May be there is a indirect work around. You extract the file in MATLAB and then MATLAB can directly give the transfer function. It appears SimCoupler fuses PSIM with Matlab/Simulink by providing an interface for co-simulation.

Dear Dr. Ahmad,

welcome,

Would you please define the transfer function of any circuit you intend?

Do mean the transfer function of a linear circuit in the S-DOMIAN H(s)? H(s) is defined only for linear circuits not for any circuit. Then if you have any nonlinear elements in your circuit such as diodes and transistors, then you have to linearize such elements around certian DC operating point and represent the element by its linear model.

The PSIM is based on circuit analysis by solving  node equations of the circuit numerically, so, it may not contain an analytical tool to derive an expression for H(s).

However you can get the frequency response of the circuit H(jw) and transform it to H(s).

Best wishes

Thank you Dr Kavirayani 

Prof. Zekry

Thank you very much for your response and explanations.