Comments on "A nonideal macromodel of thyristor for transient analysis in power electronic systems

In the above-titled paper by F.J. Gracia et al. (see ibid., vol.37, no.6, p.514-20, 1990) the authors proposed a nonideal macromodel for analog power circuit simulation using SPICE. The model is quite simple and incorporates important second-order effects such as breakover voltage triggering, critical dv/dt, turn-on and turn-off times, threshold gate trigger voltage, and the nonlinear on-state characteristic. The commenter introduces some necessary corrections to the model and proposes some improvements concerning other versions of SPICE and the thermal effects on the breakdown voltage and breakover voltage turn-off characteristics.<>