Electronics
Optimizing Perpendicular Flux in PCB Embedded Inductors via Shift-Angle Topologies under DC Excitation
Publié le - 6ème Symposium de Génie Électrique
The integration of magnetic components into printed circuit boards (PCBs) presents a promising solution for enhancing electromagnetic performance while minimizing space and manufacturing complexity in power electronics. A key challenge in this domain is the angular misalignment of inductor turns relative to the magnetic core centerline-often inevitable due to PCB manufacturing constraints. This misalignment distorts the magnetic field, increasing the perpendicular (Z-direction) magnetic flux density through copper traces and leading to elevated eddy current losses, leading to elevated eddy current losses in AC applications.
PCB-embedded solenoid inductors to mitigate electromagnetic losses and optimize inductive performance. To isolate the influence of angular alignment from frequency-dependent phenomena like skin effect, proximity effect, and core losses, simulations were conducted under DC conditions using Ansys Maxwell. Several angular configurations were analyzed to evaluate their effects on flux distribution and eddy current formation. Results indicate that altering the angle alignment significantly impacts flux behavior, with Configuration 2 (A = -Q), featuring two opposite angles symmetrically placed at the midpoint of the turns, demonstrating the lowest flux loss and eddy current dissipation. Experimental validation confirmed the simulation findings, showing electromagnetic losses remained within a 6% margin.
This study confirms that optimizing turn alignment can substantially improve the efficiency of PCB-integrated inductors. Future work will explore further enhancements through advanced winding techniques (e.g., litz wire), alternative geometries (e.g., toroidal shapes), and the integration of active components for high-frequency, highefficiency converter applications.