Kyushu University Academic Staff Educational and Research Activities Database
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Kazuhiro Kajikawa Last modified date:2018.06.12

Associate Professor / Superconductive Systems Engineering Laboratory
Department of Electrical Engineering
Faculty of Information Science and Electrical Engineering


Graduate School
Undergraduate School
Other Organization


Homepage
http://www.sc.kyushu-u.ac.jp/~kajikawa/
Academic Degree
Doctor of Engineering
Field of Specialization
Superconducting Engineering
Research
Research Interests
  • Research and development of cryogenic liquid circulation pumps for HTS power devices
    keyword : High temperature superconductor, Circulation pump, Magnetic bearing, Superconducting motor, Maintenance free, Energy saving, Power transmission cable, Liquid nitrogen
    2016.11.
  • AC loss evaluation of high temperature superconducting DC magnets
    keyword : High temperature superconductor, Tape-shaped wire, Superconducting magnet, Energization and discharge, AC loss, Numerical analysis, Magnetic interaction between turns, Influence of transport current
    2013.08~2016.03.
  • Development of HTS magnets with high uniformity of magnetic field in their central parts
    keyword : High temperature superconductor, Tape-shaped wire, Magnetic resonance imaging (MRI), Nuclear magnetic resonance (NMR), Superconducting magnet, Central magnetic field, High uniformity, Experiment, Numerical analysis
    2011.02.
  • AC loss evaluation of coil for SMES with Y-based superconducting wire
    keyword : Y-based coated conductor, Superconducting magnetic energy storage system, Pancake coil, Toroidal arrangement, Load fluctuation compensation, Power system stabilization, Hysteresis loss, Magnetic interaction between turns, Numerical analysis, Theoretical e
    2007.10~2010.11.
  • Research and Development of an MgB2 Superconducting Pump to Circulate and Transfer Liquid Hydrogen
    keyword : MgB2 superconductor, liquid hydrogen, circulation/transfer pump, fully superconducting induction/synchronous motor, low loss, high efficiency, small size, light weight
    2007.07~2014.03.
  • Development of high gradient magnetic separation system with superconducting magnet
    keyword : NbTi multifilamentary wire, superconducting magnet, cryocooler, conduction cooling, design, fabrication, experiment, serum, immunoglobulin, monoclonal antibody, high gradient magnetic separation
    2007.04~2015.03.
  • Research and Development of Superconducting Level Sensors for Liquid Hydrogen with MgB2 Wires
    keyword : MgB2 superconductor, liquid hydrogen, liquid level sensing, superconducting level sensor, experiment, thermal stability, finite difference method, thermal analysis
    2006.03.
  • Evaluation of thermal stability in MgB2 wires
    keyword : MgB2 superconductor, Normal zone propagation, experiment, Immersion cooling, Conduction cooling, Finite difference method, Finite element method, Heat-transfer analysis
    2004.06~2010.01.
  • Analysis of electromagnetic fields in superconductor strips
    keyword : Theoretical analysis, Conformal mapping, Numerical analysis, Finite element method, Distribution of electromagnetic fields, AC loss, Transport current, External magnetic field, Their simultaneous applications
    2002.09~2010.11.
Academic Activities
Papers
1. K.Kajikawa, K.Funaki, K.Shikimachi, N.Hirano and S.Nagaya, Numerical evaluation of AC loss properties in assembled superconductor strips exposed to perpendicular magnetic field, Physica C, Vol.469, Nos.15-20, pp.1436-1438, 2009.10.
2. K.Kajikawa and T.Nakamura, Proposal of a Fully Superconducting Motor for Liquid Hydrogen Pump With MgB2 Wire, IEEE Transactions on Applied Superconductivity, Vol.19, No.3, pp.1669-1673, 2009.06.
3. K.Kajikawa, K.Tomachi, K.Tanaka, K.Funaki, T.Kamiya, M.Okada and H.Kumakura, Numerical simulation of a superconducting level sensor for liquid hydrogen with MgB2 wire, 22nd International Cryogenic Engineering Conference and International Cryogenic Materials Conference 2008, pp.425-430, 2009.05.
