Design and modeling of planar magnetic inductors for power converters applications

Ammouri, Aymen; Salah, Tarek Ben; Kourda, Ferid

doi:10.1109/icmic.2015.7409474

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…Although a spiral structure has good heat dissipation, it cannot effectively reduce the leakage flux generated between the windings because the windings have the very different inductance per turn. Therefore, the spiral structure is susceptible to the proximity effect, resulting in high AC resistance [14,15]. The AC resistance due to the proximity effect increases with increasing frequency.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Alternating‐Current Resistance and Heat Generation of Spiral Inductors with Magnetic Sealing Technique

Shimura

Kanaya

Kobayashi

et al. 2023

IEEJ Transactions Elec Engng

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As direct current-direct current (DC-DC) converters increase their power density, their inductors require a planar structure with good heat dissipation. Planar inductors use rectangular wires or substrate patterns for their windings. Winding structures can be stacked, in which the structures are on top of each other; spiral, in which the windings are configured in the same plane; or composite structures of both. Here, the authors clarify the alternating-current (AC) resistance of inductors with different winding structures and propose a magnetic sealing technique (MST) that reduces the AC resistance of low-profile spiral inductors. Magnetic field simulation revealed the effect of MST on the AC resistance and inductance. Furthermore, spiral inductors with MST were fabricated, and the AC resistance reduction effect of MST was confirmed with impedance analyzer. The heat-generation reduction effect in an MST inductor was demonstrated in a 1-MHz 100 V/320 V 800-W boost DC-DC converter prototype with GaN devices.

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Section: Introductionmentioning

confidence: 99%