电瓷避雷器Issue(1)：25-32,42,9.DOI:10.16188/j.isa.1003-8337.2025.01.004
铁磁谐振下动车组电压互感器温升特性研究
Temperature Rise Characteristics of Voltage Transformer of EMU Under Ferromagnetic Resonance
摘要
Abstract
When the EMU is out of phase,the on-board voltage transformer is prone to ferromagnetic resonance,which may even cause the transformer to crack and damage,threatening the driving safety.Based on the actual parameters of voltage transformer of a type of EMU,the equivalent three-dimension-al model of voltage transformer of EMU is established.Based on the principle of heat transfer,the equiv-alent heat transfer coefficient and equivalent specific heat capacity are calculated and analyzed based on the multi-layer cylinder wall model.The excitation characteristic curve of voltage transformer of EMU is measured by experiment,combined with the excitation characteristic curve of voltage transformer of EMU and actual working conditions,the heating power of winding and iron core in case of ferromagnetic reso-nance is calculated.Through the thermal simulation of the voltage transformer of the EMU,the tempera-ture field of the voltage transformer of the EMU is obtained,and the temperature rise of the voltage trans-former of the EMU in the case of ferromagnetic resonance is studied.Combined with the actual situation and the thermal insulation design standard of the voltage transformer of the EMU,the damage reason of the voltage transformer of the EMU is analyzed.关键词
动车组电压互感器/铁磁谐振/等效热传导系数/热仿真/温度场Key words
voltage transformer of EMU/ferromagnetic resonance/equivalent thermal conductivity/thermal simulation/temperature field引用本文复制引用
朱蕴奇,王庆峰,李相强,张健穹..铁磁谐振下动车组电压互感器温升特性研究[J].电瓷避雷器,2025,(1):25-32,42,9.基金项目
四川省科技厅重点研发项目(编号:22ZDYF3070) （编号:22ZDYF3070）
四川省科技厅重点研发项目(编号:22ZDYF3091).Project supported by Key R&D Projects of Sichuan Provincial Department of Science and Technology(No.22ZDYF3070) （编号:22ZDYF3091）
Key R&D Projects of Sichuan Provincial Department of Science and Technology(No.22ZDYF3091). （No.22ZDYF3091）
