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Embedded Flexible Fe–Si–Al Powder Composite Film Inductor for Low Power DC–DC Converters

Title
Embedded Flexible Fe–Si–Al Powder Composite Film Inductor for Low Power DC–DC Converters
Author
김희준
Keywords
Flexible inductor; Fe-Si-Al powder composite film; flexibility; flexible boost converter; inductor embedded DC-DC boost converter
Issue Date
2018-04
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, v. 28, No. 3, Article no. 1100105
Abstract
This paper describes the construction of an embedded flexible inductor using Fe-Si-Al powder composite films with a mu(r) of 140, and proposes a low-power dc-dc converter using this inductor. The fabricated composite films are composed of mixed 85% Fe-9% Si-6% Al flaked powders, and ethylene propylene diene monomer rubber, which is a terpolymer with rigid polymer structure used in low-power applications. The proposed flexible inductor is simulated using Maxwell three-dimensional tool and measured out by folding the fabricated flexible inductor (to 0 degrees, 45 degrees, 90 degrees, and above 90 degrees). It has also been confirmed that the inductance of a flexible inductor has good linearity at a high frequency of several MHz. To verify its usefulness, the proposed inductor with dimensions of 10 mm x 7 mm x 0.28 mm was applied to a dc-dc boost converter fabricated on a flexible printed circuit board of size 10 mm x 23 mm x 0.16 mm. The output power of the fabricated dc-dc boost converter was 2 W (5 V/400 mA) and the switching frequency was fixed at 1.2 MHz. On testing, the fabricated dc-dc boost converter recorded a maximum efficiency of 84%. Additionally, the flexibility of the fabricated embedded flexible inductor was verified by folding it (to 0 degrees, 45 degrees, 90 degrees, and above 90 degrees). Thus, the excellent flexibility of the fabricated embedded flexible inductor was proved.
URI
https://ieeexplore.ieee.org/abstract/document/8259285http://repository.hanyang.ac.kr/handle/20.500.11754/99124
ISSN
1051-8223; 1558-2515
DOI
10.1109/TASC.2018.2793918
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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