frequency constant的例句大全

Direct drive permanent magnet synchronous generation system plays an important role in the variable speed constant frequency wind power generation field because of its good operation performance, high efficiency and high reliability.

直驱式永磁同步风力发电系统因其良好的运行性能、效率高与高可靠性等优点，在变速恒频发电领域占据着越来越重要的地位。

Because direct-drive variable speed constant frequency wind power generation system is high efficiency, simple structure and stable operation, it is one of development trends and current research focus of wind power technology.

直驱变速恒频风力发电系统由于其效率高，结构简单及稳定运行，是风力发电技术的发展的趋势和当前研究热点之一。

A disk-type PM synchronous generator which is used in the direct driven variable speed constant frequency wind energy sys-tem, is presented and its principle and electromagnetism design are analysed.

提出了一种用于直驱式变速恒频风力发电系统的盘式永磁同步发电机，对其运行原理和电磁设计进行了分析和推导。

Double Fed Induction Generator ( DFIG) has become the mainstream generator of variable speed constant frequency wind power generation technology because its electrical safety and reliability and the converter of which could be of small capacity.

双馈感应发电机（DFIG）因其变频器容量小、安全可靠的优势，已成为变速恒频风力发电技术中的主流机型。

For the problem that asynchronous motor starting generates a great current impact, this paper presents speed open-loop constant proportion of voltage to frequency control method.

针对异步起动过程中定子绕组产生过大冲击电流的问题，提出了逐级变频的转速开环恒压频比控制同步电动机软起动方法。

As the speed is constant, when the frequency is increased, the wave length will.

因为速度不变，当频率增加时，波长就会减少。

The Constant Temperature Control System by Microcomputer for High Frequency Welding Tube

高频焊管的微机恒温控制系统

From the band structure, we can see the frequency scope of photonic band gaps, but we know nothing about the evanescent modes in the band gap, such as the decay constant of an evanescent mode.

通过光子晶体的能带结构，我们可以知道光子带隙的频率范围，但不知道光子带隙中消散模的任何信息，如衰减系数等。

The treatment of 69 cases with vocal nodules with constant amplitude medium frequency sinusoidal current

等幅正弦中频电流治疗声带小结69例

The VCXO circuit can put out clock signals with high stable frequency and the constant amplitude.

设计的VCXO能输出高稳定度、振幅恒定的时钟信号。

The treatment of vocal nodules with constant amplitude medium frequency sinusoidal current is reported in this article.

本文报道了等幅正弦中频电流治疗声带小结，有效率为31.88%，治愈率为59.42%，总有效率为91.30%。

With the constant development of medical science and technology and increasing frequency of international contacts, cross cultural communication becomes more and more important and necessary.

随着医学科学的不断发展和国际交往的日益频繁，跨文化交际日趋重要。

in terms of applying smaller feature size, it enables to drop power dissipation while the highest cut off frequency being constant.

可以通过采用更小特征尺寸，在保持最高截止频率不变的情况下，降低器件的功耗。

For periodic excitations, the controller provides satisfactory vibration reduction in the cases of constant frequency/ constant amplitude, varied frequency, and varied amplitude excitations. The sums of the squared accelerations in controlled cases are decreased to 1% of those in uncontrolled cases.

对周期激励，在激励信号恒频率/恒振幅、变频率、变振幅时，受控结构的振动显著减小，各传感器测得加速度的平方和为无控时的1%或更小。

System, there are two experimental approaches: one is fixed frequency to a constant force load test; a sine sweep signal through the loading mechanism to find the resonant frequency, then resonant frequency of the loading experiments, such experiments to compare the energy conservation.

系统有两种加载控制方式：一种是定频率以恒定作用力控制加载；一种是通过正弦扫频信号寻找加载机构的谐振频率，然后以谐振频率进行加载，这种试验方式比较节约能源。

When frequency is constant, the relationship between tapping torque and vibration type is a humped curve. The vibration frequency and vibration type must be optimized for vibration tapping.

试验表明：振型一定时，攻丝扭矩随振动频率的增加而增大；频率一定时，攻丝扭矩与振型成驼峰曲线关系；

Research of the Megawatt Level Variable Speed Constant Frequency Wind Power Unit Control System

兆瓦级变速恒频风力发电机组控制系统

Digital Control System for Thyristor Threephase Constant Voltage with Intermediate Frequency

一个晶闸管三相中频恒压电源的数字控制系统

The Research for Variable Frequency Speed Regulation with Constant Power of Asynchronous Motor

异步电动机恒功率变频调速的研究

In this paper the linear induction motor model is given on the basis of equivalent circuit compensating the end effect. In addition, the concept and the method of constant slip frequency control of linear induction motor are analysed.

根据把端部效应考虑在内的等值电路，建立直线感应电机的数学模型，分析直线感应电机的恒转差频率控制的思想和实现方法，并对控制系统进行仿真。