GTO器件Δ型吸收电路分析

Analysis on Δtype snubber circuit of GTO device

主要论述了 GTO器件Δ型吸收电路的工作原理 ,提出了各器件的技术要求 ,并提出了一个新观点 ,即在Δ型吸收电路中 ,在电流向吸收电路转移的后半部分 ,把箝位电容转换为直接并联的吸收电容器 ,使吸收电容容量大大增加 ,GTO器件的关断过电压大大降低 ,以提高

Working principle for Δ type snubber circuit of GTO device is probed. Technical specifications for the devices are put forward. A new idea is proposed that in the snubber circuit the clamping capacitor can be turned into directly paralleled snubber capacitor in latter half when the current is converting to the circuit. Thus, the snubber capacitance is dramatically increased, turn off overvoltage of GTO devices is greatly decreased, and reliability is improved.