Effect of power supply parameters on discharge characteristics and sterilization efficiency of magnetically driven rotating gliding arc  

作　　者：Shaohua QIN Meizhi WANG Jun DU Lanlan NIE Jie PAN 秦绍华;王玫芝;杜军;聂兰兰;潘杰(School of Physics and Electronics,Shandong Normal University,Jinan 250014,People’s Republic of China;School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,People’s Republic of China)

机构地区：[1]School of Physics and Electronics,Shandong Normal University,Jinan 250014,People’s Republic of China [2]School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第9期61-68,共8页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.52077129 and 52277150);the Natural Science Foundation of Shandong Province(No.ZR2022ME037).

摘　　要：Plasma sterilization is a new generation of high-tech sterilization method that is fast,safe,and pollution free.It is widely used in medical,food,and environmental protection fields.Home air sterilization is an emerging field of plasma application,which puts higher requirements on the miniaturization,operational stability,and operating cost of plasma device.In this study,a novel magnetically driven rotating gliding arc(MDRGA)discharge device was used to sterilize Lactobacillus fermentation.Compared with the traditional gas-driven gliding arc,this device has a simple structure and a more stable gliding arc.Simulation using COMSOL Multiphysics showed that adding permanent magnets can form a stable magnetic field,which is conducive to the formation of gliding arcs.Experiments on the discharge performance,ozone concentration,and sterilization effect were conducted using different power supply parameters.The results revealed that the MDRGA process can be divided into three stages:starting,gliding,and extinguishing.Appropriate voltage was the key factor for stable arc gliding,and both high and low voltages were not conducive to stable arc gliding and ozone production.In this experimental setup,the sterilization effect was the best at 6.6 kV.A high modulation duty ratio was beneficial for achieving stable arc gliding.However,when the duty ratio exceeded a certain value,the improvement in the sterilization effect was slow.Therefore,considering the sterilization effect and energy factors comprehensively,we chose 80%as the optimal modulation duty ratio for this experimental device.

关 键 词：PLASMA magnetically driven rotating gliding arc STERILIZATION 

分 类 号：O539[理学—等离子体物理]