Permanent Magnet Hybrid Core Inductors for High Saturation Capability

Inductor designs with large dc current relative to ac ripple are often constrained by saturation, which limits their size, loss, and current-carrying capability. Typical saturation-limited designs, though, further handicap performance substantially underutilizing core material's flux carrying capabilities. Instead of operating the across its full swing range from reverse saturation forward these only use half range. To range, we propose a permanent magnet (PM) hybrid in PM provides offset core, boosting effective In proposed is placed outside main winding path reduce losses risk for demagnetization. this work, derive first-order theory analyzing designing core. We then provide some example implementations. Finally, demonstrate working proof-of-concept prototype using off-the-shelf parts that outperforms two comparable ferrite inductor designs. This achieves resistance same energy storage, it 70% more storage than resistance. The prototype's improved thus demonstrates potential advantages