【脉冲大电流长寿命开关的研究】何孟兵.pdf
ADissertationSubmittedinPartialFulfillmentoftheRequirements for theDegreeofDoctorofPhilosophyinEngineering On long life-time high current pulsed power switch Candidate:He Mengbing Major:ElectricalEngineering Supervisor:Prof.Li Jin HuazhongUniversityofScienceTechnology Wuhan430074,P.R.
华中科技大学博士学位论文 蚀的效果。同时还从电极形状上探讨了减少烧损的方法,根据旋转椭圆近似法设计了 开关主电极形状的优化设计方案。给出了不同开关结构、不同电极材料和不同电流波 形情况下的大电流烧蚀的微观照片,结果表明旋转电弧场畸变间隙开关能够有效地减 轻开关电极的烧蚀程度。此外本文还对开关电极烧蚀机理和开关放电电弧在电极表面 上的运动进行了模型分析,发现电极烧蚀的典型图象大致有弧坑、突起和裂纹三种,解释了在定向运动电弧作用下开关电极表面烧蚀痕迹的微观不连续现象。
华中科技大学博士学位论文 can be achieved by providing rotating magnetic field from outside or by self-induced one.The rail-gap switch has thefeatures of lowimpedance,lowwearrate,wide operatingrangeandlowjitter time.In this as a third trigger electrode can distinctlyreduce the electrode erosion andprolong the li