simulink如何建立反激变压器

初次接触SIMULINK仿真电源,用mutual inductance模块建立的反激变压器报错,Inductive branch 'winding2 Mutual Inductance' is in series with current source or nonlinear element modeled as current source,请问有熟悉用SIMLULINK仿电源的兄弟么?有没有其他方法建立反激变压器?