无脉动的

Laser Doppler Anemometry was used to measure the velocity in volute and impeller of the pump. Three velocity components magnitudes were obtained, so was the mean square root fluctuating value.

运用激光多普勒测速仪，对旋流泵最优工况下的无叶腔及叶轮内部速度场进行了测量，得到周向速度、轴向速度、径向速度及其对应的均方根脉动速度分布等。

A new sensorless speed control scheme for permanent magnet synchronous motor driver is presented. The nonlinear mathematical model of PMSM is established in α-β reference frame and linearized around the best estimator.

永磁同步电机无位置传感器调速系统具有控制方法简单，转矩脉动小，抗扰动能力强，调速性能好等特点，调速系统所要解决的问题是采用何种方法获取转速和转角。

Full visuals had not yet formed; the air remained empty except for the pulse of transmission codes which told the Consul that this fatline squirt had originated on the Hegemony administrative world of Tau Ceti Center.

全像尚未建立；除了传送代码的脉动，眼前还是空无一物。领事不需要传输坐标就知道，超光信息是从鲸逖中心①传来的，那是霸主行政中心所在的星球。

To permanent magnetic brushless direct current motors, torque tipple is one of the major problems to be solved.

在永磁无刷直流电机中，转矩脉动是需要解决的主要问题之一。

The physical examination was normal except for hypertension and absence of left-side dorsalis pedis artery pulse. Electrocardiography and cardiac enzyme levels were both normal.

理学检查发现高血压及左侧足背动脉的脉动消失，除此之外，心电图和心肌酵素皆无明显变化。

The result of experiments shows that chain-ring overrunning clutch can be competent in those application areas.

实验结果证实，在脉动无级变速、液力变矩器等传统摩擦式超越离合器难以胜任的领域，链环式超越离合器能够满足使用要求。

At first,the prin ciple of BLDCM is analyzed and the model is built;then a test is performed on a tining system of close loops of speed and current;torque ripple components are r educed by controlling switching andles of the PWM.

文中首先建立永磁无刷直流电机的数学模型，以此进行转速和电流双闭环调速系统控制；并通过调节 PWM发生器的开关频率来减少转矩脉动。

This article describes the structure and working principle of im pu lse steppless speed variator,its present development,its limitation s and counter measures of application,its present progresses are also introduced.

本文介绍了脉动式无级变速器的结构原理、发展现状、应用中的局限及对策，并列举了现有研究进展。

Applying the mechanism known as the roller- swing link cam and the rocking block mechanism,a pulsing stepless speed variator is composed, with its swing angular being adjustable.

利用滚子摆动推杆凸轮机构与摆块机构，综合成摆角可调的脉动式机械无级变速器，并针对其工作原理及特性作了论述。

The torque ripple was large when its speed was low,its application was limited for the commutating process.

摘 要：常规永磁无刷直流电机，其换相位置检测采用霍尔开关元件，由于换相过程的存在，其低速运行时转矩脉动较大，限制了其应用。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。