電気システム工学部門

研究成果 1979 2019

1989
10 引用 (Scopus)

Quench analysis in a 72 kVA superconducting four-winding power transformer

Iwakuma, M., Funaki, K., Kanetaka, H., Tasaki, K., Takeo, M. & Yamafuji, K., 1 1 1989, : : Cryogenics. 29, 11, p. 1055-1062 8 p.

研究成果: ジャーナルへの寄稿記事

Power transformers
transformers
propagation
Superconducting cables
propagation velocity
1 引用 (Scopus)

Voltage resonant buck-boost converter using multi-layer-winding transformer

Shoyama, M., Harada, K., Saen, H. & Moriya, M., 12 1 1989, : : PESC Record - IEEE Annual Power Electronics Specialists Conference. 2, p. 895-901 7 p.

研究成果: ジャーナルへの寄稿Conference article

Transformer windings
Transformer
acceleration (physics)
Converter
transformers
1988
48 引用 (Scopus)

Ac inductive measurement of intergrain and intragrain currents in high-tc oxide superconductors

Ni, B., Munakata, T., Matsushita, T., Iwakuma, M., Funaki, K., Takeo, M. & Yamafuji, K., 1 1 1988, : : Japanese Journal of Applied Physics. 27, 9 R, p. 1658-1662 5 p.

研究成果: ジャーナルへの寄稿記事

Oxide superconductors
Current density
current density
oxides
Magnetic flux
1 引用 (Scopus)

Conversion efficiency of a large-β DC-SQUID with a resistively shunted inductance

Kohjiro, S., Enpuku, K., Yoshida, K. & Yamafuji, K., 1 1 1988, : : Japanese Journal of Applied Physics. 27, 2R, p. 214-218 5 p.

研究成果: ジャーナルへの寄稿記事

SQUIDs
inductance
Inductance
Conversion efficiency
direct current
23 引用 (Scopus)

Critical transport current density in sintered oxide superconductors with high critical temperature

Matsushita, T., Ni, B., Sudo, Y., Iwakuma, M., Funaki, K., Takeo, M. & Yamafuji, K., 1 1 1988, : : Japanese Journal of Applied Physics. 27, 6R, p. 929-936 8 p.

研究成果: ジャーナルへの寄稿記事

Oxide superconductors
Volume fraction
critical temperature
Current density
current density
8 引用 (Scopus)

Experimental study of noise characteristics of large-β dc SQUID with resistively shunted inductance

Kohjiro, S., Enpuku, K., Yoshida, K. & Yamafuji, K., 1 1 1988, : : Japanese Journal of Applied Physics. 27, 10 R, p. 1871-1874 4 p.

研究成果: ジャーナルへの寄稿記事

SQUIDs
inductance
Inductance
Josephson junctions
critical current
38 引用 (Scopus)

Flux-flow-type Josephson oscillator for millimeter and submillimeter wave region. IV. Thin-film coupling

Qin, J., Enpuku, K. & Yoshida, K., 12 1 1988, : : Journal of Applied Physics. 63, 4, p. 1130-1135 6 p.

研究成果: ジャーナルへの寄稿記事

submillimeter waves
millimeter waves
oscillators
thin films
electrodes
45 引用 (Scopus)

Phase-Controlled DC-AC Converter with High-Frequency Switching

Harada, K., Sakamoto, H. & Shoyama, M., 1 1 1988, : : IEEE Transactions on Power Electronics. 3, 4, p. 406-411 6 p.

研究成果: ジャーナルへの寄稿記事

Switching frequency
Switches
Uninterruptible power systems
Electric commutation
Electric power systems
3 引用 (Scopus)

Spatial distribution of trapped magnetic flux in the high-tcsuperconductor y1ba2cu3oii. comparison with the critical state model

Kiss, T., Enpuku, K., Yoshida, K., Takeo, M. & Yamafuji, K., 1 1 1988, : : Japanese Journal of Applied Physics. 27, 7A, p. L1287-L1289

研究成果: ジャーナルへの寄稿記事

Magnetic flux
Spatial distribution
magnetic flux
spatial distribution
Superconducting materials
1987