4. K.Kajikawa, R.Yokoo, K.Tomachi, K.Enpuku, K.Funaki, H.Hayashi and H.Fujishiro, Finite element analysis of pulsed field magnetization process in a cylindrical bulk superconductor, Physica C, Vol.468, Nos.15-20, pp.1494-1497, 2008.09.
5. K.Kajikawa, R.Yokoo, K.Tomachi, K.Enpuku, K.Funaki, H.Hayashi and H.Fujishiro, Numerical Evaluation of Pulsed Field Magnetization in a Bulk Superconductor Using Energy Minimization Technique, IEEE Transactions on Applied Superconductivity, Vol.18, No.2, pp.1557-1560, 2008.06.
6. K.Kajikawa, K.Tomachi, N.Maema, M.Matsuo, S.Sato, K.Funaki, H.Kumakura, K.Tanaka, M.Okada, K.Nakamichi, Y.Kihara, T.Kamiya and I.Aoki, Fundamental investigation of a superconducting level sensor for liquid hydrogen with MgB2 wire, Journal of Physics: Conference Series, Vol.97, 012140, 2008.03.
7. K.Kajikawa, Y.Iiyama, K.Enpuku and K.Funaki, Current sharing among filaments for Bi-2223 Ag-sheathed tapes with inter-filament barrier, Physica C, Vols.463-465, pp.852-856, 2007.10.
8. K.Kajikawa, D.Nakamura, T.Hayashi and K.Funaki, Numerical Evaluation of AC Loss Property in Bi-2223 Tapes Affected by Multifilament Structure, IEEE Transactions on Applied Superconductivity, Vol.17, No.2, pp.2410-2413, 2007.06.
9. K.Kajikawa, Y.Mawatari, Y.Iiyama, T.Hayashi, K.Enpuku, K.Funaki, M.Furuse and S.Fuchino, Feasibility study on a new three-phase power transmission cable with radial arrangement of superconducting tapes, Physica C, Vols.445-448, pp.1058-1061, 2006.10.
10. T.Hayashi, D.Nakamura, K.Kajikawa, M.Iwakuma and K.Funaki, Numerical Evaluation of Total AC Loss in Parallel Tape Conductor With Transport Current in Oblique Magnetic Field, IEEE Transactions on Applied Superconductivity, Vol.16, No.2, pp.97-100, 2006.06.
11. K.Kajikawa, Y.Takahashi, K.Enpuku, K.Funaki, H.Hayashi, M.Morita and H.Hirano, Finite Element Analysis of Thermal and Mechanical Behaviors in Fault Current Limiter Model With QMG Bulk Superconductors, IEEE Transactions on Applied Superconductivity, Vol.16, No.2, pp.666-669, 2006.06.
12. K.Kajikawa, T.Hayashi, D.Nakamura and K.Funaki, Magnetization loss properties of thin superconducting tapes with field-dependent critical current, Physica C, 10.1016/j.physc.2005.02.106, 426, 1295-1301, Vols.426-431, Part 2, pp.1295-1301, 2005.10.
13. T.Hayashi, K.Kajikawa, M.Iwakuma and K.Funaki, Numerical calculations of AC losses in parallel tape conductors with fixed share of transport current in external magnetic field, Physica C, 10.1016/j.physc.2005.03.053, 426, 1328-1332, Vols.426-431, Part 2, pp.1328-1332, 2005.10.
14. K.Kajikawa, T.Hayashi and K.Funaki, Numerical Evaluation of Anisotropy of Magnetization Losses in Superconducting Wires With Elliptic Cross Section, IEEE Transactions on Applied Superconductivity, 10.1109/TASC.2005.849174, 15, 2, 1570-1573, Vol.15, No.2, pp.1570-1573, 2005.06.
