The switching process of thyristor has been analyzed from the aspects of transmission carrier and carrier density. The effect of high current triggering on switching characteristics of triggered thyristor is investigated. Based on fast switching characteristics and flow capacity, high current trigger circuit has been designed. The relationship of switching characteristics with different triggering current and operation voltages has been studied. The experiment results indicate that the switching time of thyristor is determined by triggering mode and operation voltage. The delay time and breakdown time can be shortened by high current mode and high operation voltage, respectively, which can improve the switching characteristics efficiently.%从载流子的传输过程和载流子数密度两个方面分析了晶闸管触发开通过程,研究了强触发方式对晶闸管开通特性的影响.利用功率MOSFET的快开通特性和通流能力,设计了晶闸管强触发电路,并通过晶闸管开通特性实验平台研究了触发条件和工作电压两个因素与晶闸管开通时间的关系.实验结果表明:晶闸管开通时间决定于触发方式和工作电压,强触发方式可以缩短延迟时间,高工作电压可以减小导通时间,利用强触发方式和提高工作电压能够有效地改善晶闸管的开通性能.
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