期刊论文

An indirect strong trigger circuit of thyristor for high voltage and large current pulse discharge

中文

工矿自动化

1671-251X

2017

43

3

81-85

10.13272/j.issn.1671-251x.2017.03.019

湖南省科技厅创新引导项目（2015GK3124）；

本校为第一机构

高压大电流放电技术普遍采用晶闸管串联作为电路放电的主开关,放电时如果晶闸管的导通过程较慢,则会导致芯片内部产生大量焦耳热,使晶闸管损坏;同时晶闸管在串联模式下,导通时间不一致也会导致导通较慢的晶闸管受到高电压而被击穿。针对该种复杂苛刻的工况,提出了一种可以用于高压大电流脉冲放电的晶闸管间接强触发电路,该电路利用间接光触发方式,在触发回路中,串联的晶闸管触发信号由同一个控制信号通过光纤进行控制,经过光电转换后产生强触发脉冲电流,使晶闸管同步快速可靠导通。实验结果表明,该电路可实现串联晶闸管可靠触发,晶闸管触发脉宽时间可调,放电电压为9kV,放电电流高达32kA,满足脉冲...

In application of high voltage and large current discharge,thyristor series is widely used as main switch of discharge circuit.If the thyristor conducts slowly,a large number of Joule heat will be produced in chip which leads the thyristor damaged.When thyristors are working in series mode,if the conduction time of thyristors are not consistent,the slower conduction thyristor will be subject to high voltage and breakdown,so the thyristor series must be triggered fast and synchronously.For the above problems,an indirect and strong trigger circuit of thyristor for high voltage and large current ...