This paper examines the interaction between the traction motor and inverter, focusing on how motor design influences the inverter’s thermal behavior. Using a framework combining network theory, structural equation modeling (SEM), and sensitivity analysis, analytical models for a three-phase induction motor and inverter thermal behavior are developed. Global and local sensitivity analyses identify key parameters affecting inverter temperature and quantify their dependencies. The framework simplifies subsystem interdependencies, enabling designers to anticipate change propagation and optimize early-stage design, reducing iteration cycles and improving efficiency.