Faculty Profiles - OGAWA Jun

MISC - OGAWA Jun

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Measurement of Total Losses in HTS wire by Electrical and Calorimetric Method

YANAGIHARA Yasuhiro, OGAWA Jun, YAMATO Yasunari, TSUKAMOTO Osami

68 197 - 197 2003.5

Influence of AC external magnetic field perturbation on trapped magnetic field in HTS bulk

J Ogawa, M Iwamoto, K Yamagishi, O Tsukamoto, M Murakami, M Tomita

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 386 26 - 30 2003.4

Language：English Publisher：ELSEVIER SCIENCE BV

Electric motors and actuators are most promising future applications of HTS bulks. The HTS bulks in these electric machines are exposed to AC magnetic field perturbations. The perturbations cause AC losses in the bulks and also affect the magnetic field trapped in the bulks. In a previous work we measured AC losses in a YBCO bulk subject to the AC magnetic field and. found the loss characteristics well followed the Bean model. In this work we experimentally studied the influence of the AC perturbations of the external magnetic field on the trapped field in a YBCO bulk. The experimental results showed that the application of the AC magnetic field decreased the trapped magnetic field even to zero. In this paper, the experimental results are presented and a reason for the decay of the trapped magnetic field is discussed based on the Bean model. (C) 2002 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0921-4534(02)02114-7

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The Temperature Rise of Superconductor Bulk Due to AC External Magnetic Field

YAMAGISHI Kazuhito, OGAWA Jun, TSUKAMOTO Osami, MURAKAMI Masato, TOMITA Yu

67 241 - 241 2002.10

AC transport current losses in YBCO tape subject to AC external field parallel to tape surface

OGAWA Jun, SHIOKAWA Masashi, TSUKAMOTO Osami

67 198 - 198 2002.10

AC loss measurement of HTS wire subject to AC longitudinal magnetic field

OGAWA Jun, SHIOKAWA Masashi, TSUKAMOTO Osami, AYAI Naoki, HAYASHI Kazuhiko

65 95 - 95 2001.11

Magnetization of HTS bulk-array with alternate polarities

IWAMOTO Masao, IZUHARA Hideshi, OGAWA Jun, TSUKAMOTO Osami, MURAKAMI Masato

62 130 - 130 2000.5

Magnetization loss of YBCO bulk superconductor

IWAMOTO Masao, IZUHARA Hideshi, OGAWA Jun, TSUKAMOTO Osami, MURAKAMI Masato

62 178 - 178 2000.5

AC loss characteristics of YBCO tape

TSUKAMOTO O., CISZEK M., OGAWA J., KASUU O., II H., TAKEDA K., SHIBUYA M.

2000 ( 1 ) 13 - 17 2000.1

AC transport current loss of YBCO superconducting tape on DC external magnetic field

MIYAGI Daisuke, OGAWA Jun, TSUKAMOTO Osami, KASUU Osamu, II Hideki, TAKEDA Kaoru, SHIBUYA Masatoyo

1999 ( 36 ) 1 - 5 1999.7

Total Loss in Bi-2223/Ag Superconducting Multifilamentary Sheathed Tapes

OGAWA Jun, CISZEK Marian, TSUKAMOTO Osami, HAYASHI Kazuhiko, UYEYAMA Munetsugu

1999 ( 36 ) 19 - 23 1999.7

Loss and magnetization characteristics of YBCO bulk in AC magnetic field

IWAMOTO Masao, IZUHARA Hideshi, OGAWA Jun, TSUKAMOTO Osami, MURAKAMI Masato

2000 ( 39 ) 91 - 94 1999.6

Magnetization of bulk array with alternate polarities for superconducting linear actuator

IWAMOTO Masao, IZUHARA Hideshi, OGAWA Jun, TSUKAMOTO Osami, MURAKAMI Masato

2000 ( 39 ) 101 - 104 1999.6

AC Transport Current Loss of YBCO Superconductiong Tape in External DC Magnetic Field

MIYAGI Daisuke, OGAWA Jun, TSUKAMOTO Osami, KASUU Osamu, II Hideki, TAKEDA Kaoru, SHIBUYA Masatoyo

60 240 - 240 1999.6

AC Transport Current Loss of High-Temperature Superconducting Film Prepared on Single-Crystal Substrate

MIYAGI Daisuke, OGAWA Jun, TSUKAMOTO Osami, KUDO Yuki, KUBOTA Hiroshi, YAMAZAKI Mutsuki, YOSHINO Hisashi

60 146 - 146 1999.6

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