Design of an Optimum Thyristor Snubber Circuit with Turn-off Model

다이리스터의 Turn-off 모델을 이용한 최적 Snubber 회로 설계

The thyristor turn-off model plays an important part in the design of thyristor snubber circuit. However, it is difficult to determine the thyristor turn-off characteristics. In this paper two methods to establish the simple thyristor turn-off model are proposed based on the reverse recovery characteristics given in the data sheets. Using the simple thyristor turn-off model, the optimum thyristor snubber circuit design procedures are presented considering maximum voltage spike, maximum reverse dv/dt, and turn-off loss.