switch n. 1.(树上折下的)细树枝;软鞭子;鞭打。 2.假发;(尾巴上的)毛簇。 3.〔美国〕【铁道】道岔扳子,轨闸转辙器;侧线。 4.【电学】开关;电闸;电键;转换器;【电话】接线台。 5.【军事】斜行壕。 6.(思想等的)大转变。 7.〔美国〕(金融机构和销售店的)电脑化联网。 a change-over switch 转换开关,转向开关。 a pull switch 拉线开关。 a three wire switch 双联开关。 a time switch 定时断路器。 a clock switch 定时开关。 a line switch (自动电话的)寻线机,预选器;线路开关。 vt. 1.鞭打;摆动;摇(尾);猛然抢去。 2.挂断(…的电话)(switch sb. off);关闭(电流),关(电灯) (off; out)。 3.通(电流),接通(电话给某人),开(电灯) (on)。 4.改变,转变(思想、谈话等);【铁道】给扳道岔;调配(车厢)。 vi. 1.鞭打。 2.【铁道】扳道岔;调车。 3.挂断电话 (off)。 4.转换,转变。 switch an electric light on [off] 开[关]灯。 switch off to another like of thought 改变想法[思路]。 Let's switch. 〔美国〕走吧;开动吧。 I'll be switched. 〔美口〕〔表示否定、惊讶〕(I'll be switched if you do. 你要是能的话我就把头砍掉)。 switch off [on] 不收听[收听](某一广播)。 switch through 【电信】转接。
In the thesis , the insulation recovery properties of spark gap switch are investigated through theoretic analyses and numerical calculation , and the influence of gas flow on the insulation recovery of switch is studied experimentally 本文从理论分析、数值计算等方面研究了气体火花开关的绝缘恢复特性,实验研究了气流对火花开关恢复速度的影响,其研究结果为火花开关的多脉冲运行奠定了坚实理论基础。
A series of multi - pulse experiments are performed at breakdown voltage up to 400kv , peak current up to 30ka with an interval of 5ms , which shows spark gap switch could be obtained good insulation recovery in several milliseconds under the condition of water dielectric pulse power modulator with low load 在击穿电压400kv ,峰值电流30ka ,脉宽40ns的工作参数下,采用吹气的办法(气流速度30m / s ) ,使气体火花开关多脉冲运行间隔达到5ms ,实验结果与理论估计相符。
The technology of alternating - current - boosting by way of constant current is successfully used to charge capacitors with 25 kilojoules of energy in only eight seconds . rail - gap switch with performances of long life and highly steady state are designed . and the high voltage pulse generator , which can produce low - excursion and fast - rise pulses , are designed by using double trigger circuit and hydro - thyristor as switch 在大功率恒流充电技术上,成功的应用了交流调压式恒流技术,可以在8s内让电容器储存25kj的能量;设计出了长寿命、高稳定的轨道开关;采用氢闸流管做开关,使用双触发电路,研制出了低抖动、快前沿的高压脉冲发生器(点火机) ;采用单片机和pld ,研制出了精度为10ns的延时同步机。
Water dielectric pulse power modulator has been widely applied because of its merits of high energy storage density , compactness , and capability to drive low impedance high power microwave sources . research for multi - pulse operation of high power spark gap switch with high current and comprehending its physical properties are the basis to study multi - pulse operation or repetitive operation of water dielectric pulse power modulator 水介质脉冲功率调制器具有储能密度高,结构紧凑、与低阻抗微波源较好匹配的特点,因此得到广泛的应用,但是受到高功率、大电流气体开关的绝缘恢复的影响,水介质等低阻抗脉冲功率调制器的重复频率运行或多脉冲运行受到较大的限制。
All analysis and simulations results indicate several methods improving the insulation recovery of spark gap switch : ( 1 ) using the gas with good thermal conductivity , such as h2 and sf6 ; ( 2 ) using the gas flow ; ( 3 ) utilizing the v / p cure ; ( 4 ) modifying the geometry and size of the electrode ; ( 5 ) using the gas with good electronegativity , such as sf6 . some experiments on the multi - pulse operation of high power spark gap switch are carried out . the insulation recoveries of switch without and with gas flow are both investigated 结合理论分析和模拟结果,提出了气体火花开关多脉冲运行特性可采用如下方法: ( 1 )使用导热性能好的气体,如h2 、 sf6等; ( 2 )采用吹气的方法; ( 3 )增大气压,在电极表面增加细小结构,构造平稳的v / p曲线; ( 4 )改良开关电极结构和尺寸,采用奶头-半球结构的电极; ( 5 )使用电负性强的气体作为开关绝缘气体,如sf6 。