15. T.Hayashi, K.Kajikawa, M.Iwakuma and K.Funaki, Numerical Calculation of Ac Losses in Stacked Bi-2223 Tapes Exposed to Oblique Magnetic Field, IEEE Transactions on Applied Superconductivity, 10.1109/TASC.2005.848249, 15, 2, 2863-2866, Vol.15, No.2, pp.2863-2866, 2005.06.
16. K.Kajikawa, Y.Mawatari, T.Hayashi and K.Funaki, AC loss properties in thin superconducting wires with cross sections of various shapes, Institute of Physics Conference Series 181, pp.2021-2028, 2004.12.
17. K.Kajikawa, T.Hayashi, K.Funaki, E.S.Otabe and T.Matsushita, Dependence of AC losses on aspect ratio in superconducting wires with rectangular cross section, Physica C, 10.1016/j.physc.2004.01.127, 412, 1045-1049, Vols.412-414, Part 2, pp.1045-1049, 2004.10.
18. T.Hayashi, R.Yoshida, Y.Fukuda, K.Kajikawa, M.Iwakuma and K.Funaki, Numerical calculation of magnetization losses in single Bi-2223 tape with anisotropic transport properties by 2D-FEM directly analyzing the field distribution, Physica C, 10.1016/j.physc.2004.01.135, 412, 1129-1133, Vols.412-414, Part 2, pp.1129-1133, 2004.10.
19. K.Kajikawa, T.Hayashi and K.Funaki: "AC Loss Properties of Elliptic Superconducting Wires Exposed to a Transverse Magnetic Field with an Arbitrary Angle," Journal of Cryogenic Society of Japan.
20. K.Kajikawa, K.Funaki, H.Hayashi, K.Terazono, M.Morita, H.Hirano and T.Hamajima, Numerical Study on Fundamental Properties of a Resistive Type Fault Current Limiter With QMG Bulk Superconductor Reinforced by Metal Bypass, IEEE Transactions on Applied Superconductivity, 10.1109/TASC.2004.830296, 14, 2, 847-850, Vol.14, No.2, pp.847-850, 2004.06.
21. K.Kajikawa, Y.Mawatari, T.Hayashi and K.Funaki, AC loss evaluation of thin superconducting wires with critical current distribution along width, Superconductor Science and Technology, 10.1088/0953-2048/17/3/042, 17, 3, 555-563, Vol.17, No.3, pp.555-563, 2004.03.
22. M.Iwakuma, Y.Fukuda, M.Fukui, K.Kajikawa and K.Funaki, Magnetic field angular dependence of AC losses in Bi-2223 superconducting wires, Physica C, 10.1016/S0921-4534(03)01118-3, 392, 1096-1101, Vols.392-396, Part 2, pp.1096-1101, 2003.10.
23. K.Kajikawa, T.Hayashi, R.Yoshida, M.Iwakuma and K.Funaki, Influence of vacuum region on AC losses in superconducting wires with 2D FEM formulated by self-magnetic field, Physica C, 10.1016/S0921-4534(03)01116-X, 392, 1113-1117, Vols.392-396, Part 2, pp.1113-1117, 2003.10.
24. Y.Fukuda, K.Toyota, K.Kajikawa, M.Iwakuma and K.Funaki, Field Angle Dependence of Ac Losses in Stacked Bi-2223 Ag-Sheathed Tapes, IEEE Transactions on Applied Superconductivity, 10.1109/TASC.2003.812410, 13, 2, 3610-3613, Vol.13, No.2, pp.3610-3613, 2003.06.
25. K.Kajikawa, T.Hayashi, R.Yoshida, M.Iwakuma and K.Funaki, Numerical Evaluation of AC Losses in HTS Wires With 2D FEM Formulated by Self Magnetic Field, IEEE Transactions on Applied Superconductivity, 10.1109/TASC.2003.812415, 13, 2, 3630-3633, Vol.13, No.2, pp.3630-3633, 2003.06.
