Faculty Profiles - UEDA Hiroshi

MISC - UEDA Hiroshi

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バルク超電導体を用いた浮上搬送装置の開発-バックヨークの浮上特性への影響-

東谷智史, 土屋賢史, 久藤勇哉, 植田浩史, 石山敦士

低温工学・超電導学会講演概要集 71st 2004

YBCO超電導線材の常電導転移特性評価(数値解析)

牛久裕輔, 仲寛徳, 森崎徹, 柳井正浩, 植田浩史, 塩原融, 飯島康裕, 柿本一臣, 斎藤隆

低温工学・超電導学会講演概要集 71st 2004

Trapped field characteristic of HTS bulk in AC external magnetic field

H Ueda, M Itoh, A Ishiyama

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 13 ( 2 ) 2283 - 2286 2003.6

Language：English Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Although immutable trapped field is required in superconducting bulk applications as a quasipermanent magnet, the trapped field is influenced and changed by time-varying external magnetic field in a realistic operational environment of electrical devices. This means that shielding current distribution within bulk is changed by the time-varying magnetic field and the transient magnetic flux movement results in temperature rise and finally reduction of the trapped field. In this paper, we experimentally investigated the transition of trapped field while applying external AC magnetic field with various amplitude and frequency to a disk-shaped. YBCO bulk. And we also numerically investigate the relationship between characteristic of trapped-field attenuation and shielding current distribution within the bulk using a newly developed simulation Program. This program is based on the finite element method (FEM) considering the voltage-current (E-J) characteristics. It is found that the shielding current distribution is dependent on frequency of AC external field and trapped field attenuation is closely related-to the shielding current.

DOI： 10.1109/TASC.2003.813075

Characteristics of levitating X-Y transporter using HTS bulks

Akamatsu, T., Ueda, H., Ishiyama, A.

IEEE Transactions on Applied Superconductivity 13 ( 2 II ) 2161 - 2164 2003

Language：English Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

High-T-c. superconducting bulk has been used for magnetic levitation systems such as flywheel energy storage system and noncontact transport system. We have been investigating the electromagnetic behavior of high temperature superconductor (HTS) bulks to realize a X-Y (two-dimensional) magnetic levitating transporter without any fixed guides. We have investigated qualitatively the characteristics. of the lift and the restoring force of an YBCO bulk under various field-cooling conditions and permanent-magnet arrangements. In this paper, we evaluate the most suitable 4-permanent-magnet arrangement through lift and restoring force measurements and numerical analysis by the finite element method (FEM) using the current vector potential.

DOI： 10.1109/TASC.2003.813024

Trial production and experiment of linear synchronous actuator with field-cooled HTS bulk secondary

Takahashi, A., Ueda, H., Ishiyama, A.

IEEE Transactions on Applied Superconductivity 13 ( 2 II ) 2251 - 2254 2003

Language：English Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

It is expected that HTS bulk materials can be applied to various electric devices. We have fabricated and tested a linear actuator with a single-sided primary and an HTS bulk secondary. The linear actuator was comprised of a zero-field-cooled YBCO bulk plate tor the secondary (mover) and copper windings with iron core for the primary. In this study, to improve the characteristics of the linear. actuator, we designed and fabricated a double-sided and short-secondary type of linear synchronous actuator which has a field-cooled YBCO bulk plate as a secondary (mover). The static synchronous thrust forces were measured. To evaluate the static characteristics of the linear actuator, we also numerically investigated the electromagnetic behavior within the bulk in an operational environment of the linear actuator by using a computer program based on the finite element method (FEM). The influence of the supercurrent distribution in the bulk on the thrust-angle characteristics of the model linear actuator are discussed.

DOI： 10.1109/TASC.2003.813058

着磁したバルク超電導体を二次側走行子とするリニア同期アクチュエータの試作・実験

佐藤飛鳥, 井比敏男, 植田浩史, 石山敦士

低温工学・超電導学会講演概要集 68th 2003

複数のコイルとバルク超電導体による鉛直方向搬送実験

田代靖貴, 菅原淳史, 鴨志田亮太, 植田浩史, 石山敦士

電気学会全国大会講演論文集 2003 ( 5 ) 2003

着磁されたバルク超電導体の交流磁界印加特性解析

森崎徹, 伊藤学, 植田浩史, 石山敦士

電気学会全国大会講演論文集 2003 ( 5 ) 2003

着磁されたバルク超電導体の交流磁界印加特性の評価

森崎徹, 伊藤学, 植田浩史, 石山敦士

低温工学・超電導学会講演概要集 69th 2003

バルク超電導体を二次側走行子とするリニア同期アクチュエータの始動特性実験

佐藤飛鳥, 井比敏男, 高橋淳, 植田浩史, 石山敦士

電気学会全国大会講演論文集 2003 ( 5 ) 2003

バルク超電導体を用いた浮上搬送装置 2つのバルク体を対向させたときの浮上特性実験と解析

久藤勇哉, 岩本真実, 赤松猛, 植田浩史, 石山敦士

電気学会全国大会講演論文集 2003 ( 5 ) 2003

X-Y Levitating Transporter using HTS Bulks. Levitating Characteristics when using Two HTS Bulks.

赤松猛, 岩本真実, 植田浩史, 石山敦士

電気学会静止器研究会資料 SA-03 ( 18-30.32-33 ) 2003

The Vertical Direction Transport System using YBCO Bulk and Multiple Electromagnets.

鴨志田亮太, 菅原淳史, 植田浩史, 石山敦士

電気学会静止器研究会資料 SA-03 ( 18-30.32-33 ) 2003

系統安定化用SMESを想定した高温超電導コイルの通電特性評価

石山敦士, 植田浩史, 秋田調, 笠原奉文, 高祖聖一

電気学会電力・エネルギー部門大会論文集 14th 2003

有限要素法による着磁されたバルク超電導体の交流磁界印加特性解析

植田浩史, 伊藤学, 森崎徹, 石山敦士

低温工学・超電導学会講演概要集 68th 2003

着磁されたバルク超電導体の交流磁界印加特性

森崎徹, 伊藤学, 植田浩史, 石山敦士

低温工学・超電導学会講演概要集 68th 2003

バルク超電導体を用いた浮上搬送装置-2つのバルク体を対向させたときの浮上特性実験

久藤勇哉, 岩本真実, 植田浩史, 石山敦士

低温工学・超電導学会講演概要集 68th 2003

バルク超電導体を用いた浮上搬送装置-2つのバルク体を対向させたときの浮上特性解析

植田浩史, 岩本真実, 久藤勇哉, 石山敦士

低温工学・超電導学会講演概要集 68th 2003

Y系超電導テープ線材の常電導転移特性

柳井正浩, 曽我部義高, 植田浩史, 石山敦士, 塩原融

低温工学・超電導学会講演概要集 69th 2003

複数のコイルとバルク超電導体による鉛直方向搬送実験

田代靖貴, 菅原淳史, 植田浩史, 石山敦士

低温工学・超電導学会講演概要集 68th 2003

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