| 講演名 | 2018-11-22 [Poster Presentation] An Electromagnetic Field Reduction Method for Inductive Power Transfer in Transportation System Jedok Kim(KAIST), Seungyoung Ahn(KAIST), |
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| PDFダウンロードページ |  PDFダウンロードページへ |
| 抄録(和) | Currently, charging electric transportation systems with wireless power transfer (WPT) technologies are drawing strong attention. The advantages of WPT application to transportation systems are that WPT can provide safety and convenience enhancement compared to the conductive charging methods. There are many types of WPT technologies such as acoustic, light, capacitive, and inductive power transfer (IPT), and usually IPT is used for charging electric transportation system because of their high power capacity and efficiency. However, the IPT system for transportations require to use high electrical power. This means that high density magnetic field would be generated in the vicinity of the IPT system during the operation. If leakage magnetic fields is radiated from IPT system to the human, it will negative influence to human health. Therefore, leakage magnetic field should be minimized for preventing negative effect to human body. In order to reduce leakage magnetic field, shielding methods such as passive shielding and active shielding can be applied. Passive shielding methods could be classified into conductive shielding and magnetic shielding. Conductive shielding method provides high shielding performances, but high heats could be generated because of eddy current. In addition, some magnetic fields are eliminated by eddy losses so power transfer efficiency could be decreased. Magnetic shielding method is to regulate magnetic flux path using ferromagnetic materials. Magnetic shielding provides efficiency enhancement based on their high permeability. However, shielding performance is not effective when magnetic flux paths have air gap. Active shielding is another way to reduce electromagnetic field and this can effectively reduce the leakage magnetic field of high power IPT system. A principle of active shielding is to eliminate leakage magnetic fields by canceling magnetic field, which has the opposite vector direction compare to leakage magnetic field. The active shielding system provides high shielding performance. However, the Active shielding system requires an additional power source for generating canceling magnetic field. This requirement makes system efficiency degradation in terms of total energy consumption because some electrical power should be used for generating canceling magnetic field. Therefore, electromagnetic field reduction method for high power inductive power transfer application (IPT) that can provide high leakage magnetic field reduction performance with minimizing efficiency degradation is necessary. This paper proposes an electromagnetic field reduction method for high power IPT application in transportation system using single reactive shield coil. A reactive shield generates canceling magnetic field by leakage magnetic field so additional power source is not required unlike active shielding system. In addition, reactive shield can provide high shielding performance like active shield system because reactive shield generates canceling magnetic field as well. A proposed reactive shield application method has been verified by EM simulation in terms of total magnetic fields in the vicinity of the transportation IPT system. Simulation results show that the proposed method can effectively reduce leakage magnetic field at observation points. |
| 抄録(英) | Currently, charging electric transportation systems with wireless power transfer (WPT) technologies are drawing strong attention. The advantages of WPT application to transportation systems are that WPT can provide safety and convenience enhancement compared to the conductive charging methods. There are many types of WPT technologies such as acoustic, light, capacitive, and inductive power transfer (IPT), and usually IPT is used for charging electric transportation system because of their high power capacity and efficiency. However, the IPT system for transportations require to use high electrical power. This means that high density magnetic field would be generated in the vicinity of the IPT system during the operation. If leakage magnetic fields is radiated from IPT system to the human, it will negative influence to human health. Therefore, leakage magnetic field should be minimized for preventing negative effect to human body. In order to reduce leakage magnetic field, shielding methods such as passive shielding and active shielding can be applied. Passive shielding methods could be classified into conductive shielding and magnetic shielding. Conductive shielding method provides high shielding performances, but high heats could be generated because of eddy current. In