调速

It is through frequency conversion power output shaft to change, reduce the input power saving energy.

它是通过变频调速改变轴输出功率，达到减少输入功率节省电能的目的。

The energy saving principle, the function of hydraulic governing and its application in mine fan and water pump were introduced.

介绍了液力调速的节能原理、功能及其在矿山风机、水泵上的应用。

In order to simplify control parameters design, the modeling method of equivalent inductance is put forward and Validated by simulation and experimentation.

在此基础上为简化控制系统参数设计，利用等效电感建模法建立了调速系统在复频域内的动态数学模型，并进行了仿真和试验验证。

On the running theory of electrical power ergograph and the basic control theory basis, this paper expatiate on the mathematic model and modulating speed of ergograph, and expounds the principle and ways of design of hardware and software for measure and control system, and describes the hardware and software with some frames and interfaces, and importantly recommends the way of designing software.

本文根据电力测功机的工作原理和控制理论基础，主要阐述了测功机的数学模型和调速原理以及整个测控系统的硬件和软件设计的原理和方法，并辅助框图和界面对软硬件进行了详细描述，重点介绍了系统软件的设计。

Based on the practical situation of central heating, a PLC control system for a heat exchange station is introduced, which is mainly composed of PLC, PID controller and inverter.

本文根据集中供热的实际情况设计了一套换热站变频调速PLC控制系统，它主要由PLC、PID控制器和变频器组成。

But going with the power system"s development, many new excitor models, PSS models, turtine models, governor models and boiler models appear. It"s not satisfied to increase new interior models in model library. Furthermore openness is a basic characteristic of DTS. So it is very important to constitute a very high efficient, convenient and universal tool for users who can set up new models by themselves.

然而随着电力系统的发展，各种新型的励磁系统模型、PSS模型、原动机模型、调速器模型、锅炉模型不断出现，继续在模型库中新增固定模型的做法显然难以满足众多用户的要求，而DTS的一个基本要求就是开放性，因此建立一个高效、方便的通用平台，以方便用户自行构建动态仿真的模型就显得非常重要。

The practices have proved that the system has excrement dynamic and static capability, so it is economical and feasible.

实践结果表明，该系统设计合理，具有良好的动静态性能，是一种经济实用的高压变频调速系统。

Is located in the scenic northern suburb of Yangzhou City, near the ancient buildings with the culture of Yangzhou Han Tomb, is a scientific research, production and marketing into one's strength-based company, has specialized in fitness equipment by computer count table experience, development and production of a variety of ordinary treadmills, Lut fat machine, electric treadmill computer table, electric speed control system and the lift and so on, received wide acclaim, industry users.

扬州高驰电子有限公司座落在风景秀丽的扬州市北郊，临近具有古建筑文化的扬州汉墓，是一个集科研、生产、营销为一体的实力型公司，有专业从事健身器材用电脑计数表的经验，开发和生产了各种普通跑步机、甩脂机、电动跑步机用电脑表、电动调速控制系统和升降机等等，得到了业内用户的广泛好评。

Permanent magnet synchronous motors have been widely used as AC drives over the last two decades due to their high efficiency, high power density and no dc field winding in the rotor. It is well known motion control of PMSM requires accurate position and velocity signals to realize field orientation.

永磁同步电动机由于无需励磁电流、运行效率和功率密度都很高，在过去的二十年里已被广泛地应用在交流调速传动中，但它的高性能控制需要精确的转子位置和速度信号去实现磁场定向。

The performance of speed regulation of AC motor can compare with that of DC motor after the FOC is introduced into AC motor field.

采用矢量控制后交流电机的调速性能可以和直流电机媲美。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。