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The principle of brushless DC motor the control method with position sensor is introduced, and the control system based on DSP is presented.

介绍了直流无刷电机的工作原理和基于位置传感器的控制方法,提出了基于数字信号处理器的控制系统。

This article first introduced designs the high efficiency cocurrent voltage-stabilized source's composition structure and the control principle, and on the power source main circuit, the control circuit, the protection circuit as well as the control system software's design did have analyzed in detail.

本文首先介绍了所设计的大功率直流稳压电源的组成结构和控制原理,并就电源主电路、控制电路、保护电路以及控制系统软件的设计做了详细地分析。

To experiment on 66mm, 75mm returned flow hydrocyclone and 70mm uniflow hydrocyclone (cone-shaped, columniform) in water-sand intermixture, then each capacity, separation performance and correlative parameter's change rules are obtained and compared. Building up overflow system in series of 66mm and 75mm hydrocyclone, separating property and partition curve of the system through experiment are gained.

分别对66mm、75mm返流式水力旋流器和70mm直流式水力旋流器四种水力旋流器进行砂水实验研究,得出各自的生产能力、分离性能及相关参数的变化规律,并进行比较;组成返流式水力旋流器溢流串联系统,进行性能测试,得出系统的分离性能和级效率曲线。

The surface morphologies of the coatings have been observed by scanning electron microscope and the crystal structures of the coatings tested and analyzed by X-ray diffract meter. With comparison to direct circuit electroplating, resulting in that pulse electroplating showed finer plated granules.

通过扫描电镜观察了镀层的表面形貌,用X射线衍射仪分析了镀层的微观晶体结构,分别研究了影响直流和单脉冲纳米复合镀层显微硬度的各种因素。

According to capability of the circuit of DC motor, build the model of DC motor; designed the speed-current double closed loop system based on the model of DC motor; analyzed the method to solve the problem of discontinuousness of current.

二、根据直流电机回路,建立电动机的数学模型;针对该电动机模型,选用速度——电流双闭环控制系统,建立双闭环系统的控制方框图;分析晶闸管相控整流方式中出现电流断续现象的解决方法。

Series of pure ferric film s are prepared by the magnetron-control sputtering method, and their temperature-resistance properties are measured.

采用直流磁控溅射的方法,制备了一系列不同厚度的纯铁膜,并测量了它们的阻温特性。

The test shall be carried out on the following arrangements of circuits as applicable : between galvanically isolated circuits that are accessible from the exterior.

适当时,试验应在如下的电路布置下进行:介于可从外部使用的彼此直流隔离的电路之间。

The valve's unique capability to accept both AC and DC power without losing functionality or performance enables users to apply it across a large number of applications, said Kemple.

该阀的独特能力接受,而不会失去功能或性能交流和直流电源,使用户在申请的申请数目众多的,说Kemple。

There isn' t overmany differences in the materials, structure, and manufacturing procedure of economizers, superheaters, reheaters and headers between 900MW supercritical pressure monotube boiler and the former boilers made in our company, except the size is bigger.

90 0MW超临界直流锅炉与上海锅炉厂有限公司以往制造的锅炉产品相比,其省煤器、过热器、再热器及相应集箱的材料、结构和制造工艺除了尺寸较大之外无大的差异。

A compensatory voltage vector based overmodulation method for four-switch SVPWM was presented for improving the utilization ratio of the DC voltage.

指出四开关SVPWM最大线性调制比只有六开关时的一半,为提高直流电源电压的利用率,提出基于补偿电压矢量的四开关逆变器SVPWM过调制方法。

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The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作:对伸臂位于顶部的单层框架—筒体模型进行分析,提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。

Its advantage is that it can be used in smaller units.

其优点在于可以在较小的单位中应用。