17 TESLA SUPERCONDUCTING MAGNET WITH MULTIFILAMENTARY SUPERCONDUCTORS.

Takeo, M., Funaki, K., Sato, S., Yamafuji, K., Iwakuma, M., Hiramatsu, M., Matsumoto, K. & Hamada, M., 1 1 1987, : : IEEE Transactions on Magnetics. MAG-23, 2

研究成果: ジャーナルへの寄稿記事

Superconducting magnets
Superconducting materials
Magnets
Quenching
Magnetic fields
29 引用 (Scopus)

A superconducting sub-structure in sintered ybacu3o7-x plates

Funaki, K., Iwakuma, M., Sudo, Y., Ni, B., Kiss, T., Matsushita, T., Takeo, M. & Yamafuji, K., 1987, : : Japanese Journal of Applied Physics. 26, 9A, p. 1445-1447 3 p.

研究成果: ジャーナルへの寄稿記事

Magnetization
magnetization
Magnetic fields
magnetic fields
4 引用 (Scopus)

Development of Nb3Sn superconducting wires for AC use

Yamafuji, K., Iwakuma, M., Tomita, Y. & Funaki, K., 1 1 1987, : : IEEE Transactions on Magnetics. 23, 2, p. 1355-1358 4 p.

研究成果: ジャーナルへの寄稿記事

Superconducting wire
Wire
Powder metallurgy
Cables
Availability

DEVELOPMENT OF Nb 3 Sn SUPERCONDUCTING WIRES FOR AC USE.

Yamafuji, K., Iwakuma, M., Tomita, Y., Funaki, K., Sumiyoshi, F., Fukutsuka, T., Ogawa, R., Miyatake, T. & Matsumoto, K., 1 1 1987, : : IEEE Transactions on Magnetics. MAG-23, 2

研究成果: ジャーナルへの寄稿記事

Superconducting wire
Wire
Powder metallurgy
Cables
3 引用 (Scopus)

Effects of kinetic inductance on the performance of a flux-flow-type josephson amplifier

Hashimoto, T., Enpuku, K., Yoshida, K. & Yamafuji, K., 1 1 1987, : : Japanese Journal of Applied Physics. 26, 11 A, p. L1874-L1876

研究成果: ジャーナルへの寄稿記事

inductance
Inductance
amplifiers
Fluxes
Kinetics
38 引用 (Scopus)

Estimate of attainable critical current density in superconducting yba2cu3o7-ै

Matsushita, T., Iwakuma, M., Sudo, Y., Ni, B., Kiss, T., Funaki, K., Takeo, M. & Yamafuji, K., 1 1 1987, : : Japanese Journal of Applied Physics. 26, 9A, p. 1524-1526 3 p.

研究成果: ジャーナルへの寄稿記事

Critical current density (superconductivity)
Flux pinning
Oxide superconductors
Electron scattering
Twinning
6 引用 (Scopus)

Integrated gradiometer with large β SQUID

Yoshida, K., Kohjiro, S., Enpuku, K. & Yamafuji, K., 1 1 1987, : : IEEE Transactions on Magnetics. 23, 2, p. 1106-1109 4 p.

研究成果: ジャーナルへの寄稿記事

SQUIDs
Damping
Magnetic couplings
Inductance
Degradation
10 引用 (Scopus)

Josephson analog amplifier with large current gain

Yoshida, K., Hashimoto, T., Nagatsuma, T. & Enpuku, K., 1 1 1987, : : IEEE Transactions on Magnetics. 23, 2, p. 723-726 4 p.

研究成果: ジャーナルへの寄稿記事

Transducers
Magnetic fields
Fluxes
Tunnel junctions
Electric potential
8 引用 (Scopus)

Millimeterwave emission from josephson oscillator through thin film junction electrode

Yoshida, K., Nagatsuma, T., Kumataka, S. & Enpuku, K., 1 1 1987, : : IEEE Transactions on Magnetics. 23, 2, p. 1283-1286 4 p.

研究成果: ジャーナルへの寄稿記事

Thin films
Electrodes
Tunnel junctions
Fluxes
Detectors
2 引用 (Scopus)

On the Effective Turn-Off of GTO by a Small Saturable Core

Harada, K., Sakamoto, H. & Shoyama, M., 1 1 1987, : : IEEE Transactions on Power Electronics. PE-2, 1, p. 20-27 8 p.

