Version 230315
Research Subjects
Ongoing Project
Characterization of the permanent magnet field synchronous motor (2016-)
Estimation of an electric motor in Cryocooler as an electrical machinery is attemped.
It was revealed that the permanent magnet field synchronous motor (SMPM) included in a cold head isn't driven under high power factor. Steady-state performance of SMPM has been analized.
Line trace wheelchair (2009-)
It's possible to whom press a run button to follow the course set beforehand by the line trace wheelchair. A field of activities of the person who can't steer a wheelchair freely is expanded remarkably. The former study has been advanced to a design and making of a conceptual design and a line-detector with a linear position indication.
Superconducting Fault Current Limiter (1988-)
Current limiting device is the electric power equipment to which a design of transmission and distribution system is changed from foundation. It starts with 4 winding fault current limiting transformer, non-inductive winding-type SFCL, a rectifier-type SFCL, a shield-type SFCL, a thin film type SFCL, etc. are being also considered experimentally.
Purpose
R & D of proposed saturable DC reactor type Superconducting Fault Current Limiter (SFCL).
Current Status
Four winding transformer which has fault current limitting ability with NbTi wire was tested.
Non-inductive laboratory made current limiter (49 KB) was tested.
Shield type SFCL with oxide superconductor tube was tested.
Pointed out that some of the elements connected in series do not turn into limiting mode.
Unrespected limitation occurs, when the load increase in bridge type SFCL without internal DC current source.
Papers
Taichi Nishihara, Tsutomu Hoshino, Masaru Tomita: ``Analysis of FCL effect cased by superconducting DC cable for railway system under short circuit'', Materials Science and Engineering (MSE), to be published.
Taichi Nishihara, Tsutomo Hoshino, Masaru Tomita: ``FCL Effect of DC Superconducting Cables in Unsteady State'', IEEE Transactions on Applied Superconductivity, Vol. 99, no. 07828095 (2017.6) to be published. DOI: 10.1109/TASC.2017.2656632
Taichi Nishihara, Tsutomu Hoshino, Masaru Tomita: ``Analysis of superconducting systems in DC railway Systems'', Program Schedule and Abstract Book, Applied Superconductivity Conference 2016 (ASC2016), No. 3LPo2L-03, pp. 1198 (2016.9)
Taichi Nishihara, Tsutomu Hoshino, Masaru Tomita: ``Analysis of FCL effect cased by superconducting DC cable for railway system under short circuit'', 26th International Cryogenic Engineering Conference \& International Cryogenic Materials Conference 2016 (ICEC26-ICMC2016), No. 9-P2-158 (2016.3.9)
Taichi Nishihara, Tsutomu Hoshino, Masaru Tomita: ``Study on Temperature Analysis of DC Superconducting Cables for Railway Systems'', 平成28年電気学会全国大会論文集, Vol. 5, No. 5-117 (2016.3.5)
Taichi Nishihara, Hayaki Miyashita, Masatoyo Shibuya, Tsutomu Hoshino, Jumpei Baba, Toshiya Kumagai: ``Heat capacity measurement and simulation analysis of the thermal conductivity of YBCO thin film'', 平成27年電気学会全国大会論文集, Vol. 5. No. 5-092 (2015.3.5)
Hayaki Miyashita, Taichi Nishihara, Tsutomu Hoshino, Jumpei Baba: ``薄膜型限流素子の電位・温度分布変化の可視化'', 第90回2014年度秋季低温工学・超電導学会講演概要集, 2P-p28, pp. 141 (2014.11)
T. Nishihara, Hayaki Miyashita, T. Nitta, T. Hoshino, Masatoyo Shibuya, S. Kawachi, Jumpei Baba and Toshiya Kumagai: ``Voltage and temperature coincidental measurements of YBCO thin film device'', 7th Asian Conference on Applied Superconductivity and Cryogenics, Abstract and Program Book, 196, pp. 139 (2013.10)
Hiroki Saito: ``鉄心挿入リアクトルに関する考察'', Master Thesis, Memsei University (2009.2)
Tomohiko Asakawa:``限流器用コイルのインダクタンス調整'', Bachelor Thesis, Memsei University (2007.12)
