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快恢复二极管(FRD)、超快恢复二极管(SRD)和肖特基二极管(SBD)是极有发展前途的电力、电子半导体器件。它们具有开关特性好、反向恢复时间短、正向电流大,体积较小、安装简便等优点。可广泛用于开关电源、脉宽调制器(PWM)、不间断电源(UPS)、高频加热、交流电机变频调速等领域,作高频、大电流的续流二极管或整流管。下面介绍它们的性能特点及检测方法。一、性能特点 1.反向恢复时间t_(rr) 反向恢复时间t_(rr)的定义是:电流通过零点由正向转换成反向,再由反向转换到规定低值的时间间隔。它
Fast recovery diodes (FRDs), ultrafast recovery diodes (SRDs), and Schottky diodes (SBDs) are promising semiconductor devices for power and electronics. They have good switching characteristics, reverse recovery time is short, the forward current, smaller, easy to install and so on. Can be widely used in switching power supply, pulse width modulator (PWM), uninterruptible power supply (UPS), high frequency heating, AC motor speed control and other fields for high frequency, high current freewheeling diode or rectifier. The following describes their performance characteristics and testing methods. First, the performance characteristics 1 reverse recovery time t_ (rr) reverse recovery time t_ (rr) is defined as: the current through the zero point from the forward into reverse, and then reverse the transition to the specified low value of the time interval. it