研究成果: ジャーナルへの寄稿記事

Magnetic cores
Inductance
Capacitance
Energy utilization
Networks (circuits)
1 引用 (Scopus)

Performance of Large-β SQUID with a Damping Resistance

Enpuku, K., Kohjiro, S. & Yoshida, K., 1 1987, : : Japanese Journal of Applied Physics. 26, S3-2, p. 1647-1648 2 p.

研究成果: ジャーナルへの寄稿記事

SQUIDs
Damping
damping
shunts
inductance
16 引用 (Scopus)

PHASE CONTROLLED DC-AC CONVERTER WITH HIGH FREQUENCY SWITCHING.

Harada, K., Sakamoto, H. & Shoyama, M., 1987, : : Unknown Journal. p. 13-19 7 p.

研究成果: ジャーナルへの寄稿記事

Switching frequency
Switches
Uninterruptible power systems
Electric power systems
3 引用 (Scopus)

SMALL UPS USING PHASE CONTROL.

Harada, K., Sakamoto, H. & Shoyama, M., 12 1 1987, INTELEC, International Telecommunications Energy Conference (Proceedings). IEEE, p. 516-520 5 p.

研究成果: 著書/レポートタイプへの貢献会議での発言

Uninterruptible power systems
Phase control
Switching frequency
10 引用 (Scopus)

Spatial distribution of trapped magnetic flux in the high tc superconductor Y1Ba2Cu3O7-δ

Kiss, T., Enpuku, K., Yoshida, K., Takeo, M. & Yamafuji, K., 1 1 1987, : : Japanese Journal of Applied Physics. 26, 8A, p. L1348-L1350

研究成果: ジャーナルへの寄稿記事

Magnetic flux
Spatial distribution
Superconducting materials
magnetic flux
spatial distribution
1 引用 (Scopus)

Transducer Characteristics of a Josephson Line as an Analog Amplifier

Yoshida, K., Hashimoto, T., Enpuku, K. & Yamafuji, K., 1 1 1987, : : Japanese Journal of Applied Physics. 26, S3-2, p. 1581-1582 2 p.

研究成果: ジャーナルへの寄稿記事

Transducers
transducers
amplifiers
analogs
Fluxes
1986
38 引用 (Scopus)

Anomalous magnetic behavior due to reversible fluxoid motion in superconducting multifilamentary wires with very fine filaments

Sumiyoshi, F., Matsuyama, M., Noda, M., Matsushita, T., Funaki, K., Iwakuma, M. & Yamafuji, K., 1 1 1986, : : Japanese Journal of Applied Physics. 25, 2 A, p. L148-L150

研究成果: ジャーナルへの寄稿記事

Superconducting wire
Hysteresis
filaments
wire
critical current

Dynamic characteristics of the push‐pull dc‐dc converter

Shoyama, M. & Harada, K., 1 1 1986, : : Electronics and Communications in Japan (Part II: Electronics). 69, 5, p. 100-109 10 p.

研究成果: ジャーナルへの寄稿記事

Electric instrument transformers
dynamic characteristics
converters
transformers
Transfer functions
3 引用 (Scopus)

Dynamic Characterstics of the Push-Pull DC to DC Converter

Shoyama, M. & Harada, K., 1986, : : IEEE Transactions on Power Electronics. PE-1, 1, p. 3-8 6 p.

研究成果: ジャーナルへの寄稿記事

8 引用 (Scopus)

Effects of tin-diffusion barriers on hysteresis loss and coupling current loss in bronze-processed Nb3Sn multifilamentary composites

Miyahara, K., Sumiyoshi, F., Funaki, K., Iwakuma, M., Kubota, Y., Ogasawara, T. & Yamafuji, K., 1 1 1986, : : Cryogenics. 26, 4, p. 234-241 8 p.

