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。
Current reversing key 电流换向开关
However , at turn - off , the diode current reverse for a reverse recovery time trr before falling to zero 然而在关断时,二极管的电流在降至零之前有一个反向恢复时间。
A type of micro - ohmmeter based on the technique of current reversed 4 - line impedance measurement is designed , which can be testified to meet the requirement and have a good repeated accuracy 摘要设计一种基于四线制电流倒向技术的微弱电阻测量仪,经实验验证,该测量仪可以很好地满足测量要求,并具有良好的重复测量精度。
Industrial ct machine can get the entire data of one part without damaging it and save the data in bit images . it is the focus point of current reverse engineering that how to re - manufacture the part from the industrial ct slice images 工业ct机能无损地获取零件完整的信息,它输出的数据是以位图图像的形式保存的。如何由工业ct切片图像将零件原型重新制造出来是目前逆向工程领域研究的热点。