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汉语拼音：jiāo liú diàn

方向和强度作周期性变化的电流。

1. 指大小和方向随时间作周期性变化的电流。我国通用的交流电是五十赫兹正弦交流电，即电流按正弦波形每秒钟周期性变化五十次。交流电的优点是可以通过变压器按需要改变电压。

• In Europe, AC is usually generated at 50 Hz.

  欧洲的交流电输出频率通常为50赫兹。

• Either direct or alternating current may be used for driving electric trains.

  直流电和交流电都可用来驱动电气火车.

• Alternating current reverses from negative to positive about 60 times a second.

  交流电由负到正一秒钟大约变换六十次.

• This high frequency alternating current produces the high frequency radio waves mentioned in the previous chapter.

  这种高频交流电流产生前一章提到过的高频无线电波.

• A device used to convert current into alternating current.

  反用换流器用于变直流电为交流电的仪器.

• Electronic instrument generally uses rectified and filtered AC current as power source.

  电子仪器的电源,一般由交流电整流滤波而来.

• A. C . can be changed into D, C . or vice versa.

  交流电能变成直流电, 反过来直流电也能变成交流电.

• Plug in the AC adapter and restart your notebook.

  插入交流电适配器并重新启动笔记本电脑.

• Are comprised of three - phase AC systems operating essentially at constant voltage.

  由稳态电压下的 三相 交流电运行系统组成.

• The AC outlet is housed in robust aluminum housing.

  该交流电插座封装在坚固的铝制外壳内.

• Alternating current is the current whose direction changes periodically.

  交流电是其方向周期地变化的电流.

• This type of MP 3 player cannot be connected to alternating current.

  这款MP3播放机不可以直接插交流电使用.

• The NIBCO NEV series solenoid valves are 110 VAC, NAMUR standard units.

  NIBCO尼伯克NEV系列电磁阀是110伏交流电, NAMUR标准装置.

• A rectifier is a device which changes AC to DC.

  整流器是一种将交流电转变为直流电的装置.

• Arcs more readily than AC welders, with longer arcing.

  起弧比交流电容易, 电弧加长一倍.