Lifetime characteristics of mica capacitor under microsecond pulse

Liu Shifei; Zhang Jiande; Zhang Zicheng; Zhang Haoran; Qiu Xudong; Liu Zhi; Li Rui

doi:10.11884/HPLPB202537.250210

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Article Navigation > High Power Laser and Particle Beams > 2025 > Accepted Manuscript

Liu Shifei, Zhang Jiande, Zhang Zicheng, et al. Lifetime characteristics of mica capacitor under microsecond pulse[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250210

Citation:

Liu Shifei, Zhang Jiande, Zhang Zicheng, et al. Lifetime characteristics of mica capacitor under microsecond pulse[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250210

Liu Shifei, Zhang Jiande, Zhang Zicheng, et al. Lifetime characteristics of mica capacitor under microsecond pulse[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250210

Citation:

Liu Shifei, Zhang Jiande, Zhang Zicheng, et al. Lifetime characteristics of mica capacitor under microsecond pulse[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250210

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Lifetime characteristics of mica capacitor under microsecond pulse

doi: 10.11884/HPLPB202537.250210

1.
Northwest Institute of Nuclear Technology, Xi’an 710024, China
2.
National University of Defense Technology, Changsha 410073, China

Received Date: 2025-07-14
Accepted Date: 2025-09-27
Rev Recd Date: 2025-10-05

Available Online: 2025-10-14

Abstract

Abstract

Background
In recent years, the development of wound-type mica paper capacitors has significantly enhanced their operating voltage and energy density, and they remain highly reliable, showing potential for improving the overall energy storage density of PFN (pulse forming line)-Marx generators.
Purpose
The lifetime of the capacitor is a crucial factor in ensuring system reliability. The lifetime of the mica paper capacitor reaches up to 100,000 times, meeting the requirements of highly compact pulse power drivers. However, the lifetime characteristics of this capacitor remain unclear, and its optimal operating conditions have not been well-defined.
Methods
In this paper, an investigation into the lifetime characteristics of mica paper capacitors under microsecond pulses is presented. First, the structure of the capacitor is analyzed in detail. Subsequently, numerical simulations of the electrical and thermal fields are carried out to further study its characteristics. To accurately test the mica paper capacitors, a lifetime test platform that can operate stably over an extended period was constructed.
Results
Through the utilization of this platform, the electrical degradation parameters and the failure mechanisms of the mica paper capacitors are obtained and analyzed. Based on the test data, the lifetime empirical model of mica capacitors under given operating conditions is modified.
Conclusions
The results of the experiments and calculations of the lifetime empirical model indicate that the model aligns well with the experimental results. This work contributes to the lifetime prediction of mica capacitor and provides design reference for system devices using mica capacitor under microsecond pulses.
- mica capacitor,
- lifetime characteristic,
- Test platform,
- lifetime prediction,
- lifetime empirical model

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References(22)

References

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