App Notes
Design and Simulation of a 500W PSFB
In this article, we’ll explain how to design it using Frenetic AI and as bonus, we will talk about our patent for integrating the three magnetics in one.
Why a thermal model? Thermal models play a crucial role in designing and modeling magnetic components
Excessive temperatures can result in the thermal destruction of the device or cause the magnetic material to lose its properties. Therefore, any proposed design must ensure that the device operates within a safe temperature range. Additionally, accurate thermal modeling enables accurate assessment of core and winding losses, which are dependent on temperature variations.
The model utilizes a simplified lumped circuit model to incorporate various heat transfer mechanisms including conduction, radiation, and natural/forced convection. Established physical and empirical formulas have been employed to account for these different heat transfer mechanisms [1].
These models have subsequently been refined using fundamental machine learning techniques to better align with the specific case of power magnetic components. Figure 2 shows the used lumped circuit model for the case of a single chamber inductor.