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The result shows that the static state stability limit value of a. c. exciting generator relates to rotor slip.

验证了异步化同步发电机在任一滑差点异步化同步稳定运行时功-角特性的正确性。

The method of bang-bang control of a. c. exciting generator has been verified and the correct results are achived, which lays a foundation to apply a. c. exciting generator in industrial practical operation.

试验验证了异步化同步发电机鲁棒控制方法的正确性和可行性,从而为异步化同步发电机工业实用化运行奠定了基础。

This task is based on the principle and structure of asynchronism motor, the database was applied into the asynchronism motor.

课题以异步电机的原理与结构为根本,把数据库技术应用到异步电机中来。

First, the paper reviews the development and research of AC transfer speed system, introduces the different control strategy of transfer speed system for asynchronous motor, and discusses the basic principle of vector control system for asynchronous motor in detail,including the mathematics model and coordinate transformation of asynchronous motor, the fundamental equation of vector control, the estimation method of rotor flux, the system structure of vector control etc. Then, the paper lays stress on the fundamental principle, control algorithm and realization method in TMS320LF2407 of space vector pulse width modulation technology.

本文首先简述了交流调速系统的发展和研究重点,介绍了异步电机调速系统的不同控制策略,详细论述了异步电机矢量控制系统的基本原理:异步电机的数学模型和坐标变换、矢量控制的基本方程式、转子磁链的观测方法、矢量控制的系统结构等,并重点分析了空间矢量脉宽调制技术的基本原理、控制算法以及在TMS320LF2407中的实现方法。

It is based on the asynchronous reference concept which provide asynchronous and potentially remote method invocation.

它基于异步引用概念,提供了异步和潜在的远程方法调用。

Petrify is a EDA tool for designing asynchronous circuit basing on Petri net,it has powerful function and convenient to manipulate.

Petrify是一个支持基于Petri网设计异步电路的EDA软件,其操作简单功能强大,可以通过这个软件设计出速度无关异步电(来源:35ABC论2525文网www.abclunwen.com)路。

Unfortunately, there is inevitably difference in characteristics of the induction motors and converters in a parallel AC drive system, therefore each induction motor as well as converter can not operate at the same working point, some may be overload, some underload.

并联着的各个交流调速系统的负载是不均衡的,这是因为逆变器所带的负载—异步电动机参数及特性不可避免地存在差异,两或多台逆变器作为电源,其等效参数也很难一致,各驱动轮径总存在偏差,因此各台逆变器的输出电流和各台异步电动机的定子电流是不相一致的,有的逆变器、异步电动机可能过载,有的还可能欠载。

Then detailedly introduces the principle of pole-changing modulating speed and design feature in times pole proportion and non times pole proportion in the Mixed pole-changing simplex winding multispeed asynchronous motor , carry on discuss to the main parts of electrical machinery electromagnetism computation; by using VISUAL BASIC under WINDOWS platform for computer-aided design method for the mixed pole-changing simplex winding multispeed asynchronous machine, carries on profound analysis for the computer-aided design in the following aspect such as rotor and setting flush piece size, groove shape size, the rotor and setting winding connection, and start performance.

本文在介绍了单绕组多速电动机的概况,阐述了目前多速电机的发展现状与前景;利用槽号相位图以及混相原理对变极绕组进行了研究,确定了绕组的混相方案;并详细地介绍了混相变极单绕组多速电机在倍极比与非倍极比时的变极调速原理以及设计特点;对电机电磁计算的主要几个部分进行了讨论;介绍了使用WINDOWS平台下的VISUAL BASIC对混相变极单绕组多速异步电机的计算机辅助设计方法,对混相变极单绕组多速异步电机的定转子冲片尺寸、槽形尺寸、定转子绕组接法、定转子相带、起动性能的几个方面的计算机辅助计算进行了深刻分析;最后,对混相变极单绕组多速异步电机的样机检测试验结果进行了分析。

When wound-rotor induction motor is operated at over speed driven by induction motor and its rotor winding is excited by altemating current with working frequency higer frequency altemating volage can be produced.

应用异步电机拖动绕线转子异步电机超速运行且其转子绕组如以工频交流励磁产生高频交流电的原理,组成150Hz固定频率M-G交流发电机组,进行YZ、YZR系列电机超速及升高电压试验。

In this article, taking the capacitor phase-splitting single-phase motor for example, the reversion method of single-phase asynchronous electromtor was introduced.

本文以电容分相式单相异步电动机为例,介绍单相异步电动机的反转。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。