Two-Dimensional Numerical Model and Turn-On Performance Simulation of Reversely Switched Dynistor

In this paper, a two-dimensional simulation model of the reversely switched dynistor (RSD) has been introduced in detail. The model has been programmed in MATLAB/Simulink. Different base structures of the RSD are investigated through the model. The relationship between the maximum of turn-on voltage (U_Fmax) and the base structure parameters have been discussed. When the n-base doping concentration increases, the U_Fmax gets a slow decrease at first and rapid increase around 1.0 × 10¹⁵ cm^-3. The U_Fmax decreases when the n-base width or the p-base width decreases. Especially, a dramatic decrease of the U_Fmax can be seen when the p-base width decreases to 70 μm. The experimental results of turn-on current and voltage waveforms have been compared with the simulation results to verify the model.