dc DC, D. C. = 1.direct current 直流电:a DC generator 直流发电机。 2.District of Columbia 哥伦比亚特区〔美国首都华盛顿所在的行政区域〕:Washington, D. C. 美国首都华盛顿。 3.〔意大利语〕 da capo (= repeat from the beginning). 4.Deputy Consul 副领事。 5.District Court 〔美国〕地方初审法院。
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 this paper some technical questions of high voltage dc switching power supply were investigated by using theoretical analyses , numerical simulation and experiment 本文通过理论分析、数值仿真和实验等手段,针对高压大功率开关电源技术实现过程中所存在的一些问题进行了研究。
The more functions there are , the more power losses they disspate . thus they require the battery power supply system ’ s size smaller , weight lighter and efficiency higher . to meet these requirements , high efficiency dc - dc switching mode power supply is adopted 目前的手机等各种高效便携式电子产品日趋小型化,并且随着功能的不断增多其功耗也随之增大,因此要求其电池供电系统体积更小、重量更轻、效率更高,从而须采用高效率的dc - dc电源。
The switch power systems composed of single - chip integrated dc - dc controllers stand for an intendance of modern dc power supplies and were widely applied in the fields of communication , portable computers and the other consumable . the market demanding for monolithic dc - dc switch controller will be swelling up for a long time 采用单片集成dc - dc控制芯片设计电源管理系统能够满足现在便携式电子产品对电源提出的高性能要求,代表着直流稳压电源管理的一种发展方向,具有很好的市场前景和研究价值。
Its being used can form high efficiency insulated switching power supply without using utility power transformer . the switching power ic is selected firstly in the design of high power switching power supply , precision switching power supply , application specific switching power supply and so on in the world , which has been making switching power supply short , small , light and thin the control techniques of dc - dc switching converters are completely described and analyzed 单片开关电源管理集成电路具有高集成度、高性价比、简单外围电路、优越性能指标等优点,能构成高效率无工频变压器的隔离式开关电源,目前已成为国际上开发中、小功率开关电源、精密开关电源、专用开关电源以及开关电源模块的优选集成电路,使得开关电源正朝着短、小、轻、薄的方向发展。
High voltage dc switching power supply with high frequency and high power are required by the development of many new technologies , such as numeric imaging of x - ray for medical use , compact pulsed power source etc . the technology of high voltage dc switching power supply has been successfully developed in advanced countries , but is under development in china 许多高新技术的发展,如医用x线机数字化成像技术,紧凑型脉冲电源技术等,都需要采用大功率、高频化的高压直流开关电源。在国外高压大功率开关电源技术已较为成熟,我国对这方面的研究也一直在进行,但目前还不成熟。
The thesis discussed a parameter extraction program for the mosfet level1 model . in the analysis and design of circuit , at first , the thesis described the system function of the new dc - dc switching converter . then several sub - circuits of converter ic such as oscillator , over - temperature shutdown circuit , auto - restart counter circuit and control circuit were completely discussed 在电路设计中,本文首先分析了开关电源电路的基本拓扑结构和psm调制模式,接着对开关电源变换器进行了系统的原理分析并设计了总体框图,然后详细设计了振荡器电路,热保护电路,自动重启计数器电路和主控门逻辑等子电路并进行了功能仿真。