Tsutomu Hoshino, Kei Sakamoto, Takahiko Sato: ``Preliminary Design of Rectifier Type Fault Current Limiter with Shield Type Variable Reactor Using Nb-Ti/Nb/Cu Laminate Cylinder'', Applied Superconductivity Conference 2006 (ASC2006), No. 5LI02 (2006.9.1)
Tsutomu Hoshino: ``Preliminary Test of Rectifier Type Fault Current Limiter with Shield Type Variable Reactor Using Nb-Ti/Nb/Cu Laminate Cylinde'', Asian Conference 2005 on Applied Superconductivity and Cryogenics, OS1 (2005.12.13)
Tsutomu Hoshino, Itsuya Muta, Taketsune Nakamura, Khosru M. Salim, and Masato Yamada: ``Non-Inductive Variable Reactor Design and Computer Simulation of Rectifier Type Superconducting Fault Current Limiter'', IEEE Transactions on Applied Superconductivity, Vol. 15, No. 2, pp. 2063 -- 2066 (2005.6)
Takahiko Sato, Tsutomu Hoshino, Taketsune Nakamura, Masato Yamada: ``Nb-Ti/Nb/Cu積層円筒を遮蔽に用いる可変リアクトル整流器型限流器の試作'', 平成17年電気学会全国大会講演論文集, Vol. 5, No. 5-038, pp. 43 (2005.3.19)
Kei Sakamoto: ``超電導積層円筒を遮蔽に用いる100 V 10 A級可変リアクトル整流器型超電導限流器の設計'', Bachelor Thesis, Memsei University (2005.12)
Khosru Mohammad Salim, Tsutomu Hoshino, Itsuya Muta, Taketsune Nakamura and Masato Yamada: ``Low Voltage Test of a Single Bridge Rectifier Type Superconducting Fault Current Limiter with Non-Inductive Reactor'', Institute of Physics Conference Series, Vol. 181, Applied Superconductivity 2003: Proceedings of the 6th European Conference on Applied Superconductivity, Sorrento, Italy, 14-18 September 2003, pp. 811 -- 818 (2004.12)
Tsutomu Hoshino, Itsuya Muta, Taketsune Nakamura, Khosru Mohammad Salim, and Masato Yamada: ``Variable Reactor Design and Computer Simulation of Rectifier Type Superconducting Fault Current Limiter with a Non-Inductive Reactor'', Applied Superconductivity Conference 2004 (ASC04), 4LG11, Jacksonville, FL, USA (2004.10.7)
Tsutomu Hoshino, Khosru Mohammad Salim, Itsuya Muta, Taketsune Nakamura, Masato Yamada: ``Experiment Using Variable Reactor of Rectifier Type Superconducting Fault Current Limiter With a Short-Circuited Trigger Coil'', IEEE Transactions on Applied Superconductivity, Vol. 14, No. 2, pp. 626 -- 629 (2004.6)
Taketsune Nakamura, 藤田健一, Khosru Mohammad Salim, 鄭憲俊, Itsuya Muta, Tsutomu Hoshino, Masato Yamada: ``Bi-2223円筒体を可変リアクトルに適用した整流型高温超電導限流器小形モデルの理論的・実験的特性評価'', 電気学会超電導応用電力機器研究会資料, No. ASC-04-44, pp. 1 -- 6 (2004.6.18)
Tsutomu Hoshino, Khosru Mohammad Salim, Itsuya Muta, Taketsune Nakamura, Masato Yamada: ``無誘導リアクトルを用いた整流器型限流器の三相限流特性計算'', 電気学会超電導応用電力機器研究会資料, No. ASC-04-43, pp. 69 -- 72 (2004.6.17)
Taketsune Nakamura，藤田健一, Tsutomu Hoshino, Itsuya Muta, Masato Yamada: ``Bi-2223 バルク円筒体を適用した可変リアクトル整流型超電導限流器の特性評価(1) -有限要素法による理論的考察'', 第70回2004年度春季低温工学・超電導学会講演概要集, 2B-a01, pp. 99 (2004.5.25)
Taketsune Nakamura，K.M. Salim, 藤田健一, 鄭憲俊, Tsutomu Hoshino, Itsuya Muta, Masato Yamada: ``Bi-2223 バルク円筒体を適用した可変リアクトル整流型超電導限流器の特性評価(2) -小形モデルによる実験結果'', 第70回2004年度春季低温工学・超電導学会講演概要集, 2B-a02, pp. 100 (2004.5.25)
Tsutomu Hoshino, K.M. Salim, Itsuya Muta, Taketsune Nakamura, Masato Yamada, 山中敦彦: ``ダイニーマ製レーストラックッコイルの試作と限流器への適用'', 第70回2004年度春季低温工学・超電導学会講演概要集, 1B-a09, pp. 22 (2004.5.24)
Tsutomu Hoshino, K.M. Salim, Itsuya Muta, Taketsune Nakamura, Masato Yamada: ``無誘導リアクトル整流器型限流器の限流特性計算'', 第70回2004年度春季低温工学・超電導学会講演概要集, 1B-a10, pp. 23 (2004.5.24)
Itsuya Muta，Taketsune Nakamura, Tsutomu Hoshino: ``Fundamental Study on DC Saturable Reactor Type Fault Current Limiter'', Research Report for KEPCO (2004.3.15)
T. Hoshino, K.M. Salim, I. Muta, T. Nakamura, M. Yamada: ``Experiment using Variable Reactor of Rectifier Type Superconducting Fault Current Limiter with a Short-Circuited Trigger Coil'', 18th International Conference on Magnet Technology, 2A-p04, Morioka, Japan 20-24 October 2003, to be published in IEEE Transactions on Applied Superconductivity.
