Computer aided method to analyze parameter sensitivity of switching time of power semiconductors and its application to optimal design for power electronic circuits

In recent years there has been paid much attention to the development of computer aided methods in analysis and design of power electronic circuits because the recent advances of switching power semiconductor devices. In this paper we propose a new and efficient computer aided algorithm for computing parameter sensitivities of turn-on and turn-off instants of power semiconductors for any given power electronic circuits. It is shown that sensitivities of switching instants of power electronic circuits are expressed in terms of parameter sensitivities of voltage and current values by using implicit function theorem. The adjoint network approach based on Tellegen´s theorem is employed for calculating those sensitivities. The optimal circuit design method by making use of the sensitivity calculation is also developed. Their superior performance is demonstrated through some examples by using the implemented computer packages.