A transient core loss analysis of multiple-gap inductor designed for the 2010 Prius

For a dynamic loss minimization control for DC-to-DC converters, a transient loss analysis of a multiple-gap inductor designed for the 2010 Prius is presented in this paper. A transient core loss calculation algorithm based on an equivalent elliptical loop (EEL) is used for the time domain loss analysis. The algorithm is combined with finite element analysis (FEA), and the core loss and copper loss are calculated separately with a three-dimensional finite element (FE) model. In experiments, the power control unit (PCU) of the Prius that includes the DC-to-DC converter and inverters for traction motors is used to measure the inductor loss. To verify the transient losses, a deadbeat (DB) control for the DC-to-DC converter is developed. After parameter fitting of the FE model with the steady state conditions, simulation results and experimental results in transient conditions are compared to evaluate and document accuracy.