1.
Many life processes involve alternating voltages and currents.
许多生命过程涉及到交变电压和交变电流。
2.
Improvement on the demonstration experiment of effect of inductance and capacitance on alternating current;
“电感和电容对交变电流的影响”演示实验的改进
3.
convert (alternating current)to direct current
将（交流电）变成直流电;
4.
DC motor converter set
交流-直流电动变流器组
5.
Conversion of alternating to unidirectional current.
整流交流电转变到单向电流
6.
converts alternating current into direct current or vice versa.
变交流电为直流电或者变直流电为交流电的装置。
7.
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。
8.
AC-electronic motor
离子(变频)式交流电动机
9.
How to Turn an AC Induction Motor into a DC Motor
如何将交流感应电机转变为直流电机
10.
converts the negative half wave of an alternating current into a positive half wave.
把负极半波交流电转变成正极半波交流电。
11.
A device used to convert direct current into alternating current.
反用换流器用于变直流电为交流电的仪器
12.
Choie of "Power Supply System"of Hight-Power A.C Adjustable Speed Motor
大容量交流变速电机驱动“供电制”选择
13.
ElectroMagnetic Compatibility Design of AC/DC/AC Converter Used in Wind Power Generator;
风力发电用交直交变流器电磁兼容性设计
14.
To reverse the direction of(an alternating electric current)each half - cycle to produce a unidirectional current.
变换电流方向颠倒每一半周（交流电流的）方向，以产生单方向性电流
15.
Inverter Type Electric Power Test Stand Based on PLC Control and DEVICENET Network
测试变频电机用的交流变频电力测功机系统
16.
A rotating electric machine with two armatures, used to convert alternating current to direct current.
旋转变流机一种将交流变为直流的带有两个电容器板的旋转电机
17.
Insert the plug of the AC adapter into a wall outlet.
将变压器插头插入交流电源插座
18.
Study of AC Frequency Speed System of Elevator Controlled by PLC;
PLC控制交流变频调速电梯系统的研究