Journal
IEEE TRANSACTIONS ON PLASMA SCIENCE
Volume 46, Issue 6, Pages 2072-2078Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPS.2018.2837021
Keywords
All solid state; Marx generator; plasma discharges; pulse transformer
Categories
Funding
- National Natural Science Foundation of China [11305273, 11405144]
- Fundamental Research Funds for the Central Universities, China [0213005202054, 20720150022]
- Graduate Research and Innovation Foundation of Chongqing, China [CYS17007]
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In this paper, a compact all-solid-state pulsed power modulator was designed based on Marx generator and pulse transformer. It is consisted of a six-stage Marx generator using power MOSFETs as switches to generate primary voltage pulses and a pulse transformer through a closed magnetic core to boost and convert the polarity of the output high-voltage (HV) pulse. A MOSFET driver circuit based on optical-electrical isolation was designed for controlling the Marx generator. It shows that the output pulse shapes, especially the rising and falling phases, are determined by the design of the pulse transformer such as its leakage inductance, distributed capacitance, magnetization inductance, and step-up ratio. The designed modulator is able to generate HV pulses with amplitude ranging from -35 to 35 kV, repetition frequency up to 10 kHz, minimum pulsewidth 250 ns. Various types of plasma discharges, including air micro-discharge for local treatments, plate-to-plate air dielectric-barrier discharge, underwater discharge, are able to be driven with good reproducibility by this compact pulse modulator.
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