A modified modular multilevel converter topology trigger generator for a pseudospark switch.

Area of Science:

• Electrical Engineering
• Plasma Physics
• High-Voltage Engineering

Background:

• Pseudospark switches are crucial for high-power switching applications.
• Existing trigger generators often face limitations in speed, jitter, and size.
• A need exists for compact, efficient, and precise triggering solutions.

Purpose of the Study:

• To develop a novel, high-performance trigger generator for pseudospark switches.
• To leverage a modified modular multilevel converter (MMC) topology for improved performance.
• To achieve a compact and power-dense trigger generator design.

Main Methods:

• A modified modular multilevel converter (MMC) topology utilizing insulated gate bipolar transistors (IGBTs) was employed.
• The trigger generator was designed for both single-shot and high-repetition rate operation.
• Key performance metrics such as rise time, temporal jitter, output voltage, and pulse duration were characterized.

Main Results:

• The developed trigger generator exhibits a fast rise time and low temporal jitter (< 1 ns).
• It produces 4.5 kV pulses with a 1 µs duration into a 50 Ω load.
• The design minimizes high-voltage components, enhancing power density and reducing overall volume.
• The generator can trigger single or multiple pseudospark gaps without external pulse shaping circuits.

Conclusions:

• The novel MMC-based trigger generator offers a significant advancement in pseudospark switch triggering.
• Its compact size, high power density, and precise triggering capabilities make it suitable for various applications.
• The elimination of the need for pulse shaping circuits simplifies system integration and reduces complexity.