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Related Experiment Videos

A 800 kV compact peaking capacitor for nanosecond generator.

Wei Jia1, Zhiqiang Chen2, Junping Tang2

  • 1School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.

The Review of Scientific Instruments
|October 3, 2014
PubMed
Summary

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A novel, compact high voltage peaking capacitor was developed for pulsed power applications. This device significantly reduces voltage pulse rise times, enhancing electromagnetic pulse simulator performance.

Area of Science:

  • Electrical Engineering
  • Pulsed Power Technology

Background:

  • High voltage pulse generation requires specialized components for precise waveform shaping.
  • Existing peaking capacitors often face limitations in size, inductance, and operational stability.

Purpose of the Study:

  • To develop an extremely compact high voltage peaking capacitor.
  • To enhance mechanical stability and reliability under extreme operating conditions.
  • To improve the performance of electromagnetic pulse simulators.

Main Methods:

  • Designed a pancake-structured capacitor with specific dimensions (315 mm diameter, 59 mm thickness, 6.1 kg mass).
  • Utilized a novel structural design for enhanced mechanical stability and reliability.
  • Conducted electrical experiments to test performance under high-voltage pulses (up to 800 kV) and high internal pressure (1.5 MPa).

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Main Results:

  • Achieved a self-inductance close to 17 nH.
  • Demonstrated capability to withstand high-voltage pulses with ~20 ns rise time and ~25 ns half-width.
  • Successfully reduced voltage pulse rise time from 20 ns to under 3 ns when used in an electromagnetic pulse simulator.
  • Deduced practical inductance value of no more than 25 nH from experimental data.

Conclusions:

  • The developed compact peaking capacitor offers superior performance and reliability for high-voltage pulsed power systems.
  • Its novel design enables significant improvements in voltage pulse shaping, particularly for electromagnetic pulse simulation.
  • The capacitor's low inductance and high operational stability make it a valuable component for demanding applications.