DEVELOPMENT OF MAGNETIC DEVICES FOR IMPROVING THE EFFICIENCY OF LLC TYPE DC-DC CONVERTERS

• Project/Area Number: 15K05933
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Chiba University
• Principal Investigator: SAOTOME Hideo 千葉大学, 大学院工学研究院, 准教授 (50261938)
• Research Collaborator: GORAI Kazuki ; WASHIZU Tatsuki ; AZUMA Keisuke ; KIDUKA Hiroki ; TANAKA Takuma ; TABUCHI Masanobu ; HAMAMOTO Yuki ; OHTA Hiroki ; SUGAWARA Kouhei
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: DC-DCコンバータ / 磁気デバイス

Outline of Final Research Achievements

The iron loss of ferrite is composed of the hysteresis and dynamic magnetic losses. In this study, it was found that the temperature characteristics of the two losses were different. This fact suggests that their generation mechanisms are different and the specifications of DC-DC converters should be determined in consideration of the operational core temperature because the total amount loss depends on the temperature.
An LLC type DC-DC converter was manufactured and the experiments with it showed the ratio of the iron loss of the transformer was approximately 2/3 to the total amount loss of the converter.

Research Products

• [Journal Article] Properties of dynamic magnetic loss of ferrite (2018)
  • Author(s): Saotome Hideo、Azuma Keisuke、Kizuka Hiroki、Tanaka Takuma
  • Journal Title: AIP ADVANCES Volume: 8 Issue: 5 Pages: 056103-056103
  • DOI: 10.1063/1.5003858
  • Peer Reviewed / Open Access
• [Journal Article] Circuit Simulation Model for Ferrite Core Inductor Taking into Accoount Dynamic Magnetic Loss (2017)
  • Author(s): Hideo Saotome, Yuki Hamamoto and Keisuke Azuma
  • Journal Title: IEEE PEDS 2017 Volume: - Pages: 544-549
• [Journal Article] Temperature Characteristics of the Dynamic Magnetic Loss of Ferrite (2017)
  • Author(s): H. Saotome, K. Azuma and Y. Hamamoto
  • Journal Title: J. Magn. Soc. Jpn. Volume: 41
  • Peer Reviewed / Open Access
• [Journal Article] Negative Hypothesis of Equivalence between Dynamic Magnetic Loss and Eddy Current Loss in Ferrite Grains (2016)
  • Author(s): H.Saotome
  • Journal Title: J. Magn. Soc. Jpn. Volume: 40 Pages: 19-21
  • Peer Reviewed / Open Access
• [Presentation] 高電圧比双方向DC-DCコンバータ開発に関する課題の検討 (2018)
  • Author(s): 五来一樹，木塚大貴，田中たく磨，早乙女英夫
  • Organizer: 電気学会・マグネティックス研究会
• [Presentation] Bm依存性を考慮したフェライトの非線形磁化特性のモデリング (2018)
  • Author(s): 鷲巣樹，東啓輔，早乙女英夫
  • Organizer: 電気学会・マグネティックス研究会
• [Presentation] 双方向LLC共振形DC-DCコンバータの伝送電力拡大のための回路定数検討 (2017)
  • Author(s): 木塚 大貴，田渕 正信， 田中 たく磨，早乙女 英夫
  • Organizer: 電気学会マグネティックス研究会
  • Place of Presentation: 東北大学
  • Year and Date: 2017-02-23
• [Presentation] 双方向LLC共振形DC-DCコンバータの伝送電力拡大のための動作モードの検討 (2017)
  • Author(s): 田中 たく磨，木塚 大貴，田渕 正信，早乙女 英夫
  • Organizer: 電気学会マグネティックス研究会
  • Place of Presentation: 東北大学
  • Year and Date: 2017-02-23
• [Presentation] フェライトの動的磁気損失の温度特性とフェライトインダクタの等価回路 (2017)
  • Author(s): 東啓輔，木塚大貴，田中たく磨，早乙女英夫
  • Organizer: 電気学会・マグネティックス研究会
• [Presentation] 動的磁気損失パラメータの測定改善と温度特性 (2016)
  • Author(s): 東 啓輔，濱元 勇樹，早乙女 英夫
  • Organizer: 電気学会マグネティックス研究会
  • Place of Presentation: 九州大学・西新プラザ
  • Year and Date: 2016-12-08
• [Presentation] 動的磁気損失の温度依存性 (2015)
  • Author(s): 濱元勇樹，太田浩樹，早乙女英夫
  • Organizer: 電気学会マグネティックス研究会
  • Place of Presentation: 富山高等専門学校
  • Year and Date: 2015-11-26
• [Presentation] 電流共振型双方向DC-DCコンバータ (2015)
  • Author(s): 田渕正信，菅原幸平，早乙女英夫
  • Organizer: 電気学会マグネティックス研究会
  • Place of Presentation: 秋田大学
  • Year and Date: 2015-11-06
• [Book] パワーマグネティックスのための応用電磁気学 (2015)
  • Author(s): 早乙女英夫，他
  • Total Pages: 341
  • Publisher: 共立出版
• [Funded Workshop] MMM2017 (2017)
• [Funded Workshop] PEDS2017 (2017)