一种用于高压大电流脉冲放电的晶闸管间接强触发电路

发布时间：2018-07-11 15:16

本文选题：岩石破碎 + 晶闸管串联　；参考：《工矿自动化》2017年03期

【摘要】：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,满足脉冲放电电源模块的应用要求。
[Abstract]:High voltage and high current discharge technology generally uses thyristor series as the main switch of circuit discharge. If the thyristor conduction process is slow, it will lead to a large amount of Joule heat in the chip, which will damage the thyristor. At the same time, when the thyristor is in series mode, the inconsistency of the conduction time will also lead to the breakdown of the thyristor with slow conduction due to high voltage. A thyristor indirect strong trigger circuit which can be used in high voltage and large current pulse discharge is proposed for this complex and harsh working condition. The circuit uses indirect light trigger mode in the trigger circuit. The trigger signal of thyristor in series is controlled by the same control signal through optical fiber. After photoelectric conversion, strong trigger pulse current is produced, which makes the thyristor synchronous and reliable conduction. The experimental results show that the circuit can trigger thyristor in series reliably, the trigger pulse width of thyristor can be adjusted, the discharge voltage is 9kV, and the discharge current is up to 32kA, which can meet the application requirements of pulse discharge power supply module.
【作者单位】：南华大学电气工程学院;杨村第一中学物理组;
【基金】：湖南省科技厅创新引导项目(2015GK3124)
【分类号】：TN34

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