可控硅串级使用触发电路

摘要

可控硅作为开关元件在高压测控领域中应用越来越多.为了更好的保证高电压作业条件下的人身安全、元器件性能稳定、测试数据更加精准,对可控硅串级使用中电路的改进显得尤为必要.文章利用R-C回路进行了动态均压保护以及并联R的静态均压保护方法,提出了一种在高电压条件下可控硅作为开关元件串级使用的触发电路的改进方法,使可控硅串级触发电路的稳定性有了进一步的提高,解决了使用中容易误触发、不能同步触发、温度过高等缺点.在现场试验中,串级后的可控硅各项性能稳定、可靠.%In the high-pressure measurement and control field, SCR as a switching element in the circuit design is used more and more frequently. In order to better guarantee the personal safety of high-voltage operating conditions, components performance stable, accurate test data, the improvement of the SCR cascade circuit is particularly necessary. Resistor-capacitor circuit by using dynamic voltage protection, as well as parallel resistor static pressurernprotection, the paper proposed an improvement method--a high voltage conditions SCR as a switching elementrncascade trigger circuit, so that the SCR string level trigger circuit stability being further improved to solve the short comings, such as false triggering in use, fail to trigger synchronization, too high temperature etc. In field trials, the performance of SCR cascade proved stable and reliable.