Non-thermal plasma pulse power supply

Abstract

The invention relates to a non-thermal plasma pulse power supply, belonging to the technical field of air disinfection and purification. The power supply comprises an EMC filter, a rectification circuit, a filter circuit, a digital control circuit, a pulse generator and a pulse transformer which are electrically connected in sequence. The power supply is characterized in that the output end of the pulse generator is provided with a current detection circuit; the output end of the pulse transformer is connected with an abnormal state protection circuit; pulse clipping circuits are arranged at the two ends of primary coils of the pulse transformer; the pulse transformer is arranged based on a flyback inverter; secondary coils are formed by winding at least two coils by sections and connecting the two coils in series; and the upper end of each coil is provided with a high-voltage fast recovery diode. The power supply is matched with capacitive plasma reactors to operate to generate high concentration plasmas and has advantages of simple structure, small volume, good reliability and low manufacturing cost. The power supply is widely applied to non-thermal plasma air disinfection purifiers.

Description

Technical field: [0001] The invention belongs to the technical field of non-thermal plasma air disinfection and purification, and specifically relates to a non-thermal plasma pulse power supply. Background technique: [0002] At present, for indoor air disinfection and purification under normal temperature and normal pressure, it is a priority to use corona discharge non-thermal plasma air disinfection and purification. There are two core components of the non-thermal plasma air disinfection purifier: the non-thermal plasma reactor and the matched high-voltage power supply. The non-thermal plasma reactor is mainly composed of a metal wire, a serrated or pointed positive electrode and a negative electrode of a metal plate. Under the action of the strong electric field of an external high-voltage power supply, the non-thermal plasma generated opens the gas molecular bonds. Generate monoatomic molecules, negative oxygen ions, OH ions and free oxygen atoms, H 2 O 2 Such as free radi...

AI Technical Summary

Problems solved by technology

[0005] One is that the design of the current non-thermal plasma reactor is unreasonable. The discharge positive electrode that constitutes the non-thermal plasma reactor is made of thin metal wires, although the plasma concentration generated is high, but it is easy to be blown out.

For this reason, most of the positive electrodes are made of stainless steel with a jagged or pointed needle structure, resulting in low plasma concentrations, high concentrations of ozone and nitrogen oxides, and poor disinfection and purification effects.

[0006] The second is that the non-thermal plasma power supply is not very suitable for plasma reactors with capacitive loads.

The disadvantage is that the H full-bridge inverter circuit uses four high-power MOSFETs and is equipped with a computer. It is self-evident that the equipment is complicated and the cost is high.

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