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。

youdao

The frequency control of motor speed is used for alternating current motor of main winch on No1 BF charging system, so that it is possible to carry out control of skip moving speed.

安钢1号高炉主卷扬交流电机采用变频调速技术，实现料车运行调速控制。变频器运行一年多来，未发生过一次故障。

youdao