调速

For the reason of drawback of DC motor, the system adopted AC frequency conversion speed regulation.

为克服直流电机调速的缺点和提高性价比，系统采用了交流变频调速。

Rotating platform is a normal stage machine. In view of its speed regulation system, a scheme of digital AC speed regulation system base on permanent magnet synchronous motor is presented.

旋转台是一种常用的舞台机械设备，本文针对转台调速系统，提出了基于永磁同步电机的数字化转台交流调速系统的实现方案。

TF-1350 type sugar segregator timing system basicall\ meet demand of timing and sugar technics but esits some def,cicnc\ Such as.

我在现场安装和大量的调式工作中发现原调速系统基本能满足调速要求和糖生产的工艺要求，但也存在一定的不足。

TF-l350 type sugar segregator timing system adopt double loop direct current timing system and PID adjustor which the whole s\stem is made up of simulation component.

TF-1350型糖分离机调速系统采用双闭环直流调速，整个系统由模拟分离元件组成，采用PID调节器。

On the basis of theoretical analysis in the design of the DC-loop variable speed system.

在理论分析的基础上设计了直流双闭环调速系统，并利用MATLAB中的SIMULINK工具箱，对直流调速系统进行仿真分析及参数调试。

This chapter is the theory foundation of engineering analyses and design of this kind of new AC motor variable speed system.

本文针对目前交流调速系统设计实施及其应用推广中存在的问题，提出了一种基于优化PWM波和定子电压定向控制的新型交流调速系统。

For wind machines and pump load widely used in industry, the more desirable speed adjustment strategy is doubly fed regulation in order to save energy.

摘要对于工业中大量应用的风机、泵类负载，为实现节能，比较好的调速方案是采用双馈调速。

Due to these characteristics,it is especially suitable for those situations with high voltage level,High Power and not large speed adjustment range,such as wind machines and pump load. Direct Torque Control which was developed rapidly in the middle of 1980's has been applied to many occasions up to now .

直接转矩控制是80年代中后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。

Due to thesecharacteristics,it is especially suitable for those situations withhigh voltage level,High Power and not large speed adjustmentrange,such as wind machines and pump load. Direct Torque Control which was developed rapidly in the middle of 1980's has beenapplied to many occasions up to now .

直接转矩控制是80年代中后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。

Contrapose the Big power high voltage frequency conversion equipment broad use on big power wind pump speed conversion economize ,the article explain forecast of regulate speed achieve economize power of fire active calcareousness for steel making in big rotative kiln ,and practice use in steel factory.

针对于大功率高压变频器在大功率风机调速节能上广泛的应用，本文介绍了烧制炼钢用活性灰的大型回转窑用引风机变频调速改造的节能预测和在钢厂在的实际应用。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。