一种基于集成运放的有源型晶闸管过压触发电路

To address the supply chain bottleneck of imported high-voltage breakover diodes (BOD), this paper proposes a BOD-free high-speed overvoltage triggering circuit using op-amps and OTL complementary amplifiers. Experimental validation on a 1200V thyristor platform confirms its accuracy, speed, and reliability compared to BOD-based protection.

转折二极管BOD(breakover diode)因其良好的伏安特性与温度特性,已成为晶闸管过电压保护的常用方案.目前,高压BOD主要由一些外国公司垄断,为解决卡脖子问题,提出1种无BOD的高速过压触发电路,该电路是由运算放大器、无输出变压器OTL(output transformer less)互补对称放大电路等构成的高速信号处理与放大电路,可实现快速过压检测和保护.最后,在实验室搭建了 1 200V晶闸管过压触发电路实验平台,并与BOD触发方案进行对比,充分验证了本方案的准确性、高速性、可靠性.