电气工程及其自动化专业英语习题部分翻译

Diodes in power electronic applications carry high currents,withstand high reverse voltages and should possess fast switching characteristics.These requirements render power diodes very different than the ordinary signal diodes.It is also difficult to achieve all the above three characteristics in a single device .Hence,several types of power diodes are available suited for particular applications.
The power diode is a high-current ,high-voltage diode with medium fast switching characteristics.The schottky Barrier diode uses a metal-semiconductor junction and has a lower on-state voltage than the p-i-n diodes.It has the high-current capability and fast switching characteristics but is is a low-voltage device and exhibits a much higher leakage current.These diodes are ideally suited for switch-mode power supplies.The on-state power losses,which are calculated by multiplying the on-state voltage drop by the on-state current,determine the package size of all diodes. . 二极管在电力电子应用