Shirou Nakamura

Mitsubishi Electric (United States)

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Tadatoshi Yamada

Mitsubishi Electric (Japan)

Shoichi Yokoyama

International Superconductivity Technology Center

Fumihiko Ishikawa

Shikoku Research Institute

Takashi Inaguchi

Mitsubishi Electric (Japan)

K. Shimohata

Mitsubishi Electric (Japan)

Hiromasa Higasa

Shikoku Research Institute

Yasuo Yoshida

Kanazawa University

Takeshi Ono

The University of Tokyo

Takeo Shimizu

Furukawa Electric (United Kingdom)

Motoaki SHIBAYAMA

Shikoku Research Institute

Cooperative Institutions

Mitsubishi Electric (Japan)

Mitsubishi Electric (United States)

Mitsubishi Electric (Germany)

Mitsubishi Group (Japan)

The University of Tokyo

Furukawa Electric (Japan)

Mitsubishi Electric (France)

Kyoto University

Shikoku Research Institute

Kyushu University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Experiment of a 100Wh-Class Power Storage System using High-Tc Superconducting Magnetic Bearing

Springer eBooks (1994)

Hiromasa Higasa Fumihiko Ishikawa Noriyuki Kawauchi Shoichi Yokoyama Shirou Nakamura

Flywheel

Magnetic bearing

Flywheel energy storage

10.1007/978-4-431-68266-0_282

Cite

Citations (9)

Field Operation and Cooling Test of Bismuth-Based Pancake Coil.

TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) (1994)

K. Shimohata Shouichi Yokoyama Takashi Inaguchi Shigeto Fujita Shirou Nakamura

Field operation and cooling test of high Tc coil made of Bi-based pancake coil were carried out. By the measurement of critical current distribution inside the high Tc coil, we found that the critical current of the edge pancake coil is lower than that of the center pancake coil. This result is explained quantitatively in consideration of field and field angle dependence of critical current for the tape-shaped conductor and field distribution inside the coil. Magnet system assembled GM-refrigerator, high Tc current lead and the high Tc coil was tested. As a result, it was found that thermal load into the coil was low and field operation up to 90% of critical current of the high Tc coil was stable.

Coil noise

Bismuth

Coil tap

10.2221/jcsj.29.65

Cite

Citations (2)

A Conceptual Design of a Superconducting Magnet for a Magnetic Levitated Train Using a High Tc Oxide Superconducting Wire

Springer eBooks (1992)

K. Shimohata Toshie Takeuchi Shoichi Yokoyama Hideto Yoshimura Shirou Nakamura

Maglev

Conceptual design

Superconducting wire

10.1007/978-4-431-68195-3_236

Cite

Citations (3)

WDM by multilayered dielectric filter on silica based waveguide (2)

Proceedings of the Society Conference of IEICE (1997)

Tomihiro Watanabe Shirou Nakamura Hiroyuki Koshi Shoichi Ozawa Kazunori Watanabe

Waveguide

Waveguide filter

Source

Cite

Citations (0)

A Feasibility Study of an 8 MWh Flywheel Type Power Storage System using Oxide Superconductors

IEEJ Transactions on Power and Energy (1993)

Hiromasa Higasa Fumihiko Ishikawa Motoaki SHIBAYAMA Takeshi Ono Shoichi Yokoyama

When combined with a magnet having a magnetic field gradient (for example, a permanent magnet), a Y-based oxide superconductor is capable of forming a non-contact bearing with a strong levitational force. Since this bearing exhibits low rotational loss, it is very likely to form a highly efficient power storage system in combination with a flywheel. In this study, an 8 MWh power storage system utilizing a flywheel was conceptually designed to examine its applicability and the possible effects of its introduction. In this study, it was found that this system was an effective power storage.

Flywheel

Flywheel energy storage

Magnetic bearing

10.1541/ieejpes1990.113.7_768

Cite

Citations (3)

EXAMINATION OF AN ALIGNMENT-FREE FIBER CONNECTION TECHNOLOGY ON SILICA BASED WAVEGUIDE

Proceedings of the Society Conference of IEICE (1995)

Tomohiro Watanabe Shirou Nakamura Takashi Shigematsu Takeo Shimizu Hisaharu Yanagawa

Waveguide

Source

Cite

Citations (0)

4K Three-Stage Gifford-McMahon Cycle Refrigerator for MRI Magnet

Advances in cryogenic engineering (1994)

Masashi Nagao Takashi Inaguchi Hideto Yoshimura Shirou Nakamura Tadatoshi Yamada

Cooling capacity

Shields

10.1007/978-1-4615-2522-6_163

Cite

Citations (8)

Mechanical properties of an as-cast heavy-sectioned ferritic spheroidal graphite cast iron

Shirou Nakamura Nobuhiro Sakamoto Katsuya Inoue Keisaku Ōgi Kimio Matsuda

Source

Cite

Citations (0)

The Recent Trends of High Temperature Superconductors. II. High-Tc Superconducting Magnet and Current Lead.

IEEJ Transactions on Industry Applications (1993)

Shirou Nakamura

Lead (geology)

10.1541/ieejias.113.936

Cite

Citations (0)

Verification of thermal stability of the field coil for the 70MW class superconducting generator

IEEJ Transactions on Power and Energy (2000)

K. Shimohata Takashi Inaguchi Masao Morita Shirou Nakamura Susumu Maeda

Superconducting generators have many advantages such as increasing generation efficiency, improving power system stability and reducing size and weight in comparison with conventional generators. 70 MW class superconducting generators are being developed in Japan to verify the basic technologies for a 200 MW class superconducting pilot generator. Manufacture of 70 MW slow response excitation type rotor has begun in 1992 and factory tests were conducted in 1996. Succeeding to the factory tests, the rotor was combined to the stator with air gap windings in the verification test facility in Osaka power station and verification tests were conducted in 1998. The advantages and the reliability of superconducting generators have been clarified in these tests. In this paper, experimental results and analysis of the stability of the superconducting field windings at two kinds of severe tests; a continuous pulse excitation test and a sudden short circuit test are discussed. The main results are summarized as follows. (1) Any quench has not occurred in the severe tests. (2) A calculation method for the temperature rise of the conductor and the helium is developed in order to explain the experimental results. The calculated results agree well with the experimental ones.

Field coil

Superconducting electric machine

Electric generator

10.1541/ieejpes1990.120.6_801

Cite

Citations (1)