突加大脉冲电流条件下晶闸管关断时间计算  

Calculation of Thyristor Turn-off Time with High Pulse Current

作　　者：刘佳[1] 蒋心怡[1] 庄劲武[1] 王晨[1] 

机构地区：[1]海军工程大学,武汉430033

出　　处：《船电技术》2013年第3期4-6,9,共4页Marine Electric & Electronic Engineering

基　　金：国家自然科学基金(50877078;51177169)

摘　　要：晶闸管作为一种大功率开关器件可应用于新型直流断路器装置,在该类装置中晶闸管的关断是通过注入一个负脉冲电流来实现的,该反向电流的脉冲的宽度由晶闸管关断时间决定。本文分析晶闸管在突加大脉冲电流条件下与稳态通流条件下存储电荷的关系,推导出解析计算式,得到晶闸管在脉冲电流下关断时间计算方法。设计1000A/2500V快速晶闸管在突加大脉冲电流条件下关断时间测试实验得到其关断时间,与计算值进行对比。Thyristor is an ideal high-power switch that is applied to a novel vacuum DC circuit breaker. A reverse pulsed current is injected to turn off the thyristor, and the pulse width is determined by turn-off time. In this paper, the connection between storage charge of thyristor with pulsed current and steady forward current is analyzed, and the mathematical formula is deduced and turn-off time formula is obtained. The test and calculation results of 1000.4/2500 V fast thyristor with pulsed current are compared.

关 键 词：晶闸管 关断时间 脉冲电流 

分 类 号：TM471[电气工程—电器]