K.M. Salim, T. Hoshino, I. Muta, T. Nakamura, M. Yamada: ``Low Voltage Test of a Single Bridge Rectifier Type Superconducting Fault Current Limiter with Non-Inductive Reactor'', European Conference on Applied Superconductivity 2003, September 14-18, 2003, Sorrento Napoli, Italy, to be published in Proceedings of EUCAS2003.
K.M. Salim, I. Muta, T. Hoshino, A. Kawasaki, T. Nakamura: ``Proposal of Rectifier Type Fault Current Limiter with Non-Inductive Reactor (SFCL)'', Cryogenics, Vol. 44, No. 3, pp. 171-176 (2004.3)
I. Muta, T. Hoshino, K.M. Salim, A. Kawasaki, T. Nakamura: ``Proposal of DC shield reactor type superconducting fault current limiter'', Cryogenics, Vol. 44, No. 3, pp. 177-182 (2004.3)
I. Muta, T. Doshita, T. Nakamura, T. Egi, T. Hoshino: ``Influences of Superconducting Fault Current Limiter (SFCL) on Superconducting Generator in One-Machine Double-Line System'', IEEE Transactions on Applied Superconductivity, Vol. 13, No. 3, pp. 2206 -- 2209 (2003.6)
T. Hoshino, K.M. Salim, A. Kawasaki, I. Muta, T. Nakamura, M. Yamada: ``Design of 6.6 kV, 100 A Saturated DC Reactor Type Superconducting Fault Current Limiter'', IEEE Transactions on Applied Superconductivity, Vol. 13, No. 3, pp. 2012 -- 2015 (2003.6)
K.M. Salim, T. Hoshino, M. Nishikawa, I. Muta, T. Nakamura: ``Preliminary Experiments on Saturated DC Reactor Type Fault Current Limiter'', IEEE Transactions on Applied Superconductivity, Vol. 12, No. 1, pp. 872 -- 875 (2002.3)
T. Hoshino, K. M. Salim, M. Nishikawa, I. Muta, T. Nakamura: ``Proposal of saturated DC reactor type superconducting fault current limiter (SFCL)'', Cryogenics, Vol. 41, No. 7, pp. 469 -- 474 (2001.7)
T. Hoshino, M. Nishikawa, K. M. Salim, T. Nakamura, I. Muta: ``Preliminary studies on characteristics of series-connected resistive type superconducting fault current limiter for system design'', Physica C, Vol. 354, No. 1 -- 4, pp. 120 -- 124 (2001.5)
T. Hoshino, I. Muta, H. Tsukiji, K. Ohkubo, M. Etoh: ``Recovery Time of Superconducting Non-Inductive Reactor Type Fault Current Limiter'', IEEE Transactions on Magnetics, Vol. 32, No. 4, pp. 2403 -- 2406 (1996.7)
T. Hoshino, I. Muta, M. Baba: ``Preliminary Study on Non-Inductive Reactor Type Fault Current Limiter'', Cryogenics, Vol. 34, No. ICEC Supplement, pp. 753 -- 756 (1994.9)
T. Hoshino, I. Muta: ``Load Test on Superconducting Transformer and Fault Current Limiting Devices for Electric Power System'', IEEE Transactions on Magnetics, Vol. 30, No. 4, pp. 2018 -- 2021 (1994.7)
I. Muta, Y. Morita, T. Hoshino, K. Ogura: ``Preliminary Study on Superconducting Transformer and Fault Current Limiting Devices for Electric Power System'', Proceedings of China International Conference on Electrical Machines, pp. 12 -- 15 (1991.9)
Purpose
R & D of proposed saturable DC reactor type Superconducting Fault Current Limiter (SFCL).
