The product of the effective values of the voltage and current with the cosine of the phase Angle between current and voltage in an alternating-current circuit.
伏特量交流电路中电压与电流的有效值以及电流与电压之间相位角的余弦之乘积。
Diodes are electronic devices which rectify alternating current to direct current.
二极管是将交流电整流成直流电的电子装置。
The disadvantage is that reverse electrodialysis produces direct current, whereas the world runs mostly on alternating current.
不足处是反向电渗析产生的是直流电，而世界上主要使用交流电。
The system generates a direct current, so using it to power DC devices locally is more efficient than switching to the alternating current needed to feed it back to the grid.
该系统产生的电流为直流电，所以用来驱动本地的直流点装置比将其转化为交流电输入电网来的更有效率。
Or electricity. In the early 1900s, after the standardization to alternating current distribution, hundreds of small electric utilities were consolidated into huge holding companies.
再举一个电力方面的例子，早在1900年，交流电标准发布以来，成千上万的小型电力公司合并成了大型的控股公司。
Mains electricity in America is supplied as alternating current at 60 Hertz.
在美国，主要供应频率为60赫兹的交流电。
On top of that, the field generated by an alternating current interacts with the ground more strongly than it does with the air.
高空架线的话，由交流电产生的电磁场与地面的感应要比空中的电场交互作用强大得多。
PLUG in your toaster—or your television or your vacuum cleaner—and the electricity that surges through it is an alternating current.
当你为你的吐司炉——或者电视、吸尘器——插好插头、打开电源时，电能便以交流电的形式为这些家用电器供电。
In some parts of the world, cyclists have been powering safety lights for years with devices called bicycle dynamos, which use a generator to create alternating current with every turn of the wheels.
在世界的一些地方，骑自行车的人已经通过叫自行车发电机的装置产生了多年的安全电能。当自行车车轮转动的时候一个装在上面的发电机就会产生交流电。
Some cutting-edge photovoltaic cells offer an even higher initial efficiency but fall behind when the DC power they produce is converted to grid-ready alternating current.
一些先进的光伏电池甚至可以提供更高的效率，但是由于要把直流电源转化为交流电，转换效率有所降低。
This vibration creates an alternating current that can be tapped.
电子振动又产生了可以利用的交变电流。
Alternating current is different from direct current in that it constantly changes its direct of flow.
交流电与直流电的不同之处在于交流电不断地改变其电流流动方向。
Keep in mind, what is shown above on the scope, is Alternating Current, directly out of the alternator.
请记住，什么是上面显示的范围，是交流电，直接的交流发电机。
Battery CHARGER, an electrical device supplied with alternating current, which produces a direct current output for charging the battery on the airplane.
电瓶充电器，用交流电向飞机内电瓶充电的电气装置。带有交流电的电气装置，该装置产生直流电向飞机上的电瓶充电。
Step down transformers provide low voltage AC power for lighting, instruments and other circuits that use alternating current at a lower voltage.
降压变压器低压AC电源提供照明，仪器仪表和其他使用交流电在一个较低的电压的电路。
Alternating current is the current whose direction changes periodically.
交流电是其方向周期地变化的电流。
On the railway of electrization, power supply mode is requested to be the single-phase alternating current.
在铁道电气化牵引区段，牵引供电网采用单相工频交流电供电方式。
For reasons the alternating current is more widely used than the direct current.
由于种种原因，交流电比直流电用得更为广泛。
BUS protection PANEL, a module (black box) containing electrical circuits for control and protection of electrical alternating current supply to the airplane.
汇流条防护板，黑匣子式的组件，内含控制和保护飞机交流电源的电路。
The control effect of electromagnetic force on cylinder wake, lift force and drag force , which was caused by alternating current, is related to its frequency.
而交流电所产生的电磁力对于绕流涡街、升力、阻力的控制作用，则与所使用的频率有关。
This paper briefly introduces a hardware system of the alternating current motor test of the platform with superior natural price ratio.
简略介绍了一种具有优越性价比的交流电机测试平台的硬件系统。
It is common for the direct current circuit to be interfered by alternating current voltage.
直流回路受到交流电压干扰，是控制回路中容易产生的现象。
A device, such as a diode, that converts alternating current to direct current.
整流器；整流管一种将交流电流转化为直流电流的装置，如二极管。
This is an alternating current generator.
这是一台交流发电机。
This is an alternating current generator.
这是一台交流发电机。
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