Abstract
In this letter, a planar magnetically integrated inductor design method is proposed for a direct coupled three-phase interleaved Buck converter(3-phase IBC) with a three-pointed star (TPS) core geometry. Through a comparative analysis of various magnetic core structures, a TPS core featuring magnetic integration is selected, and the air gap positions are determined to effectively mitigate the eddy current loss on the PCB windings introduced by the fringing flux. Following this, the winding arrangement of the planar inductor is systematically analyzed, and an improved layout scheme is proposed, which significantly improves magnetic coupling and reduces inductor core losses. Finally, a 2 kW 3-phase IBC prototype with a peak efficiency of 98.3% is built and tested. The results validate the effectiveness of the proposed design method and its theoretical analysis.
| Original language | English |
|---|---|
| Journal | IEEE Transactions on Power Electronics |
| Volume | 41 |
| Issue number | 1 |
| Pages (from-to) | 121-126 |
| ISSN | 0885-8993 |
| DOIs | |
| Publication status | Published - 2026 |
Keywords
- Air gap distribution
- Direct coupled
- Magnetical integrated inductor
- Winding arrangement