Current Status
Four winding transformer which has fault current limitting ability with NbTi wire was tested.
Non-inductive laboratory made current limiter (49 KB) was tested.
Shield type SFCL with oxide superconductor tube was tested.
Pointed out that some of the elements connected in series do not turn into limiting mode.
Unrespected limitation occurs, when the load increase in bridge type SFCL without internal DC current source.
Papers
Taichi Nishihara, Tsutomu Hoshino, Masaru Tomita: ``Analysis of FCL effect cased by superconducting DC cable for railway system under short circuit'', Materials Science and Engineering (MSE), to be published.
Taichi Nishihara, Tsutomo Hoshino, Masaru Tomita: ``FCL Effect of DC Superconducting Cables in Unsteady State'', IEEE Transactions on Applied Superconductivity, Vol. 99, no. 07828095 (2017.6) to be published. DOI: 10.1109/TASC.2017.2656632
Taichi Nishihara, Tsutomu Hoshino, Masaru Tomita: ``Analysis of superconducting systems in DC railway Systems'', Program Schedule and Abstract Book, Applied Superconductivity Conference 2016 (ASC2016), No. 3LPo2L-03, pp. 1198 (2016.9)
Taichi Nishihara, Tsutomu Hoshino, Masaru Tomita: ``Analysis of FCL effect cased by superconducting DC cable for railway system under short circuit'', 26th International Cryogenic Engineering Conference \& International Cryogenic Materials Conference 2016 (ICEC26-ICMC2016), No. 9-P2-158 (2016.3.9)
Taichi Nishihara, Tsutomu Hoshino, Masaru Tomita: ``Study on Temperature Analysis of DC Superconducting Cables for Railway Systems'', 平成28年電気学会全国大会論文集, Vol. 5, No. 5-117 (2016.3.5)
Taichi Nishihara, Hayaki Miyashita, Masatoyo Shibuya, Tsutomu Hoshino, Jumpei Baba, Toshiya Kumagai: ``Heat capacity measurement and simulation analysis of the thermal conductivity of YBCO thin film'', 平成27年電気学会全国大会論文集, Vol. 5. No. 5-092 (2015.3.5)
Hayaki Miyashita, Taichi Nishihara, Tsutomu Hoshino, Jumpei Baba: ``薄膜型限流素子の電位・温度分布変化の可視化'', 第90回2014年度秋季低温工学・超電導学会講演概要集, 2P-p28, pp. 141 (2014.11)
T. Nishihara, Hayaki Miyashita, T. Nitta, T. Hoshino, Masatoyo Shibuya, S. Kawachi, Jumpei Baba and Toshiya Kumagai: ``Voltage and temperature coincidental measurements of YBCO thin film device'', 7th Asian Conference on Applied Superconductivity and Cryogenics, Abstract and Program Book, 196, pp. 139 (2013.10)
Hiroki Saito: ``鉄心挿入リアクトルに関する考察'', Master Thesis, Memsei University (2009.2)
Tomohiko Asakawa:``限流器用コイルのインダクタンス調整'', Bachelor Thesis, Memsei University (2007.12)
Tsutomu Hoshino, Kei Sakamoto, Takahiko Sato: ``Preliminary Design of Rectifier Type Fault Current Limiter with Shield Type Variable Reactor Using Nb-Ti/Nb/Cu Laminate Cylinder'', Applied Superconductivity Conference 2006 (ASC2006), No. 5LI02 (2006.9.1)
Tsutomu Hoshino: ``Preliminary Test of Rectifier Type Fault Current Limiter with Shield Type Variable Reactor Using Nb-Ti/Nb/Cu Laminate Cylinde'', Asian Conference 2005 on Applied Superconductivity and Cryogenics, OS1 (2005.12.13)
Tsutomu Hoshino, Itsuya Muta, Taketsune Nakamura, Khosru M. Salim, and Masato Yamada: ``Non-Inductive Variable Reactor Design and Computer Simulation of Rectifier Type Superconducting Fault Current Limiter'', IEEE Transactions on Applied Superconductivity, Vol. 15, No. 2, pp. 2063 -- 2066 (2005.6)
