交流电：周期性换向的电流，和直流电不一样。
Alternating current (AC) : Flow of electric charge that reverses periodically, unlike direct current.
电磁阀的新生产线，可同时交流和直流电压，同时提高性能。
The new line of solenoid valves accepts both ac and DC voltages while improving performance.
电能是由铺设在屋顶并与变极器和直流电网相连的PV板提供。
The electricity is supplied by roof-mounted PV cells linked to an inverter and a DC net.
输出控制量最终通过舵机和直流电机分别对小车的位置和速度进行控制。
The position and velocity were controlled by servo and the DC motor respectively.
利用纳秒级脉冲电源、毫微秒级脉冲电源和直流电源，进行了电解加工试验。
Nickel is electrochemical micromachininged using nanosecond pulse power, millisecond pulse power and direct current power.
这种模型可以采用和直流电动机动态设计同样的原理进行电流环及速度环的设计。
This model permits the design of the current and speed control loops to adopt the same principles as the dynamic design of armature DC motor drives.
垃圾转运站和直流电动机驱动器组合系统既经济又非常具有竞争性的低功率驱动器。
The RTS drive and DC motor combination is economical and extremely competitive for low-power drive systems.
该仪器测量精度高、抗干扰能力强和性能稳定，已成功地应用在电涡流和直流电力测功机上。
The torque meter has been successfully used on eddy current or DC dynamometer for its high accuracy, good anti-interference and stable performance.
与变频异步电机驱动系统和直流电机调速系统相比，开关磁阻电机驱动系统有着广阔的应用前景。
Comparing with frequency converting driving system for asynchronous machine and adjustable speed for DC motor, the driving system has a wide application foreground.
基于常规直流及柔性直流的多端直流流输电系统和直流电网技术是解决这一问题的有效技术手段之一。
Thee multi-terminal DC transmission system and DC grid technology based on conventional DC and flexible DC are one of the effective technical means to solve this problem.
为降低开关频率和减少开关损失，需增加功率滞环比较器环宽，否则引起瞬时有功功率和直流电压波动，影响系统的性能；
The hysteresis wide is widened for decreasing switching frequency and energy losses, which causes the pulsation of instantaneous active power and direct current voltage.
作者认为利用程控放大器消除光栅信号缺陷的方法，可有效消除信号的幅值不稳定和直流电平漂移，并对信号的可调节范围及精度作了定量分析。
A method which can be used to eliminate the defects of the grating signal has been discussed. The controllable range and accuracy of the signal has been calculated.
使用直流电是产生静电磁场的另一个原因，例如铁路系统使用直流电，电视和计算机屏幕带有阴极放射管。
The use of DC electricity is another source of static electric fields, e.g. rail systems using DC, and televisions and computer screens with cathode ray tubes.
子弹藏有一块小磁铁和一颗芯片，子弹旋转带动小磁铁产生直流电，芯片通过电流波动感知射程的远近。
The bullet has a small magnet inside that lets it generate AC current as it spins and a microprocessor that measures those current oscillations to derive how far it's traveled.
有些厂家虽然使用了5针XLR，但是他们却利用引脚4和引脚5来传输直流电，而本标准并没有这样规定。
Some manufacturers, while using the 5-Pin XLR, decided to use fourth and fifth pins for DC power, not signal data as specified in the standard.
TransCanada公司亦提出要铺设2200英里的高压直流电线路来输送自蒙大拿州和怀俄明州的风能到南部拉斯维加斯及更远。
And TransCanada, Inc., is proposing 2, 200 miles of HVDC lines to carry wind energy from Montana and Wyoming south to Las Vegas and beyond.
与阿波罗的3个电池储备和28伏的直流系统相比，猎户飞船将有6个电池的电力储存，使用120伏的直流电源分配系统。
It will hold six batteries for power storage and will use a 120V DC power distribution system, compared to Apollo’s three-battery storage and 28V DC system.
采用直流电沉积法制备了纳米晶体镍，用TEM和X -射线衍射等方法研究镀镍层的微观结构。
Nanocrystalline nickel was synthesized by direct current electrodeposition. The microstructure of nanocrystalline nickel was studied by TEM and X-ray diffraction.
另外，还对滤波器的结构和参数对输出直流电压脉动和发电机相电流波形的影响及相电流谐波进行了仿真分析。
In addition, the thesis analyzes the influence of the filter structure and parameters on the output DC voltage ripple and the shape of phase currents, as well as harmonics of phase currents.
先进的电子设计提供了诸如操作许多功能，从5月26日伏直流电源，短路保护，输出和EMI噪声阻力。
Advanced electronic design offers many features such as operation from 5-26 volts DC power, short circuit protected outputs, and EMI noise resistance.
文中导出了计算直流电机换向器片间电压分布曲线的基本公式和试验验证；
Basic formulas for the calculation of bar to bar voltage distributing curve of DC motor commutator are derived and test-verified.
木文研究了间接直流电位法（IDC法）和交流电位法（AC法）用于监测疲劳短裂纹扩展速率的有关技术问题。
The technique of measurement of growth, rate of fatigue short crack with indirect KC (IDC) potential system and AC potential system was investigated.
如此，在容限电压法当中，直流电压和和有功功率分别被整流器和反相器所控制。
Thus, in the voltage margin method, the dc voltage and the active power are separately controlled by the rectifier and the inverter, respectively.
在女性14例输出短路保护和经营5伏直流电源。
The F14 outputs are protected from short circuits and operate on 5 VDC power.
处理时间和铝液处理量对直流电处理也有较大的影响，只有在合适的条件下才能得到细小均匀的凝固组织。
Treating time and aluminium mass have also a big effect on DC treatment, and the fine and uniform structure could be obtained only in a appropriate condition.
输出受到保护，短路，和操作5或12伏直流电源。
Outputs are protected from short circuits, and operate on 5 or 12 VDC power.
根据无刷直流电机的数学模型和运行原理，通过MATLAB软件的SIMULINK和PS B模块，搭建了电机及整个控制系统的仿真模型。
According to BLDC mathematical model and the movement principle, a simulation model of BLDCM control system by the SIMULINK and PSB block of software MATLAB is built in this paper.
根据无刷直流电动机的特点和DSP芯片的功能，提出了基于DSP的控制方案。
According to the characteristic of BLDCM and the function of the chip, sensor control solutions which are based on DSP technology are presented.
根据无刷直流电动机的特点和DSP芯片的功能，提出了基于DSP的控制方案。
According to the characteristic of BLDCM and the function of the chip, sensor control solutions which are based on DSP technology are presented.
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