查询词典 voltage doubler

In this scheme weak voltage area are determined by the network sensitivity index method; Considering the relation between low voltage level and voltage collapse, it is put forward that the voltage magnitude variation rate is taken as the observed information for the grouping of weak voltage buses and weak voltage grouping are given; Taking geographic factors into consideration, a fuzzy maximal tree is established to group the weak voltage buses. The method to measure the incomplete observability of buses and the flow chart of PMU configuration are given.

应用网损灵敏度法来判断电压崩溃临界点和电压薄弱区域；考虑低电压水平与电压崩溃的关系，提出将电压幅值变化率作为电压薄弱母线分群所观察的信息，并且给出了电压薄弱分群指标，兼顾地域因素，采用模糊最大树聚类法将电压薄弱母线分群；给出了母线非完全可观测程度的度量方法以及 PMU 的配置流程。

The anode structure of CI-LIGBT is optimized by numerical simulation, and it is pointed out that segmented p〓 anode region surrounded by n〓 anode region is the key to improve the ability of current limiting, and the more deeper the n〓 anode junction relative to the p〓 anode junction, the more powerful the ability of current limiting is. The affection of the breakdown voltage BV〓 of the reverse biased p〓n〓 junction and the sample resistance upon the latching current, the latching voltage and the on-state voltage have been studied, and it is indicated that the tradeoff between the on-state voltage and the latching characteristics is the excellentest when BV〓 is 1. 1V so that its on-state voltage can be just only 0.6V higher than conventional LIGBT. It is also found that this device is especially suit to high temperature environment. Based on X. B. Chen's surface voltage sustaining structure using optimized variational lateral doping and Ludikhuize's multiple floating rings structure, high voltage LIGBT and is studied in this paper.

通过数值模拟，优化了CI-LIGBT的阳极区结构，指出采用被n〓阳极区包围的单元状p〓阳极区是提高该器件限流能力的关键，而n〓阳极区结深相对p〓阳极区结深越大，器件的限流能力越强；分析了反偏p〓n〓结击穿电压BV〓和取样电阻对器件闩锁电压、闩锁电流和导通压降的影响，得出BV〓在1.1V时器件导通压降和抗闩锁能力间的折衷关系最优，其导通压降仅比普通LIGBT高0.6V；分析了温度对LIGBT闩锁性能的影响，表明CI-LIGBT即使在450K的高温下也不会闩锁，尤其适用于高温工作环境。

In chapter 4, a study of GaAs FET doubler is presented, and experimental verification the doubler is work well in Ka-band.

首先对肖特基二极管做了简介，然后对已有的混频器电路做了比较，最后设计了Ka频段平衡混频器。

Chapter 2, we design a kind of X-band doubler, introduce a kind of multiple doubler, and that is realized step by step, in this thesis, we adopt 22432 to get microwave output.

第二章一种X波段微波倍频器的设计，我们采用了多级倍频的方式得到输出频率。

In the voltage doubling rectifying circuit, the high voltage has been realized by the positive and negative way, and the voltage between the cathode and anode could reach 1700 V. In the fly-back switching high-voltage power supply, considering the requirements of each unit of the driving circuits on the power supply, the three-group voltage outputs including low-voltage outputs have been realized: 1600V/20mA,12V/500mA, 5V/50mA, in which UC3842 has been used to achieve pulse width modulation.

在倍压整流电路设计中，采用正、负电压方式实现高压，有效降低了阴阳极间所需的高压，最终两极间可产生1700V电压；在反激式开关电源电路设计中，利用UC3842芯片实现PWM调制，考虑到驱动电路各单元对电源的需求，设计了包括低压电源在内的三组电源输出：1600V/20mA，12V/500mA，5V/50mA。

Rapid transient electromagnetic pulse generated by impulse voltage discharge may cause serious interference to high voltage measurement, cause disoperation or damage to experimental equipment, and also may cause potential harm to person on-site. Similar question exist in many high voltage laboratories, and it is an important research subject of high voltage measurement. Electromagnetic interference generated by impulse voltage discharge is the most serious interference in high voltage test hall.

冲击电压放电产生的快速暂态电磁脉冲可能对高压测量造成很大的干扰，引起设备的误动或损坏，也可能对人身造成潜在的危害，类似的问题在许多高电压实验室均存在，是高电压测试技术中的一个重要研究课题，冲击电压放电产生的电磁干扰是高电压试验大厅设备中最严重的，随着电子测量控制设备和高参数试验设备的日益增多，这个问题在高电压实验室已经十分突出。

The voltage and the sensitivity of voltage to system operation parameters are calculated by Newton power flow approach; the various higher order derivatives of voltage and voltage sensitivity to line openbreak parameter can be obtained by using the convergent correction equation of power flow and the equation of calculating sensitivity for the N power system. Finally, the voltage and sensitivity of N-1 power system can he calculated by correcting the voltage and sensitivity of N power system by Taylor series expansion.