Takahiko Sato, Tsutomu Hoshino, Taketsune Nakamura, Masato Yamada: ``Nb-Ti/Nb/Cu積層円筒を遮蔽に用いる可変リアクトル整流器型限流器の試作'', 平成17年電気学会全国大会講演論文集, Vol. 5, No. 5-038, pp. 43 (2005.3.19)
Kei Sakamoto: ``超電導積層円筒を遮蔽に用いる100 V 10 A級可変リアクトル整流器型超電導限流器の設計'', Bachelor Thesis, Memsei University (2005.12)
Khosru Mohammad Salim, Tsutomu Hoshino, Itsuya Muta, Taketsune Nakamura and Masato Yamada: ``Low Voltage Test of a Single Bridge Rectifier Type Superconducting Fault Current Limiter with Non-Inductive Reactor'', Institute of Physics Conference Series, Vol. 181, Applied Superconductivity 2003: Proceedings of the 6th European Conference on Applied Superconductivity, Sorrento, Italy, 14-18 September 2003, pp. 811 -- 818 (2004.12)
Tsutomu Hoshino, Itsuya Muta, Taketsune Nakamura, Khosru Mohammad Salim, and Masato Yamada: ``Variable Reactor Design and Computer Simulation of Rectifier Type Superconducting Fault Current Limiter with a Non-Inductive Reactor'', Applied Superconductivity Conference 2004 (ASC04), 4LG11, Jacksonville, FL, USA (2004.10.7)
Tsutomu Hoshino, Khosru Mohammad Salim, Itsuya Muta, Taketsune Nakamura, Masato Yamada: ``Experiment Using Variable Reactor of Rectifier Type Superconducting Fault Current Limiter With a Short-Circuited Trigger Coil'', IEEE Transactions on Applied Superconductivity, Vol. 14, No. 2, pp. 626 -- 629 (2004.6)
Taketsune Nakamura, 藤田健一, Khosru Mohammad Salim, 鄭憲俊, Itsuya Muta, Tsutomu Hoshino, Masato Yamada: ``Bi-2223円筒体を可変リアクトルに適用した整流型高温超電導限流器小形モデルの理論的・実験的特性評価'', 電気学会超電導応用電力機器研究会資料, No. ASC-04-44, pp. 1 -- 6 (2004.6.18)
Tsutomu Hoshino, Khosru Mohammad Salim, Itsuya Muta, Taketsune Nakamura, Masato Yamada: ``無誘導リアクトルを用いた整流器型限流器の三相限流特性計算'', 電気学会超電導応用電力機器研究会資料, No. ASC-04-43, pp. 69 -- 72 (2004.6.17)
Taketsune Nakamura，藤田健一, Tsutomu Hoshino, Itsuya Muta, Masato Yamada: ``Bi-2223 バルク円筒体を適用した可変リアクトル整流型超電導限流器の特性評価(1) -有限要素法による理論的考察'', 第70回2004年度春季低温工学・超電導学会講演概要集, 2B-a01, pp. 99 (2004.5.25)
Taketsune Nakamura，K.M. Salim, 藤田健一, 鄭憲俊, Tsutomu Hoshino, Itsuya Muta, Masato Yamada: ``Bi-2223 バルク円筒体を適用した可変リアクトル整流型超電導限流器の特性評価(2) -小形モデルによる実験結果'', 第70回2004年度春季低温工学・超電導学会講演概要集, 2B-a02, pp. 100 (2004.5.25)
Tsutomu Hoshino, K.M. Salim, Itsuya Muta, Taketsune Nakamura, Masato Yamada, 山中敦彦: ``ダイニーマ製レーストラックッコイルの試作と限流器への適用'', 第70回2004年度春季低温工学・超電導学会講演概要集, 1B-a09, pp. 22 (2004.5.24)
Tsutomu Hoshino, K.M. Salim, Itsuya Muta, Taketsune Nakamura, Masato Yamada: ``無誘導リアクトル整流器型限流器の限流特性計算'', 第70回2004年度春季低温工学・超電導学会講演概要集, 1B-a10, pp. 23 (2004.5.24)
Itsuya Muta，Taketsune Nakamura, Tsutomu Hoshino: ``Fundamental Study on DC Saturable Reactor Type Fault Current Limiter'', Research Report for KEPCO (2004.3.15)
T. Hoshino, K.M. Salim, I. Muta, T. Nakamura, M. Yamada: ``Experiment using Variable Reactor of Rectifier Type Superconducting Fault Current Limiter with a Short-Circuited Trigger Coil'', 18th International Conference on Magnet Technology, 2A-p04, Morioka, Japan 20-24 October 2003, to be published in IEEE Transactions on Applied Superconductivity.
