查询词典 Ac

ABSTRACT:In 1970's,one method of AC induction motor control called Direct Torque Controlwas raised.

直接转矩控制是20世纪70年代提出的，在80年代中期发展起来的新型电机调速方法，是继矢量变换控制技术之后，且与之并行发展的一种新型的高性能的交流调速传动的控制技术。

In this paper, a stable and efficient control of the frequency of pure AC induction motor.

中文摘要本文介绍了一个稳定的和高效率的纯量变频控制交流感应马达。

The linear position sensors use emitter and receiver coil systems, precisely arranged on a printed circuit board, that are activated with a high frequency AC field and produce an inductive RLC circuit with the positioning element.

该线型位置传感器使用发射器和接收器线圈系统，精确地排列在一个印刷电路板上，它被一个高频交流电领域所激活，产生一个感应的RLC电路和定位元素。

Following formula calculates the inductive reactance of an ideal inductor (i.e., one with no losses) to a sinusoidal AC signal.

包括电感的电抗，下列的方程式用来计算一理想电感在一正弦波交流讯号下的电抗

For this reason, an optimal automatic timing control algorithm is proposed, that can restrain the switching frequency in a certain range to achieve the purpose of high efficiency and energy conservation. Taking such factors as inductive reactance at AC side, switching frequency, harmonic distortion rate and switching loss as well as the interaction among them into consideration, the formulas for inductive reactance and switching frequency are given; then by use of digital signal processor TMS320F2812, a prototype based on the proposed algorithm is implemented, and using this prototype the effectiveness and practicality of the proposed method are verified by experimental research and simulation.

文章提出了自动定时控制的优化算法，将开关频率限定在一定范围内，以达到高效节能的目的；综合考虑交流侧感抗、开关频率、谐波畸变率和开关损耗等指标，提出了主电路电感参数和开关频率的选择公式，并采用TMS320F2812数字信号处理器构造了试验样机，进行仿真和试验研究，其结果证明了该方法的有效性和实用性。

Their two other games in Italy in UEFA competition saw them awarded a 3-0 win against AC Fiorentina in the 1977/78 UEFA Cup second round after the ineligibility of a Fiorentina player. In the 1997/78 UEFA Cup quarter-finals, Inter gained a measure of revenge for their defeat the previous year by winning 1-0 at home and drawing 1-1 away.

他们和意大利球队的另外两场欧足联赛事的情况是这样的：1977/78赛季欧洲优胜者杯第二轮对佛罗伦萨，被判3-0获胜，因为佛罗伦萨使用了没有资格的球员。1977/78赛季的欧洲优胜者杯四分之一决赛，国际因前一年主场1-0的失败遭到了报复，客场是1-1。

When complete the equipment connections, should callback according previous process, affirm inerrability, and then insert power supply box three cores flat plug into triplex wires independent receptacle, set the power supply box switch at "ON" with special keys.

设备间接线及设备完成后，应按上述程序复查一遍，确认无误，再将电源盒电源三芯扁插头插在 AC 220V/10A 三扁独立插座上，用电源盒专用钥匙将电源盒开关置"ON"位置，按下列步骤检查试机

When complete the equipment connections, should callback according previous process, affirm inerrability, and then insert power supply box three cores flat plug into triplex wires independent receptacle, set the power supply box switch at 'ON' with special keys.

所有安工程完成后，在检查一遍所有连线，确认无误，再将电源盒电源三芯扁插头插在 AC 220V/10A 三扁独立插座上，用电源盒专用钥匙将电源盒开关置"ON"位置，按下列步骤检查

Firstly, the transient stability of the modes by which some kinds of huge power suppliers are connected with AC power grid is analyzed and compared in detail; then a detailed transient stability simulation of a certain large-scale demonstration system is performed; finally some helpful conclusions are obtained: in the general situation, the bundling power transmission mode is favorable to increase the stability of sending system; if it is helpful to evidently increase the inertia of the equivalent leading group, the mode that connects the huge power supplier with sending system will be helpful to enhance the stability of sending system, however it is necessary to perform simulation and analysis while these principles are applied to FACT systems.

首先从机制上对几种大电源接入交流系统方式的暂态稳定性进行了详细的分析和比较；然后对大型算例系统进行了详尽的暂态稳定仿真；最终得出了一些有用的结论：一般情况下，打捆送电方式有利于提高送出系统的稳定性；如果有助于显著增加领前群的惯量，则与送端系统相联的方式也有助于提高送电系统的稳定性，但仍要结合具体系统进行分析。

The physicochemical properties of AC, such as high specific surface area, good electrical and thermal conductivities as well as the chemical inertness make it gain extensive attentions.

它具有比表面积大、导电和导热性佳、化学稳定性好、价格便宜等特点，受到了人们的广泛关注。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。