26. K.Kajikawa, Y.Fukuda, H.Moriyama, T.Hayashi, M.Iwakuma and K.Funaki, Frequency dependence of AC magnetization in stacked Bi-2223 Ag-sheathed tapes, Physica C, 10.1016/S0921-4534(02)01210-8, 382, 1, 122-126, Vol.382, No.1, pp.122-126, 2002.10.
27. K.Kajikawa, M.Iwakuma and K.Funaki, A heuristic description of AC losses in superconducting slab with smooth voltage-current characteristics represented by power law, Physica C, 10.1016/S0921-4534(02)01593-9, 378, 1097-1101, Vols.378-381, Part 2, pp.1097-1101, 2002.10.
28. K.Kajikawa, M.Nishimura, H.Moriyama, M.Iwakuma and K.Funaki, Theoretical evaluation of perpendicular-field losses in stacked high-Tc superconducting tapes, Physica C, 10.1016/S0921-4534(02)01722-7, 378, 1122-1127, Vols.378-381, Part 2, pp.1122-1127, 2002.10.
29. K.Kajikawa, Y.Fukuda, H.Moriyama, T.Hayashi, M.Iwakuma and K.Funaki, AC Magnetization and Losses of Stacked HTS Tapes in External Magnetic Field Perpendicular to Their Wide Faces, International Workshop on Informations & Electrical Engineering 2002, pp.135-140, 2002.05.
30. K.Kajikawa, M.Nishimura, H.Moriyama, M.Iwakuma and K.Funaki: "Quantitative Evaluation of Perpendicular-field Losses in Stacked Oxide Superconducting Tape-shaped Wires," Transactions of Institute of Electrical Engineers of Japan.
31. K.Kajikawa, M.Nishimura, H.Moriyama, M.Iwakuma and K.Funaki, A new experimental technique to evaluate perpendicular-field losses of superconducting tape wires with meter-class length, Physica C, 10.1016/S0921-4534(01)00485-3, 357, 1201-1204, Vols.357-360, Part 2, pp.1201-1204, 2001.08.
32. K.Kawasaki, K.Kajikawa, M.Iwakuma and K.Funaki, Theoretical expressions for AC losses of superconducting coils in external magnetic field and transport current with phase difference, Physica C, 10.1016/S0921-4534(01)00486-5, 357, 1205-1208, Vols.357-360, Part 2, pp.1205-1208, 2001.08.
33. K.Kajikawa, A.Takenaka, K.Kawasaki, M.Iwakuma and K.Funaki, Numerical Simulation for AC Losses of HTS Tapes in Combined Alternating Transport Current and External AC Magnetic Field with Phase Shift, IEEE Transactions on Applied Superconductivity, 10.1109/77.920305, 11, 1, 2240-2243, Vol.11, No.1, pp.2240-2243, 2001.03.
34. K.Kajikawa, A.Takenaka, K.Kawasaki, M.Iwakuma and K.Funaki, AC Losses of HTS Tapes in Parallel Magnetic Field and Transport Current with Phase Shift, International Workshop on Critical Currents and Applications of HTS, pp.55-56, 2000.10.
35. K.Kajikawa, H.Shiraishi, A.Takenaka, M.Iwakuma and K.Funaki, Applicability of a "simple electromagnetic method" to AC loss measurements in more general electromagnetic configurations, Advances in Cryogenic Engineering (Materials), Vol.46, Part B, pp.1035-1042, 2000.08.
36. K.Kajikawa, A.Takenaka, M.Iwakuma and K.Funaki, Influences of collective interaction of turns on transverse-field losses in superconducting multifilamentary wires, Institute of Physics Conference Series 167, Vol.1, pp.931-934, 2000.06.
37. K.Kajikawa, H.Shiraishi, A.Takenaka, M.Iwakuma and K.Funaki, Influences of winding pitch on transverse-field loss of multifilamentary wire measured by a simple electromagnetic method with configuration of a double-layer non-inductive sample coil, Cryogenics, 10.1016/S0011-2275(99)00091-0, 39, 10, 871-885, Vol.39, No.10, pp.871-885, 1999.10.
