Operation characteristics of a buck/boost converter using a layered inductor with high resistive Fe(CoFe)-M-O (M = Hf,Zr,rare-earth) films

Yoshito Sasaki; Sumihito Morita; Takashi Hatanai; Akihiro Makino; Toshiro Sato; Kiyohito Yamasawa

Operation characteristics of a buck/boost converter using a layered inductor with high resistive Fe(CoFe)-M-O (M = Hf,Zr,rare-earth) films

Yoshito Sasaki, Sumihito Morita, Takashi Hatanai, Akihiro Makino, Toshiro Sato, Kiyohito Yamasawa

Research output: Contribution to journal › Conference article › peer-review

Abstract

Fe(CoFe)-M-O (M = Hf, Zr, rare-earth) films have excellent soft magnetic properties at a high frequency for their high electrical resistivity. Layered inductors using the magnetic films have a low loss at a high frequency. Accordingly, the DC-DC converter using these layered inductors exhibit a high efficiency for the high frequency drive. Layered inductor using nanocrystalline Fe₆₁Hf₁₃O₂₆ and Co₄₄Fe₁₉Hf₁₅O₂₂ film exhibit the Q of 8.4 and 12.3 at 5 MHz. The micro DC-DC converter using nanocrystalline Fe₆₁Hf₁₃O₂₆ film and Co₄₄Fe₁₉Hf₁₅O₂₂ film exhibit the maximum efficiency of 83.5% and 86% in the boost converter driving at 5 MHz. Furthermore, thin film inductor using Fe₅₅Hf₁₁O₃₄ film which size of 3.5 mm² exhibits L of 950 nH and Q of 6.6 at 5 MHz. Then, they are evident that high resistive nanocrystalline Fe(CoFe)-Hf-O films are effective for the high frequency micro DC-DC converter.

Original language	English
Pages (from-to)	1555-1560
Number of pages	6
Journal	PESC Record - IEEE Annual Power Electronics Specialists Conference
Volume	2
Publication status	Published - 1998 Jan 1
Externally published	Yes
Event	Proceedings of the 1998 IEEE 29th Annual Power Electronics Specialists Conference, PESC. Part 2 (of 2) - Fukuoka, Jpn Duration: 1998 May 18 → 1998 May 21

ASJC Scopus subject areas

Modelling and Simulation
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Operation characteristics of a buck/boost converter using a layered inductor with high resistive Fe(CoFe)-M-O (M = Hf,Zr,rare-earth) films. / Sasaki, Yoshito; Morita, Sumihito; Hatanai, Takashi; Makino, Akihiro; Sato, Toshiro; Yamasawa, Kiyohito.

In: PESC Record - IEEE Annual Power Electronics Specialists Conference, Vol. 2, 01.01.1998, p. 1555-1560.

Research output: Contribution to journal › Conference article › peer-review

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abstract = "Fe(CoFe)-M-O (M = Hf, Zr, rare-earth) films have excellent soft magnetic properties at a high frequency for their high electrical resistivity. Layered inductors using the magnetic films have a low loss at a high frequency. Accordingly, the DC-DC converter using these layered inductors exhibit a high efficiency for the high frequency drive. Layered inductor using nanocrystalline Fe61Hf13O26 and Co44Fe19Hf15O22 film exhibit the Q of 8.4 and 12.3 at 5 MHz. The micro DC-DC converter using nanocrystalline Fe61Hf13O26 film and Co44Fe19Hf15O22 film exhibit the maximum efficiency of 83.5% and 86% in the boost converter driving at 5 MHz. Furthermore, thin film inductor using Fe55Hf11O34 film which size of 3.5 mm2 exhibits L of 950 nH and Q of 6.6 at 5 MHz. Then, they are evident that high resistive nanocrystalline Fe(CoFe)-Hf-O films are effective for the high frequency micro DC-DC converter.",

author = "Yoshito Sasaki and Sumihito Morita and Takashi Hatanai and Akihiro Makino and Toshiro Sato and Kiyohito Yamasawa",

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AU - Sasaki, Yoshito

AU - Morita, Sumihito

AU - Hatanai, Takashi

AU - Makino, Akihiro

AU - Sato, Toshiro

AU - Yamasawa, Kiyohito

PY - 1998/1/1

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N2 - Fe(CoFe)-M-O (M = Hf, Zr, rare-earth) films have excellent soft magnetic properties at a high frequency for their high electrical resistivity. Layered inductors using the magnetic films have a low loss at a high frequency. Accordingly, the DC-DC converter using these layered inductors exhibit a high efficiency for the high frequency drive. Layered inductor using nanocrystalline Fe61Hf13O26 and Co44Fe19Hf15O22 film exhibit the Q of 8.4 and 12.3 at 5 MHz. The micro DC-DC converter using nanocrystalline Fe61Hf13O26 film and Co44Fe19Hf15O22 film exhibit the maximum efficiency of 83.5% and 86% in the boost converter driving at 5 MHz. Furthermore, thin film inductor using Fe55Hf11O34 film which size of 3.5 mm2 exhibits L of 950 nH and Q of 6.6 at 5 MHz. Then, they are evident that high resistive nanocrystalline Fe(CoFe)-Hf-O films are effective for the high frequency micro DC-DC converter.

AB - Fe(CoFe)-M-O (M = Hf, Zr, rare-earth) films have excellent soft magnetic properties at a high frequency for their high electrical resistivity. Layered inductors using the magnetic films have a low loss at a high frequency. Accordingly, the DC-DC converter using these layered inductors exhibit a high efficiency for the high frequency drive. Layered inductor using nanocrystalline Fe61Hf13O26 and Co44Fe19Hf15O22 film exhibit the Q of 8.4 and 12.3 at 5 MHz. The micro DC-DC converter using nanocrystalline Fe61Hf13O26 film and Co44Fe19Hf15O22 film exhibit the maximum efficiency of 83.5% and 86% in the boost converter driving at 5 MHz. Furthermore, thin film inductor using Fe55Hf11O34 film which size of 3.5 mm2 exhibits L of 950 nH and Q of 6.6 at 5 MHz. Then, they are evident that high resistive nanocrystalline Fe(CoFe)-Hf-O films are effective for the high frequency micro DC-DC converter.

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