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Bridge rectifier01:24

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The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
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An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
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Thyristor stack for pulsed inductive plasma generation.

C Teske1, J Jacoby, W Schweizer

  • 1Plasmaphysics Group, Institute of Applied Physics, Johann-Wolfgang-Goethe University, 60438 Frankfurt am Main, Germany.

The Review of Scientific Instruments
|April 2, 2009
PubMed
Summary
This summary is machine-generated.

A novel thyristor stack enables efficient pulsed inductive plasma generation. This system achieves high power transfer and fast current switching for advanced plasma applications.

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Area of Science:

  • Electrical Engineering
  • Plasma Physics
  • Pulsed Power Systems

Background:

  • Pulsed inductive plasma generation requires robust switching components capable of handling high dI/dt.
  • Existing thyristor technologies may face limitations in triggering reliability and energy transfer efficiency for demanding applications.

Purpose of the Study:

  • To develop and evaluate a novel thyristor stack specifically designed for pulsed inductive plasma generation.
  • To assess the performance characteristics, including triggering, current reversal, and power transfer efficiency, of the developed thyristor stack.

Main Methods:

  • Designed a thyristor stack incorporating a free-wheeling diode assembly for current reversal.
  • Implemented a high-side biased, self-supplied gate driver unit for reliable triggering using local snubber network energy.
  • Utilized a single fiber optic command for simultaneous thyristor turn-on, switching a 30 kHz series resonant circuit.

Main Results:

  • Achieved a maximum power transfer efficiency of 84% and peak power of 480 kW.
  • Generated inductive plasma with a pulse duration of 120 microseconds and pulse energy of 50 J.
  • Demonstrated a peak current of 5 kA and a current switching rate of 1 kA/microsecond with an inductive load.

Conclusions:

  • The developed thyristor stack provides a reliable and efficient solution for pulsed inductive plasma generation.
  • The system's design ensures hard firing gate pulses suitable for high dI/dt requirements.
  • The achieved performance metrics highlight the potential of this technology for various plasma-based applications.