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1、摘要等离子体是物质存在（固、液、气体）的第四种状态，是由大量带电粒子组成的非束缚状态的宏观体系。日常生活中也随处可见，闪电、霓虹、曰光、等离子体电视等都是人们日常能感受得到的等离子体技术。“等离子体”这门近代物理学始创于二十世纪五十年代，作为迅速发展的新兴学科其低温等离子体、冷等离子体、热等离子体技术已广泛应用于医学、电子、工业、军事及日常生活等众多领域。低温等离子体作为一种高新技术，因其对环保及医学方面的突出贡献，己越来越受到国内外专家学者的关注。等离子电手术刀也应运而生。低温等离子消融技术也因此备受关注，与传统的手术相比，低温等离子消融技术有着微创、精确、方便、安全等特点。现在鼻
2、炎、扁桃体、腺样体、咽喉等疾病得到了广泛的应用。本设计旨在通过制作基于MOSFET半桥逆变的高频高压电源以特100kHz超低频率电能激发介质（Nacl）产生等离子体。在40-70°C蛋白质可逆变性的温度范围内，靠“等离子体”产生的声波打断分子键，将蛋白质等生物大分子直接裂解成02,CO2,N2等气体，从而以“微创”的代价完成对组织切割、打孔、消融、皱缩和止血等多种功能。关键字：低温等离子；UC3842；UC3825；MOSFET半桥逆变AbstractPlasmaisexistingmaterial(solid,liquid,gas)ofthefourthstate,ismadeof
3、anumberofchargedparticlesoftheboundthemacroscopicsystemofthestate.Thereareeverywhereindailylife,lightning,neon,thesun,andplasmaTV.Thisispeopledailycanfeelofplasmatechnology."Plasma^thedoorofthemodemphysics,asarapiddevelopmentofemergingdisciplineinthe1950s,thelowtemperatureplasma,coldplasma,hotp
4、lasmatechnologyhasbeenwidelyusedinmedicine,electronics,industrial,militaryanddailylifeandmanyotherfields.Lowtemperatureplasmaasakindofnewandhightechnology,becauseoftheenvironmentalprotectionandthecontributionofthemedicine,alreadymoreandmoregettheattentionofexpertsandscholarsathomeandabroad・Plas
5、maelectricityascalpelalsoarisesatthehistoricmoment.Lowtemperatureplasmaablationtechnologyalsogotmoreattention.Comparedwithtraditionalsurgery,lowtemperatureplasmaablationtechnologyhasthecharacteristicofaccurateandconvenientwithminimallyinvasive,securityandsoon.Nowthewiderangeofapplicationsinrhin
6、itis,tonsil,adenoid,throatandotherdiseases,ThedesignaimstomakebasedonMOSFEThalf-bridgeconverterofthehighfrequency,highvoltagepowersupplyincertainlowfrequencypower100KHzstimulatemedium(Nacl)produceplasma.In40〜70°Cproteinreversibledegenerationofthetemperaturerange,By"plasma”generatedthesoundwaves
7、tobreakmolecularbonds,proteinsandotherbiologicalmacromoleculestodirectcleavageinto02,CO2,N2andothergasesThuswithnminimallyinvasive”pricetocompletetheorganizationalcutting,drilling,ablation,shrinkageandbleedingandotherfeatures.Keyw