研究成果: ジャーナルへの寄稿記事

Diffusion barriers
Tin
Bronze
bronzes
Hysteresis
converters
transistors
saturation
Feedback
Switching frequency
1 引用 (Scopus)

Monthly load forecasting using GMDH

Sagara, S. & Murata, J., 1 1 1986, : : Electrical Engineering in Japan. 106, 4, p. 125-132 8 p.

研究成果: ジャーナルへの寄稿記事

Mathematical models

Monthly Load Forecasting Using GMDH.

Sagara, S. & Murata, J., 1986, : : IEEJ Transactions on Electronics, Information and Systems. 106, 5, p. 67-74 8 p.

研究成果: ジャーナルへの寄稿記事

63 引用 (Scopus)

Noise characteristics of a dc SQUID with a resistively shunted inductance. II. Optimum damping

Enpuku, K., Yoshida, K. & Kohjiro, S., 12 1 1986, : : Journal of Applied Physics. 60, 12, p. 4218-4223 6 p.

研究成果: ジャーナルへの寄稿記事

inductance
damping
shunts
tradeoffs
transfer functions
10 引用 (Scopus)

On the High-Speed Turn-Off of a Power Transistor By a Small Saturable Core

Harada, K., Sakamoto, H. & Shoyama, M., 1 1 1986, : : IEEE Transactions on Power Electronics. PE-1, 3, p. 175-180 6 p.

研究成果: ジャーナルへの寄稿記事

Switching frequency
Equivalent circuits
Inductance
Deterioration
Capacitance
14 引用 (Scopus)

Resistively shunted dc SQUID coupled to an input coil

Enpuku, K. & Yoshida, K., 12 1 1986, : : Journal of Applied Physics. 59, 5, p. 1714-1719 6 p.

研究成果: ジャーナルへの寄稿記事

coils
impedance
damping
inductance
magnetometers
1985
54 引用 (Scopus)

Effect of damping resistance on voltage versus flux relation of a dc SQUID with large inductance and critical current

Enpuku, K., Sueoka, K., Yoshida, K. & Irie, F., 12 1 1985, : : Journal of Applied Physics. 57, 5, p. 1691-1697 7 p.

研究成果: ジャーナルへの寄稿評論記事

inductance
critical current
damping
electric potential
capacitance
8 引用 (Scopus)

Effects of junction geometry on performance of flux-flow type josephson oscillator

Yoshida, K., Nagatsuma, T., Sueoka, K., Enpuku, K. & Irie, F., 1 1 1985, : : IEEE Transactions on Magnetics. 21, 2, p. 899-902 4 p.

研究成果: ジャーナルへの寄稿記事

Fluxes
Geometry
Linewidth
Radiation
Computer simulation

EFFECTS OF JUNCTION GEOMETRY ON PERFORMANCE OF FLUX-FLOW TYPE JOSEPHSON OSCILLATOR.

Yoshida, K., Nagatsuma, T., Sueoka, K., Enpuku, K. & Irie, F., 1 1 1985, : : IEEE Transactions on Magnetics. MAG-21, 2

研究成果: ジャーナルへの寄稿記事

Fluxes
Geometry
Linewidth
Radiation
Computer simulation
10 引用 (Scopus)

Flux-flow-type josephson linear amplifier with large gain and wide linear range

Nagatsuma, T., Enpuku, K., Iwakura, H. & Yoshida, K., 1 1 1985, : : Japanese Journal of Applied Physics. 24, 8, p. L599-L601

研究成果: ジャーナルへの寄稿記事

linear amplifiers
Equivalent circuits
Amplification
Fluxes
Networks (circuits)
81 引用 (Scopus)

Flux-flow-type Josephson oscillator for millimeter and submillimeter wave region. III. Oscillation stability

Nagatsuma, T., Enpuku, K., Sueoka, K., Yoshida, K. & Irie, F., 12 1 1985, : : Journal of Applied Physics. 58, 1, p. 441-449 9 p.

研究成果: ジャーナルへの寄稿記事

submillimeter waves
millimeter waves
oscillators
oscillations
geometry

IDENTIFICATION OF LOAD CHARACTERISTICS OF POWER SYSTEM USING GMDH.

Sagara, S., Murata, J. & Kishimoto, K., 1985, IFAC Proceedings Series. 7 版 Pergamon Press, p. 303-308 6 p.