通过牛顿潮流计算出N网络的各节点电压及其对系统运行参数的灵敏度；利用已收敛的潮流修正方程式和N网络灵敏度计算方程式分别对线路开断参数多阶求导，从而计算出电压和灵敏度对此线路开断参数的多阶导数值；根据泰勒级数展开式修正N网络的电压和灵敏度值，得到N-1网络的电压和灵敏度值。

In this thesis, soft starter equipment realized by thyristors power transform circuit is studied. To improve equipment performance, we apply variable reactance technique to AC motor soft starter study. The high voltage AC working winding of reactance is in series with motor winding, while low voltage control winding and thyristors groupware with intelligent controller constitute close loop circuit. We adopt thyristor phase control voltage-regulator mode to control low voltage winding, then control the reactance of high voltage winding, and then arrive at the goal-control the current and voltage of motor AC to realize motor soft starting.

本文研究由晶闸管功率变换电路实现的软起动器装置，为了提高装置的性能，将可变电抗技术应用于交流电机软起动研究中，电抗器的高压交流工作绕组与电动机绕组串接，低压控制绕组与带智能控制器的晶闸管组件组成闭合回路，采用晶闸管相控方式控制低压绕组，从而控制高压绕组的阻抗，以达到对电机电流与电压的控制，最终实现电机软起动的目的。

The article adopts "humidity ratio" integrated emendation method and other two traditional emendation methods in emendation calculating on several group test results. The tests are : simulating test in artificial climate room on 110kV substation equipment of Yangbajing, Lasa and Yanghu by Xi"an High Voltage Lab; power frequency voltage discharge test of ZS-110 by Yunnan provincial electrical research academy. It compares and analyses the equipment test voltage emendated to standard atmosphere conditions with the equipment nominal withstanding voltage. And then it concluded that: the emendation value educed by "humidity ratio" integrated emendation method is basically equal or close to the equipment nominal withstanding voltage; but the values by two traditional emendation methods are mostly higher.It also proves that,"humidity ratio integrated emendation method is more perfect than any other methods, and it can reflect the influence degree of atmospheric parameters on electrical equipment outer insulation discharge voltage actually. The method should be spread in designing high elevation power projects.

文中选择&比湿&综合校正法和两种传统校正法，分别对西高所为羊八井、拉萨、羊湖110kV变电所设备所做的人工气候室模拟试验数据及云南中试所做的ZS-110工频放电电压试验数据进行校正计算，将试验电压的校正值与试验设备的标称耐受电压水平进行比较分析；认为：&比湿&综合校正法的校正值与设备耐受电压水平基本相等或接近，而两传统校正法的校正值大多高于设备耐受电压水平；进一步证明，&比湿&综合校正法是目前诸多校正法中较为完善的，能真实地反映大气参数对电气设备外绝缘放电电压的影响程度的校正法，在高海拔电力工程设计中应推广应用。

In this paper,the discharge capacity,stability voltage and the ratio of constant current charge capacity and battery discharge capacity of lithium ion battery were studied. For the lithium manganese lithium-ion batteries,the discharge capacity,mid-value voltage and stability voltage all increased with increasing charge cutoff voltage. As long as charge cutoff voltage was no less than 4.15 V,the battery discharge capacity loss would not exceed 6%. When charge cutoff voltage was 4.15V,the constant current charge capacity accounted for more than 85% of total charge capacity,a little change from 4.20 V.

主要研究了不同截止电压对锰酸锂离子电池的放电容量性能、工作电压和恒流/恒压充电容量等电池性能的影响，结果表明：对于锰酸锂材料锂离子电池，放电容量、中值电压和稳定电压都随着充电截止电压的升高而提高，电池的充电截止电压只要不低于4.15 V，电池放电容量损失就不会超过6%；当充电截止电压为4.15 V时，电池的恒流充电容量占总充电容量的85%以上，与4.20 V相比变化不大。

A sheep eats beef and drinks green tea.

羊吃了牛肉喝了绿茶。

But Arthur Mayne, a biologist who has three sons aged from 18 to 12 years, disagrees.

然而有三个从12到18岁大的儿子的生物学家Arthur Mayne对此有不同看法。