查询词典 direct current

A rotating electric machine with two armatures, used to convert alternating current to direct current.

在电磁石的磁极之间旋转使得产生的电流通过电枢的机器。

A rotating electric machine with two armatures, used to convert alternating current to direct current.

自动售货机一种商标，用于自动售货饭馆服务，该饭馆的食品由自动售货机分送

First of all, it reviews the academic viewpoints around the causes and the governance of last inflation, although the different viewpoints have explained this inflation from one side, but haven't reached a consensus. Through the analysis of the data of the economic operation, compared with all the inflations since reform and opening up and the global economic situation, it makes a summary of the basic characteristics of the current round of inflation, and analyzes the direct causes of the current round of inflation as well as the underlying causes.

首先对学术界围绕我国上一轮通货膨胀成因及治理的争论进行综述，虽然各种观点都从一个侧面阐释了本轮通货膨胀的成因，但没有取得共识，通过对经济运行数据的分析，与改革开放以来历次通货膨胀情况的纵向比较、与全球经济形势的横向比较，概括了本轮通货膨胀的基本特征，探讨了本轮通货膨胀的直接成因以及深层原因。

With more and more applications of devices of Flexible Alternative Current Transmission System and High Voltage Direct Current transmission, more and more attentions are paid to the power electronics switches mainly composed of thyristors.

随着柔性交流输电和高压直流输电设备在电力系统中的应用越来越广泛，由晶闸管主要组成的高电压大电流电子开关越来越成为人们关注的对象。

The following functions can be realized: Measuerment:the effective values of three phase current and voltage, power frequency, active power, reactive power, power factor etc. Motor control: direct starting, converse starting, star and triangle starting, self-starting. Protection:thermal overload protection, current leakage protection, open-phase protection, three-phase unbalance protection, over voltage protection, loss voltage protection, low load protection and fault warning and fault dates memory. Communication: communication of the computer in control room and the microcomputer monitor in the spots is realized by the interface of RS-485. The motor is not only controlled in the spots but also in control room. The dates, information and some functions are shared by the spots and control room too.

该电动机监控器以80C196KC单片机为核心，通过采样三相电流﹑电压信号来实现以下功能：三相电流﹑电压有效值，电网频率，有功功率，无功功率及功率因数等的测量；对电动机实现直接、正反转、星三角及自起动控制；对电动机实现热过载、漏电、断相、三相不平衡、过压、欠压及轻载保护，对故障进行报警及数据记忆；通过RS-485串行接口与中央控制室计算机实现通信功能，对电动机既可本地，也可远程控制；实现控制现场与控制室之间数据、信息、功能共享。

The reasons why reverse current protection is not necessary in rectifiers of direct current traction substation are described.

摘要通过分析，阐述了直流牵引变电所内的整流器不必设置逆流保护的理由。你知道它的英文吗？

Rectifiers are devices that convert alternating current to direct current.

整流器是一种将交流电转换为直流电的仪器。

When the cables use inalternating current system, rated voltage of cables should be at least equal the rated voltage of the system; When the cables use in direct current system,rated voltage should be not greater than 1.5 times of the rales ted voltage of the cab.

当电缆使用于交流系统时，电缆的额定电压至少应等于该系统的额定电压；当电缆使用地直流系统时，该系统的额定电压应不大于电缆额定电压的1.5倍。

High-power rectifier devices can work efficiently to high frequency alternating current into direct current, in the'60s and'70s, Thyristor power rectifier tube and to the development and application of great development.

大功率硅整流器能够高效率地把工频交流电转变为直流电，因此在六十年代和七十年代，大功率硅整流管和晶闸管的开发与应用得以很大发展。

The chapter four to chapter eight analyze the railway engineering cost making standard from the sides respectively including railway engineering quotation, railway quotation direct cost, site administration cost, construction measurement cost, indirect cost and profit, analyze the key factor which influencing cost, confirm the scientificity and rationality of the current cost making standard basing on field measuring data, bring forward the advise of the ways and method of reducing invest and cost, and bring forward the opinion and advice for improve and perfect the current railway cost making standard.

第4～8章分别从铁路工程定额、铁路定额直接费、现场管理费、施工措施费、间接费和利润等方面对铁路工程造价计价标准进行分析，分析影响费用的关键因素，依靠实测数据检验现行各项计价标准的科学性与合理性，提出降低投入、减少成本支出的途径和方法的建议，并对现行铁路计价标准提出改进和完善的意见和建议。

They have quite a lot of work to do.

他们有许多工作要做。

Let us give you a more elaborate example of this process.

让我们给你这个过程的更多的详细例子。