage 1 is similar to that in the air while stage 2 is distinguished as interactions between vaporized LN2 and arc. 600 V DC/1 kA is interrupted by LN2 under 62.5 mT successfully. The interruption current is 8 times higher than that of without magnetic field applied. The magnetic field strengthens arc cooling by enhancing arc motion in LN2. Adding no burden to refrigeration, an LN2 switch can be a promising application in HTS electrical system.

Original languageEnglish
Title of host publication2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020
Place of PublicationU. S. A.
PublisherIEEE
ISBN (Electronic)9781728152158
DOIs
Publication statusPublished - 16 Oct 2020
Event2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020 - Virtual, Tianjin, China
Duration: 16 Oct 202018 Oct 2020

Publication series

Name2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020

Conference

Conference2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020
CountryChina
CityVirtual, Tianjin
Period16/10/2018/10/20

Keywords

  • HTS electrical system
  • LN2 Switch
  • Magnetic field
  • TeDP

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Electronic, Optical and Magnetic Materials

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