Thermal Modeling of High-Frequency Inductors

High-frequency inductors are one of the most significant loss contributors in switch mode power supply. However, in making the thermal flow simulation model, it is difficult to model a detailed structure of the high-frequency inductor part such as a choke coil and a transformer due to the calculation cost. Therefore, to find the compact modeling method of an inductor part for switch mode power supply, we investigated the effect of proximity losses which occurs close to the air gap, and the effect of anisotropic effective thermal conductivity in inductor windings on the inductor surface temperature.