直流的

The key points of sensorless technology in PMBLDCM are to study a method which can detect rotor position accurately by simply method in whole speed range. After analyzing current sensorless methods of the PMBLDCM, it is found that those methods are successful at middle and high speed, but they often fail to detect rotor position at low speed when the back electromotive force is small or zero.

纵观目前的永磁无刷直流电机的无位置传感器控制方法，比较成熟而可行的方法多集中于电机在中高速区域运行时，能够较准确估计转子位置；电机处于低速、极低速、静止状态时电加热管，因为反电动势幅值较小或者为零，而无法正常工作。

In recent years, high voltage direct current system is rapidly developed, but harmonic pollution is produced and becomes badly, harmonic measurement by true is the precondition and sticking point of restraining harmonic.

近些年来，高压直流输电得到了快速的发展，电网的谐波污染也日趋严重，实时、准确地测量谐波电流信号是有效抑制谐波电流的前提与关键。

This is a device that generates static electricity and high voltage. Its top is a ball-shaped high voltage electric pole; the bottom box is a DC high-voltage power supply.

这是一种能产生静电高压的设备：它的顶部是一个球型的高压电极，在下部底箱内有一直流高压电源。

On the basis of theory and simulation analysis, developed the project prototype of 3KW battery charger for the power systems.

在理论和仿真分析的基础上，研制了3KW的直流电力操作电源的工程样机。

The traditional BLDCM mathematical model establishment in the electric motor two-phase breakover foundations, in fact the neutral point is hanging, inevitable existence three-phase breakover at the same time.

传统的直流无刷电机数学模型建立在电动机两两导通的基础上，而实际上由于电动机中性点悬空，不可避免存在三相同时导通的情况。

I'm making a brisket that's gonna bolw your socks off.

我做的鸡胸肉会让你们馋的直流口水的。

Then it discusses the method and problems of designing the Rare-Earth Permanent Magnet Brushless DC motors, and briefly introduces the principles of Finite Element Method for calculating the electromagnetic field as well as how to use the ANSYS software in checking the electromagnetic values.

然后论述了稀土永磁无刷直流电机设计的方法和需要考虑的问题，并对电磁场计算有限元方法的原理作了简要介绍，以及如何用ANSYS软件对电机进行电磁场数值校核。

One common need for measuring DC voltages in the range of 2 to 30 kilovoltsis in measuring cathode-ray tube final anode voltages.

对于测量2到30kV的直流电压，最普通的需要是测量阴极射线管的决定电极。

Servo system is the typically application of closed-loop control system with direct current, and it is widely applied in every department of national economy.

伺服系统是直流闭环控制系统的典型应用，它在国民经济的各个部门有着广泛的应用。

Central inverter is generally used in large-scale 3-phase PV installations, where strings of PV modules are connected in parallel necessitating complex DC cabling.

中央逆变器一般用于大型的3相逐装置，如串的光伏组件连接在与此同时，迫切需要对复杂的直流电缆。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。