电瓷避雷器Issue(4)：40-48,9.DOI:10.16188/j.isa.1003-8337.2025.04.006
航空供电系统用氧化锌压敏电阻多重雷电冲击老化及失效特性研究
Multiple Lightning Impulse Aging and Failure Characteristics of Zinc Oxide Varistors in Aviation Power Supply System
李宣健楠 1方子欣 2李浩然 1余佳豪 1孙晋茹2
作者信息
- 1. 西安高压电器研究院股份有限公司,西安 710077
- 2. 西安交通大学,西安 710049
- 折叠
摘要
Abstract
The performance of zinc oxide varistors will gradually deteriorate under repeated overvoltages,which may ultimately lead to short circuits,fires,or explosions.It is urgent to conduct in-depth re-search on their impulse aging characteristics and failure mechanisms.An experimental platform for re-peated impulse current testing of ZnO varistors is established to investigate the degradation characteristics of ZnO resistors in terms of varistor voltage,impulse residual voltage and leakage current.The results show that the impulse aging life decreases significantly with the increase of impulse density,which is due to the increase of microscopic defects caused by the size effect of the resistor sheet.In addition,the im-pulse intervalunder different current amplitude conditions also has a significant effect on the aging process,and longer impulse interval mitigates the damage of grain and grain boundary structure from pro-longing the impulse life.The research provides theoretical support and experimental basis for the formula-tion optimization,manufacturing process improvement and performance enhancement of varistors.关键词
ZnO压敏电阻/冲击老化/冲击密度/冲击间隔/老化特性Key words
ZnO varistor/impulse aging/impulse density/impulse interval/aging characteristics引用本文复制引用
李宣健楠,方子欣,李浩然,余佳豪,孙晋茹..航空供电系统用氧化锌压敏电阻多重雷电冲击老化及失效特性研究[J].电瓷避雷器,2025,(4):40-48,9.