研究成果: 著書/レポートタイプへの貢献会議での発言

System stability
35 引用 (Scopus)

Noise characteristics of a dc SQUID with a resistively shunted inductance

Enpuku, K., Muta, T., Yoshida, K. & Irie, F., 12 1 1985, : : Journal of Applied Physics. 58, 5, p. 1916-1923 8 p.

研究成果: ジャーナルへの寄稿記事

inductance
damping
critical current
degradation
simulation

On the turn-off of GTO by a small saturable core

Harada, K., Sakamoto, H. & Shoyama, M., 1 1 1985, : : IEEJ Transactions on Electronics, Information and Systems. 105, 11, p. 219-226 8 p.

研究成果: ジャーナルへの寄稿記事

OUTPUT VOLTAGE RIPPLE IN THE PUSH-PULL DC-TO-DC CONVERTER.

Shoyama, M. & Harada, K., 12 1 1985, INTELEC, International Telecommunications Energy Conference (Proceedings). VDE Verlag GmbH, p. 323-330 8 p. (INTELEC, International Telecommunications Energy Conference (Proceedings)).

研究成果: 著書/レポートタイプへの貢献会議での発言

Inductance
Electric potential
1 引用 (Scopus)

PROPERTIES OF POWDER METALLURGY PROCESSED Nb//3Sn SUPERCONDUCTING WIRES.

Yamafuji, K., Iwakuma, M., Sumiyoshi, F., Ogawa, R., Miyatake, T. & Matsumoto, K., 12 1 1985, Unknown Host Publication Title. Swiss Inst for Nuclear Research, p. 468-471 4 p.

研究成果: 著書/レポートタイプへの貢献会議での発言

Powder metallurgy
Wire
Bronze
Fabrication
Costs
1984
1 引用 (Scopus)

A practical in situ wire: a composite wire with many in situ processed Nb3Sn cores of an internal diffusion type

Yamafuji, K., Sumiyoshi, F., Akenaga, Y., Iwakuma, M., Onodera, R. & Mori, N., 1 1 1984, : : Cryogenics. 24, 4, p. 191-199 9 p.

研究成果: ジャーナルへの寄稿記事

Cable cores
wire
Wire
composite materials
Composite materials

ESTIMATION OF THE CRITICAL-CURRENT DENSITY DISTRIBUTION IN JOSEPHSON TUNNEL JUNCTIONS.

Yoshida, K., Uchida, N., Enpuku, K., Tanaka, T. & Irie, F., 12 1 1984, Unknown Host Publication Title. pt 1 版 North-Holland, p. 471-472 2 p.

研究成果: 著書/レポートタイプへの貢献会議での発言

Tunnel junctions
Critical currents
Spatial distribution
Current density
91 引用 (Scopus)

Flux-flow-type Josephson oscillator for millimeter and submillimeter wave region. II. Modeling

Nagatsuma, T., Enpuku, K., Yoshida, K. & Irie, F., 12 1 1984, : : Journal of Applied Physics. 56, 11, p. 3284-3293 10 p.

研究成果: ジャーナルへの寄稿記事

submillimeter waves
millimeter waves
oscillators
output
electric potential

Flux-Trapping Characteristics of Pb-alloy Superconducting Thin Films for Josephson Tunnel Junctions

Uchida, N., Enpuku, K., Yoshida, K. & Irie, F., 1 1 1984, : : Shinku. 27, 8, p. 667-677 11 p.

研究成果: ジャーナルへの寄稿記事

Flux pinning
Superconducting films
Tunnel junctions
tunnel junctions
trapping

Identification of load characteristics of power systems using GMDH

Sagara, S., Murata, J. & Kishimoto, K., 1 1 1984, : : Electrical Engineering in Japan. 104, 3, p. 134-143 10 p.

研究成果: ジャーナルへの寄稿記事

Identification of Load Characteristics of Power Systems Using GMDH

Sagara, S., Murata, J. & Kishimoto, K., 1 1 1984, : : The transactions of the Institute of Electrical Engineers of Japan.C. 104, 7, p. 173-180 8 p.

研究成果: ジャーナルへの寄稿記事