中国电机工程学报2024，Vol.44Issue(5)：2068-2076,封3,10.DOI:10.13334/j.0258-8013.pcsee.230179
重频大电流下金属化膜脉冲电容器温升累积效应研究
Study on Cumulative Effect of Temperature Rise of Metallized Film Pulse Capacitor Under Repeated Frequency and High Current
李长云 1刘超群 1于永进1
作者信息
- 1. 山东科技大学电气与自动化工程学院,山东省 青岛市 266590
- 折叠
摘要
Abstract
Electromagnetic emission technology typically requires a pulsed power supply to have a pulse current with an amplitude of tens of kiloamperes and a pulse width of several milliseconds,and to be capable of continuous emission at a repetition rate.Metallized film capacitors are widely used in pulse power supplies due to their high energy storage density and long life.According to the structure of the pulse capacitor and the working mode of the pulse power supply,this paper first establishes the heat generation and heat dissipation model of the pulse capacitor,then establishes the transient temperature field model in the multiphysics simulation software COMSOL Multiphysics 5.6,and combines with the existing experimental results to verify the validity of the model.The accumulation phenomenon of the internal temperature rise of the metallized film pulse capacitor in the repetitive frequency pulse discharge application is discussed.The calculation results show that under the conditions of pulse discharge peak value of 1kA,ambient temperature of 15℃,and metal film thickness of 4nm,the maximum temperature rise of the pulse capacitor core is 22.9℃after continuous operation for 10 times at a repetition rate of 12 times/min and a time interval of 30s.On this basis,the influence of four factors including ambient temperature,repetition frequency,pulse current peak value and electrode thickness on the temperature rise of the pulse capacitor is analyzed by simulation.The model gives the internal transient heating law of the pulse capacitor under high frequency and high current,which can provide a reference for the reasonable operation and optimal design of the pulse capacitor.关键词
电磁发射/脉冲电容器/重复频率/有限元/累积效应Key words
electromagnetic launch/pulse capacitor/repetition frequency/finite element/cumulative effect分类
信息技术与安全科学引用本文复制引用
李长云,刘超群,于永进..重频大电流下金属化膜脉冲电容器温升累积效应研究[J].中国电机工程学报,2024,44(5):2068-2076,封3,10.