K.M. Salim, T. Hoshino, I. Muta, T. Nakamura, M. Yamada: ``Low Voltage Test of a Single Bridge Rectifier Type Superconducting Fault Current Limiter with Non-Inductive Reactor'', European Conference on Applied Superconductivity 2003, September 14-18, 2003, Sorrento Napoli, Italy, to be published in Proceedings of EUCAS2003.
K.M. Salim, I. Muta, T. Hoshino, A. Kawasaki, T. Nakamura: ``Proposal of Rectifier Type Fault Current Limiter with Non-Inductive Reactor (SFCL)'', Cryogenics, Vol. 44, No. 3, pp. 171-176 (2004.3)
I. Muta, T. Hoshino, K.M. Salim, A. Kawasaki, T. Nakamura: ``Proposal of DC shield reactor type superconducting fault current limiter'', Cryogenics, Vol. 44, No. 3, pp. 177-182 (2004.3)
I. Muta, T. Doshita, T. Nakamura, T. Egi, T. Hoshino: ``Influences of Superconducting Fault Current Limiter (SFCL) on Superconducting Generator in One-Machine Double-Line System'', IEEE Transactions on Applied Superconductivity, Vol. 13, No. 3, pp. 2206 -- 2209 (2003.6)
T. Hoshino, K.M. Salim, A. Kawasaki, I. Muta, T. Nakamura, M. Yamada: ``Design of 6.6 kV, 100 A Saturated DC Reactor Type Superconducting Fault Current Limiter'', IEEE Transactions on Applied Superconductivity, Vol. 13, No. 3, pp. 2012 -- 2015 (2003.6)
K.M. Salim, T. Hoshino, M. Nishikawa, I. Muta, T. Nakamura: ``Preliminary Experiments on Saturated DC Reactor Type Fault Current Limiter'', IEEE Transactions on Applied Superconductivity, Vol. 12, No. 1, pp. 872 -- 875 (2002.3)
T. Hoshino, K. M. Salim, M. Nishikawa, I. Muta, T. Nakamura: ``Proposal of saturated DC reactor type superconducting fault current limiter (SFCL)'', Cryogenics, Vol. 41, No. 7, pp. 469 -- 474 (2001.7)
T. Hoshino, M. Nishikawa, K. M. Salim, T. Nakamura, I. Muta: ``Preliminary studies on characteristics of series-connected resistive type superconducting fault current limiter for system design'', Physica C, Vol. 354, No. 1 -- 4, pp. 120 -- 124 (2001.5)
T. Hoshino, I. Muta, H. Tsukiji, K. Ohkubo, M. Etoh: ``Recovery Time of Superconducting Non-Inductive Reactor Type Fault Current Limiter'', IEEE Transactions on Magnetics, Vol. 32, No. 4, pp. 2403 -- 2406 (1996.7)
T. Hoshino, I. Muta, M. Baba: ``Preliminary Study on Non-Inductive Reactor Type Fault Current Limiter'', Cryogenics, Vol. 34, No. ICEC Supplement, pp. 753 -- 756 (1994.9)
T. Hoshino, I. Muta: ``Load Test on Superconducting Transformer and Fault Current Limiting Devices for Electric Power System'', IEEE Transactions on Magnetics, Vol. 30, No. 4, pp. 2018 -- 2021 (1994.7)
I. Muta, Y. Morita, T. Hoshino, K. Ogura: ``Preliminary Study on Superconducting Transformer and Fault Current Limiting Devices for Electric Power System'', Proceedings of China International Conference on Electrical Machines, pp. 12 -- 15 (1991.9)
Finished Project