A Detailed Extraction Procedure of Thyristor Design Parameters

Abstract

Before manufacturing, designers of power electronic systems use more and more computer simulation. The reduced computing cost and precision of power component models are essential for the accurate simulation of the power electronic systems to predict their electrical behavior. The accurate simulations of power electronic systems are based on the one hand on the knowledge of power component design parameters not published by manufacturers and on the other hand on a very good description of the arrangement and position of devices including the electromagnetic compatibility (EMC) contributions. In this chapter, through a study considering an experimental circuit of a switching cell including a Thyristor under test controlled by a MOSFET transistor, it is checked that a simple wiring inductance as the circuit wiring representation is insufficient to obtain accurate simulation results. Therefore, a suitable wiring model of the switching cell circuit is developed taking into account the wiring parasitic inductances of the layout and the mutual effects between them. Then, using the accurate model of the switching cell circuit, a detailed extraction procedure of the Thyristor design parameters is developed. This extraction procedure is based on a comparative study between experimental and simulated results, considering the physics of component. Finally a good agreement is obtained between experimental and simulated results confirming the validity of the developed extraction procedure as well as the suitable wiring model of the switching cell circuit.