38. K.Kajikawa, M.Iwakuma, K.Funaki, M.Wada and A.Takenaka, Influences of Geometrical Configuration on AC Loss Measurement with Pickup-Coil Method, IEEE Transactions on Applied Superconductivity, 10.1109/77.783402, 9, 2, 746-749, Vol.9, No.2, pp.746-749, 1999.06.
39. K.Kajikawa, H.Shiraishi, A.Takenaka, M.Iwakuma and K.Funaki, Effects of Winding Pitch on Transverse-Field Losses Measured by a Simple Electromagnetic Method, Advances in Superconductivity XI, Vol.2, pp.967-970, 1999.06.
40. K.Funaki, K.Kajikawa, H.Shiraishi, M.Iwakuma, S.Miyake, T.Kumano and T.Hasegawa, A simple electromagnetic method of cyclic loss measurement for superconducting wires in a combined alternating transverse magnetic field and transport current, Physica C, 10.1016/S0921-4534(98)00448-1, 310, 1-4, 132-136, Vol.310, Nos.1-4, pp.132-136, 1998.12.
41. K.Kajikawa, M.Iwakuma, K.Funaki, M.Nakamura, H.Shiraishi, D.Sakamoto, T.Matsushita, Y.Hikichi, T.Hasegawa and T.Kumano, Various Types of AC Losses in Ag-Sheathed Bi-2223 Tapes Measured by a Universal Method with a Double-Layer Non-Inductive Sample Coil, 15th International Conference on Magnet Technology, Part 2, pp.1128-1131, 1998.10.
42. K.Kajikawa, M.Nakamura, M.Iwakuma and K.Funaki, Theoretical Evaluation of Geometrical Errors in AC Loss Measurements Using Pickup-coil Methods, Advances in Superconductivity X, Vol.2, pp.1413-1416, 1998.06.
43. K.Funaki, K.Kajikawa, H.Tomiya, M.Nakamura, M.Iwakuma, S.Miyake and T.Kumano, A Simple Method for Measurement of AC Losses in Superconducting Wires under Configuration of a Double-Layer Non-Inductive Coil, Advances in Cryogenic Engineering, 43, 341-348, Vol.43, Part A, pp.341-348, 1998.04.
Membership in Academic Society
  • Institute of Electrical Engineers of Japan
  • Cryogenics and Superconductivity Society of Japan
  • Japan Society of Applied Physics
  • Institute of Electrical and Electronics Engineers (IEEE)
Educational
Educational Activities
I have an educational lecture of the "Mathematics for Electrical Engineering and Computer Science" for the first-grade bachelor course students in the Department of Electrical Engineering and Computer Science (EECS). I have also supervised the themes of bachelor theses for the fourth-grade bachelor course students in the Department of EECS.

With respect to the graduate school, on the other hand, I have an educational lecture of the "Superconductor Characterization Engineering" for the master course students in the Graduate School of Information Science and Electrical Engineering (ISEE). I have also supervised the themes of master theses for the master course students assigned to the Division of Fundamental Superconductivity in the Department of Electrical and Electronic Systems Engineering.
Social
Professional and Outreach Activities
The book entitled "Vector Analysis and Fourier Analysis" written by ourselves was published from the Asakura Publishing Co., Ltd. in November, 2007. This book simply and clearly explains both the vector analysis and the Fourier analysis, which correspond to two of the basic mathematical subjects for the electrical engineering, on the basis of my activities for education and research over the past years, and therefore I have contributed the society broadly.

I also served as one of the lecturers for the "2004 Korea-Japan Joint Workshop on Superconducting Magnet and Cryogenics" held at Korea Basic Science Institute, Daejeon, Korea, from August 16 (Mon.) to 21 (Sat.), 2004. We supervised the design and fabrication techniques for seven-tesla class superconducting magnets with NbTi wires, and therefore I contributed the educational activity for professionals internationally..