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Note: A simple feedback control method based on a real time acquisition voltage to avoid second breakdown of PFL.

Y F Qiu1, J L Liu1, J H Yang1

  • 1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan 410073, People's Republic of China.

The Review of Scientific Instruments
|January 3, 2019
PubMed
Summary

This study introduces a feedback control method to prevent pulse forming line (PFL) damage. By monitoring transformer primary capacitor voltage, the system detects and prevents damaging breakdowns, enhancing accelerator reliability.

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Area of Science:

  • Electrical Engineering
  • High Voltage Engineering
  • Plasma Physics

Background:

  • Pulse forming lines (PFLs) are susceptible to damage from repeated breakdowns.
  • Breakdowns in PFLs can lead to serious equipment failure and operational downtime.
  • Existing protection methods may be complex or insufficient for preventing re-breakdowns.

Purpose of the Study:

  • To develop a simple and effective feedback control method to prevent repeated breakdowns in a PFL.
  • To analyze the electrical characteristics of the breakdown circuit.
  • To enhance the operational reliability and longevity of high-voltage accelerators.

Main Methods:

  • Theoretical analysis of the breakdown circuit was performed.
  • A feedback control system was designed using a reverse peak voltage detection method.
  • A comparison function was integrated into the accelerator's control system to monitor voltage thresholds.
  • Experimental validation of the proposed control method was conducted.

Main Results:

  • Theoretical analysis confirmed a significant increase in the reverse peak voltage of the primary capacitor upon breakdown.
  • The feedback control system successfully detected voltage anomalies indicative of breakdown.
  • The implemented system effectively prevented subsequent breakdowns by halting accelerator operation when the voltage threshold was exceeded.
  • Experimental results demonstrated the method's efficacy in preventing PFL re-breakdown.

Conclusions:

  • The presented feedback control method based on reverse peak voltage is a simple yet effective solution for preventing PFL damage.
  • This approach significantly enhances the reliability and safety of high-voltage accelerator systems.
  • The method offers a practical means to avoid costly repairs and maintain operational continuity.