微机控制高频脉冲列实现晶闸管“双窄脉冲触发”的研究与应用  

Research and Application of Realizing Thyristor Trigger Using 'Double Narrow Pulse' by the Microcomputer Control High-frequency Pulse Column

作　　者：刘觉民[1] 付义[1] 向增[1] 秦攀[1] 祖映翔[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2011年第12期40-45,共6页Journal of Hunan University:Natural Sciences

基　　金：湖南省科技计划项目(2011CK3067;2011GK3132);'中央高校基本科研业务费'能力培养类项目(2009)

摘　　要：运用冲量定理深入分析了高频脉冲列触发晶闸管的机理;通过建立励磁回路和晶闸管触发回路数学模型,由晶闸管开通时间、擎住电流、励磁回路与触发回路模型参数等数据,计算出感性负载下晶闸管触发的最小脉冲宽度和高频脉冲列周期与脉宽,据此设计出微机控制高频脉冲列晶闸管'双窄脉冲触发'程序.样机试验表明,晶闸管三相可控整流桥各路高频脉冲列和励磁电压波形稳定、对称性好,晶闸管触发精度高,达到励磁装置设计要求.By using impulse theorem, we have analyzed the mechanism of trigger thyristor by high-frequency pulse instead of width pulse .Through the establishment of an excitation circuit and a trigger thyristor circuit mathematical model and with the thyristor switch time, latching current, perceptual load and pulse transformer model parameters, we have calculated the thyristor conduction of minimum pulse width,cycle and pulse-width of equivalent high-frequency pulse column. Accordingly, we have designed thyristor ＂double narrow pulse triggering＂ program based on microcomputer control high-frequency pulse column. A prototype test waveforms and data of trigger microcomputer excitation system have shown that high-frequency pulse column and the excitation voltage waveform of three-phase controlled thyristor rectifier bridge rostrum are stable and have good symmetry. Also, the excitation voltage is stable and continuously adjustable. It has satisfied the requirements of wide pulse triggering.

关 键 词：高频脉冲列 冲量定理 脉冲变压器 双窄脉冲触发 感性负载 

分 类 号：TM76[电气工程—电力系统及自动化]