addition, some magnetic fields are eliminated by eddy losses so power transfer efficiency could be decreased. Magnetic shielding method is to regulate magnetic flux path using ferromagnetic materials. Magnetic shielding provides efficiency enhancement based on their high permeability. However, shielding performance is not effective when magnetic flux paths have air gap. Active shielding is another way to reduce electromagnetic field and this can effectively reduce the leakage magnetic field of high power IPT system. A principle of active shielding is to eliminate leakage magnetic fields by canceling magnetic field, which has the opposite vector direction compare to leakage magnetic field. The active shielding system provides high shielding performance. However, the Active shielding system requires an additional power source for generating canceling magnetic field. This requirement makes system efficiency degradation in terms of total energy consumption because some electrical power should be used for generating canceling magnetic field. Therefore, electromagnetic field reduction method for high power inductive power transfer application (IPT) that can provide high leakage magnetic field reduction performance with minimizing efficiency degradation is necessary. This paper proposes an electromagnetic field reduction method for high power IPT application in transportation system using single reactive shield coil. A reactive shield generates canceling magnetic field by leakage magnetic field so additional power source is not required unlike active shielding system. In addition, reactive shield can provide high shielding performance like active shield system because reactive shield generates canceling magnetic field as well. A proposed reactive shield application method has been verified by EM simulation in terms of total magnetic fields in the vicinity of the transportation IPT system. Simulation results show that the proposed method can effectively reduce leakage magnetic field at observation points. |
| キーワード(和) | Inductive Power Transfer / Electromagnetic Field Reduction / Electromagnetic Shielding / Wireless Power Transfer / Electromagnetic Compatibility / Transportation Electrification |
| キーワード(英) | Inductive Power Transfer / Electromagnetic Field Reduction / Electromagnetic Shielding / Wireless Power Transfer / Electromagnetic Compatibility / Transportation Electrification |
| 資料番号 | EMCJ2018-75 |
| 発行日 | 2018-11-15 (EMCJ) |
| 研究会情報 | |
| 研究会 | EMCJ / IEE-EMC / IEE-MAG |
|---|---|
| 開催期間 | 2018/11/22(から2日開催) |
| 開催地（和） | KAIST（韓国大田市） |
| 開催地（英） | KAIST |
| テーマ（和） | EMC Joint Workshop 2018, Daejon |
| テーマ（英） | EMC Joint Workshop 2018, Daejon |
| 委員長氏名（和） | 和田 修己(京大) / 山崎 健一(電中研) / 山口 正洋(東北大) |
| 委員長氏名（英） | Osami Wada(Kyoto Univ.) / Ken-ichi Yamazaki(Central Research Institute of Electric Power Industory) / Masahiro Yamaguchi(Tohoku Univ.) |
| 副委員長氏名（和） | 王 建青(名工大) |
| 副委員長氏名（英） | Kensei Oh(Nagoya Inst. of Tech.) |
| 幹事氏名（和） | 青柳 貴洋(東工大) / 白木 康博(三菱電機) / 石上 忍(東北学院大) / 池畑 政輝(鉄道総研) / 小原 学(明治大) / 山田 啓壽(東芝) |
| 幹事氏名（英） | Takahiro Aoyagi(Tokyo Inst. of Tech.) / Yasuhiro Shiraki(Mitsubishi Electric) / Shinobu Ishigami(Tohoku Gakuin Univ.) / Masateru Ikehata(RTRI) / Gaku Obara(Meji Univ.) / Keiju Yamada(Toshiba Co.) |
| 幹事補佐氏名（和） | 長澤 忍(三菱電機) / 山本 真一郎(兵庫県立大) / 鵜生 高徳(デンソー) / 井渕 貴章(大阪大) |
| 幹事補佐氏名（英） | Shinobu Nagasawa(Mitsubishi Electric) / Shinichiro Yamamoto(Univ. of Hyogo) / Takanori Unou(Denso) / Takaaki Ibuchi(Osaka Univ.) |
| 講演論文情報詳細 | |
| 申込み研究会 | Technical Committee on Electromagnetic Compatibility / Technical Meeting on Electromagnetic Compatibility / Technical Meeting on Magnetics |
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| 本文の言語 | ENG |
| タイトル（和） | |
| サブタイトル（和） | |
| タイトル（英） | [Poster Presentation] An Electromagnetic Field Reduction Method for Inductive Power Transfer in Transportation System |
| サブタイトル（和） | |
| キーワード(1)（和/英） | Inductive Power Transfer / Inductive Power Transfer |
| キーワード(2)（和/英） | Electromagnetic Field Reduction / Electromagnetic Field Reduction |
| キーワード(3)（和/英） | Electromagnetic Shielding / Electromagnetic Shielding |
| キーワード(4)（和/英） | Wireless Power Transfer / Wireless Power Transfer |
| キーワード(5)（和/英） | Electromagnetic Compatibility / Electromagnetic Compatibility |
| キーワード(6)（和/英） | Transportation Electrification / Transportation Electrification |
| 第 1 著者 氏名（和/英） | Jedok Kim / Jedok Kim |
| 第 1 著者 所属（和/英） | Korea Advanced Institute of Science and Technology(略称：KAIST) Korea Advanced Institute of Science and Technology(略称：KAIST) |
| 第 2 著者 氏名（和/英） | Seungyoung Ahn / Seungyoung Ahn |
| 第 2 著者 所属（和/英） | Korea Advanced Institute of Science and Technology(略称：KAIST) Korea Advanced Institute of Science and Technology(略称：KAIST) |
| 発表年月日 | 2018-11-22 |
| 資料番号 | EMCJ2018-75 |
| 巻番号（vol） | vol.118 |
| 号番号（no） | EMCJ-317 |
| ページ範囲 | pp.53-53(EMCJ), |
| ページ数 | 1 |
| 発行日 | 2018-11-15 (EMCJ) |