DBD (dielectric barrier discharge) high-frequency bipolar nanosecond pulse generator based on magnetic compression

Abstract

The invention discloses a DBD (dielectric barrier discharge) high-frequency bipolar nanosecond pulse generator based on magnetic compression, which comprises a power supply system, a solid state switch system, a control circuit and a magnetic pulse compression system. According to the DBD high-frequency bipolar nanosecond pulse generator based on magnetic compression, actually, a saturable inductor is used to compress pulse voltage, the rising edge of voltage waves is thus improved, and in order to improve the working frequency of the generator, a full-bridge inverter circuit is used to generate bipolar pulses, and a magnetic core reset circuit can be saved. A test result shows that through the bipolar magnetic compression system, the nanosecond pulse voltage outputted at two ends of a load has the following parameters: adjustable amplitude between 5 to 13 kV, the rising edge around 100 ns, and the repeated frequency as high as several kHz.

Description

technical field [0001] The invention relates to the technical field of plasma discharge, and specifically designs a DBD high-frequency bipolar nanosecond pulse generator based on magnetic pulse compression. Background technique [0002] In recent years, atmospheric pressure non-equilibrium plasma has received more and more attention because of its unique advantages. Because it is a low-temperature plasma that discharges in the surrounding atmosphere, it makes the applications that were difficult to realize, such as biomedicine; The cost is greatly reduced, and one of the very important applications is the surface modification of materials. [0003] DBD (dielectric barrier discharge) plasma is of great industrial application value because of its ability to generate large-area uniform glow discharge or Townsend discharge under atmospheric pressure. Its final application effect is closely related to the plasma characteristics, and the plasma characteristics are mainly determi...

AI Technical Summary

Problems solved by technology

However, the application of the above-mentioned magnetic compression system to DBD plasma discharge has the following disadvantages: ①The frequency is usually not high

Limited by the reset of the magnetic switch or the low-voltage control switch, usually the operating frequency of these magnetic compression systems is not high, basically below 1-2kHz, but the current research on DBD discharge at high frequencies is not systematic enough

②The magnetic compression system studied above generally works under the condition of unipolarity, but the research shows that the discharge process of DBD under bipolar pulse voltage is obviously different from that of unipolar

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