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A compact bipolar pulse-forming network-Marx generator based on pulse transformers.

Huibo Zhang1, Jianhua Yang, Jiajin Lin

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The Review of Scientific Instruments
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This study presents a compact pulse-forming network (PFN)-Marx generator using pulse transformers for efficient high-voltage pulse generation. The novel design achieves 100 kV pulses with a fast rise time, ideal for demanding applications.

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Area of Science:

  • Electrical Engineering
  • Pulsed Power Systems

Background:

  • High-voltage pulse generation is critical for various scientific and industrial applications.
  • Traditional Marx generators often face challenges with size, parasitic inductance, and switch reliability.

Purpose of the Study:

  • To develop a compact bipolar pulse-forming network (PFN)-Marx generator with enhanced performance.
  • To investigate the efficacy of pulse transformers in improving capacitor withstand voltage and reducing switch count.

Main Methods:

  • The generator design incorporates two sets of pulse transformers and 6 stages of PFNs with ceramic capacitors.
  • A bipolar pulse charging scheme was implemented to enhance capacitor voltage handling.
  • The PFN-Marx structure was optimized for compactness to minimize parasitic inductance.

Main Results:

  • The compact PFN-Marx generator delivered a 100 kV pulse into a 48 Ω load with a charging voltage of 35 kV.
  • The output pulse exhibited a full width at half maximum (FWHM) of 173 ns.
  • A rapid rise time of less than 15 ns was achieved.

Conclusions:

  • The pulse transformer-based bipolar PFN-Marx generator offers a compact and efficient solution for high-voltage pulse generation.
  • The design successfully increased capacitor withstand voltage and reduced the number of gas gap switches.
  • The achieved pulse parameters are suitable for applications requiring fast, high-amplitude voltage pulses.