发电机

This paper then compares three kinds of power conversion circuit applied in it and advances a main circuit which is based on IGBT's power grade nowadays and is applied in high power direct-driven grid-connected wind turbine. It is made up of a six-phase rectifier, two paralleled BOOST chopper circuits and two paralleled SPWM inverters.

文章在比较此种风力发电机的三种类型变流电路拓扑结构的基础上，提出了一种在考虑现有开关器件功率水平的情况下符合大功率直驱并网型风力发电机要求的变流电路拓扑结构，即采用&六相不控整流+两个并联的升压斩波+两个并联的三相SPWM逆变&的电路结构，并对其各部分电路的工作原理进行了分析。

In order to study diesel locomotive AC-DC electric-drive system, this thesis makes a analysis of the primary capability parameters of AC-DC electric-drive system, under the train"s running state, such as traction dynamotor"s voltage/ current, pulling power and train velocity, then makes a research in the ideal running characteristic and the adjust characteristic of dynamotor and the speed adjust characteristic of electromotor with the theory of AC-DC electric-drive.

本文针对内燃机车交-直电力传动系统，对机车运行过程中，传动系统的主要性能指标参数(如牵引发电机电压/电流、牵引力、机车速度等)及其关系进行分析；并运用交-直电力传动原理，对机车电力传动过程中牵引发电机的理想外特性、调整特性及牵引电动机的速度调节特性进行研究；通过参考东风7型内燃机车的性能、结构参数，运用Visual Basic对内燃机车交-直电力传动系统进行数学建模。

While small generators frequently have revolving armatures, large machines usually have stationary armatures and revolving field.

通常，小型发电机采用旋转的电枢，而大型发电机则采用固定的电枢和旋转的激磁线。

While small generators frequently have revolving armatures,large machines usually have stationary armatures and revolving fields.

通常小型发电机采用旋转的电枢，而大型发电机则采用固定的电枢和旋转的激磁线组。

While small generators frequently have revolving armatures,large

通常，小型发电机采用旋转的电枢，而大型发电机则采用固定的电枢和旋

While small generators frequently have revolving armatures, large machines usually have stationary armatures and

通常，小型发电机采用旋转的电枢，而大型发电机则采用固定电枢和选择的激磁线组。

A diesel engine dynamotors unit, which is one of important parts of the power station in a ship, has a complex structure, so it is very difficult to diagnose its faults, and for the traditional fault diagnosis methods, it hard to make an accurate diagnosis.

船舶柴油发电机是船舶电站的重要组成部分。由于柴油发电机结构复杂，故障不易掌握，因而对其进行故障诊断的难度比较大，应用传统的诊断的方法很难精确诊断。

In order to working in multi-functions the ship always be provide with redundant main-engines, rudders, plasmas and double or more dynamotors. It is equipped with revolving orientat ion force equipments.

这种船舶除具有通常的航行运输功能外，还有拖拽平台，消防，救生，海上作业等特殊功能，这种船舶大多数都设置为双主机、双可调螺距浆、双舵、两个或两个以上的发电机、两台轴带发电机、并具有艏／艉推进器和旋转方位推进装置。

At this power, the generator or the generator/inverter system yi elds its rated electrical power on average as specified.

在这个功率点上，发电机或者发电机/变流系统获得指定的平均额定电功率。

Exciters are direct - current generators usually mounted on the generator shaft.

励磁装置是由直流发电机来提供电流的，通常安放在发电机轴上。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。