Magnetic control type tapered needle array diffuse discharge system in atmospheric pressure air

A tapered needle, atmospheric pressure technology, applied in the direction of electrical components, plasma, etc., can solve the problems of filamentary discharge, short discharge air gap distance, small discharge area, etc., achieve sufficient air ionization, uniform discharge, and inhibit the speed of movement Effect

Inactive Publication Date: 2017-03-01
吴勇峰
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] At present, the diffuse discharge generated by these methods in atmospheric pressure air has problems such a

Method used

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  • Magnetic control type tapered needle array diffuse discharge system in atmospheric pressure air

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Embodiment

[0026] In an embodiment, the experimental device can be divided into three parts: a power source 1 , a discharge gas chamber 6 , and a measuring device 7 . The high-voltage DC power supply 1 generates a DC voltage of 0-30kV, and the output power is 2kW; the discharge gas chamber 6 is made of plexiglass, and its size is 10×10×5cm. There are four air holes with a diameter of 1cm on the wall of the gas chamber, so that the gas chamber The inner air is connected with the outer air, and the conical needle array 3 discharge electrode is placed in the center of the air chamber; a ring-shaped permanent magnet 4 is installed under the negative electrode to avoid the rapid growth of electron avalanche, thereby inhibiting the development of the discharge to arc discharge and making the discharge last proceed steadily. The measurement system includes current and voltage measurement as well as the capture of discharge images. The current measurement method is to connect a 50Ω non-inductiv...

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Abstract

The invention discloses a magnetic control type tapered needle array diffuse discharge system in the atmospheric pressure air, which comprises a power supply (1), a discharge air chamber (6) and a measuring device (7), wherein the center of the discharge air chamber (6) is provided with a tapered needle array (3), and the tampered needle array (3) is connected with a positive electrode of the power supply (1) through a wire; the lower end, which is opposite to the tapered needle array (3), of the discharge air chamber (6) is provided with a permanent magnet (4); the measuring device is provided with a voltage measuring terminal CH2 and a current measuring terminal CH1, the voltage measuring terminal CH2 is connected with the positive electrode of the power supply (1) through a high-voltage probe (5), and the current measuring terminal CH1 is connected with the permanent magnet (4) through a wire; and a negative electrode of the power supply (1) and the measuring device (7) are connected with a grounding terminal together. The system disclosed by the invention adopts the high-voltage DC power supply, thereby being capable of providing stable and persistent current so as to acquire diffuse discharge in the atmospheric pressure air.

Description

technical field [0001] The invention relates to a discharge system for obtaining large-area, uniform and stable diffuse discharge in atmospheric pressure air, belonging to the field of plasma discharge, in particular to a magnetically controlled conical needle array diffuse discharge system in atmospheric pressure air. Background technique [0002] There are various forms of gas discharge under atmospheric pressure conditions, such as corona, glow, arc and so on. Among them, the corona discharge only occurs in the area near the small curvature electrode, the discharge is weak and the efficiency of generating active particles is low; on the contrary, the arc discharge energy density is too high, it is easy to damage the surface of the material, and it is difficult to uniformly treat the workpiece surface; and the glow discharge power density It is moderate and can produce uniform low-temperature plasma, so it has always been a research hotspot. However, glow discharge is ver...

Claims

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Application Information

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IPC IPC(8): H05H1/00H05H1/24
Inventor 吴勇峰徐英花
Owner 吴勇峰
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