Feasible Evaluations of Coupled Multilayered Chip Inductor for POL Converters
-
- Imaoka Jun
- Shimane University
-
- Kimura Shota
- Shimane University
-
- Itoh Yuki
- Shimane University
-
- Martinez Wilmar
- Shimane University
-
- Yamamoto Masayoshi
- Shimane University
-
- Suzuki Michiaki
- TAIYO YUDEN CO., LTD
-
- Kawano Kenji
- TAIYO YUDEN CO., LTD
この論文をさがす
抄録
Point of load (POL) converters require a small size and high-efficiency performance for IT industrial applications. In addition, the interleaved technique, magnetic integration, and application of GaN FETs are well known as good approaches to satisfy these demands in the power converters. Although coupled inductors for POL converters have been proposed in several studies, a coupled multilayered chip inductor has not been examined because of the difficulty of its construction. In this paper, a novel coupled multilayered chip inductor for interleaved POL converters is proposed. This novel coupled inductor has a pair of windings with inverse coupling in the magnetic core. Further, the magnetic material of the coupled inductor is an Fe-based metal composite powder (Fe-Si-Cr). Additionally, an Fe-based powder in the magnetic core has been processed with electrical insulation by a highly crystallized oxide nanolayer in order to reduce the eddy-current losses. Finally, the high efficiency performance of the coupled multilayered chip inductor is evaluated by prototypes of interleaved buck converters using normally off-type GaN FETs with a switching frequency of 1MHz.
収録刊行物
-
- IEEJ Journal of Industry Applications
-
IEEJ Journal of Industry Applications 4 (3), 126-135, 2015
一般社団法人 電気学会
