論 文

代表的な論文をいくつか以下に示します.

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  1. J. Asama and A. Chiba, “Performance Evaluation of a Homopolar Bearingless Motor for Ultra-High-Speed Applications,” IEEE Transactions on Industry Applications (accepted).
    10.1109/TIA.2021.3089556
    概要:本論文で提案するホモポーラ形ベアリングレスモータは,固定子を2ユニット使用しその間に永久磁石を挟み込む,永久磁石バイアス形です.回転子は,鉄心のみで構成されるため,堅牢な構造で,高速回転向きです.固定子には,浮上用・回転用の2種類の三相巻線が施されています.6極の回転子で10万rpmでの非接触磁気浮上回転に成功しています.
  2. J. Asama, Y. Kamiya, and A. Chiba, “Asymmetrical Four-Phase Combined Winding Arrangement for Bearingless PM Motors,” IEEE Transactions on Industry Applications (accepted).
    10.1109/TIA.2021.3089447
    概要:三相ブラシレスDCモータを,四相ベアリングレスモータにコンバートする汎用的な手法を提案している.論文では,12スロット10極の表面磁石形ブラシレスDCモータを,四相非対称巻線構造によって,三相巻線と同等のトルクかつ,半径方向の支持力を発生させ,ベアリングレス駆動を実現しています.どのようにして,四相を選択するかがキーとなりますが,その選択方法も詳細に説明しています.
  3. Y. Fujii, J. Asama, and A. Chiba, “Voltage Sensorless Control of Split Capacitor for Three-Phase Four-Wire Motor System with Zero-Sequence Suspension Winding,” IEEE Transactions on Industry Applications (accepted).
    10.1109/TIA.2021.3088767
    概要:三相インバータ1台で三相四線式モータの零相電流を制御するためには,分割コンデンサを用いる必要があるが,電流センサのオフセット誤差のため必ず電圧が不平衡になる.このため,電圧センサを使ってモセンシングする必要があるが,本論文では,電圧センサレスで平滑化する方法を提案している.
  4. J. Asama and A. Chiba, “Three-Coil Combined Winding Configuration for a Two-DOF Actively Controlled Bearingless Permanent Magnet Motor,” IEEE Transactions on Industry Applications (accepted).
    概要:本論文では,3コイルのみで2自由度制御形ベアリングレスモータのラジアル方向の磁気浮上と回転を可能にする新しい構造を提案している.三相四線式(スター結線)6スロット6極構造で,三相で2自由度の磁気浮上制御,零相電流で単相モータ駆動を実現している.
    10.1109/TIA.2021.3078665
  5. 朝間淳一, 生田愛育, 野口季彦, 藤原照彦, “サマリウムコバルト磁石を用いた埋込磁石同期モータの高温動作特性”,電気学会論文誌D(産業応用部門誌),Vol. 141, No. 2, pp. 199-205, 2021.
    概要:サマリウムコバルト磁石(LM-34SH)とネオジム磁石(N40-UH)を使ったIPMモータを2台製作し,モータを200℃に加熱して負荷試験を行った.その結果,サマコバ磁石を用いたIPMモータの方が,ネオジム磁石と比較して,100℃以上でトルクが大きく,200℃では高効率範囲が広いことを実証した.
    10.1541/ieejias.141.199
  6. 藤井勇介, 朝間淳一, 千葉明, 藤田英明, “三相四線式モータ駆動システムにおけるダイオード整流を用いた零相負荷の直流電流制御”, 日本機械学会論文集, Vol. 86, No. 890,  19-00403, 2020.
    10.1299/transjsme.19-00403
  7. 森洸太郎, 朝間淳一, 大岩孝彰, 鳥居孝夫, “2 自由度制御形磁気浮上モータにおける d 軸電流を用いた共振回避法”, 日本機械学会論文集, Vol. 85, No. 872,  18-00417, 2019.
    10.1299/transjsme.18-00417
  8. 藤井勇介, 朝間淳一, 大岩孝彰, 千葉明, “永久磁石モータの零相電流を用いた磁気浮上システムにおける浮上位置決め精度の改善”, 電気学会論文誌D(産業応用部門誌), Vol. 139, No. 3, pp. 322-329, 2019.
    10.1541/ieejias.139.322
  9. J. Asama, T. Oi, T. Oiwa, and A. Chiba, “Simple Driving Method for a Two-DOF Controlled Bearingless Motor Using One Three-Phase Inverter”, IEEE Transactions on Industry Applications, Vol. 54, No. 5, pp. 4365 – 4376, 2018.
    10.1109/TIA.2018.2845405
  10. J. Asama, T. Oiwa, T. Shinshi, and A. Chiba, “Experimental Evaluation for Core Loss Reduction of a Consequent-Pole Bearingless Disk Motor Using Soft Magnetic Composites”, IEEE Transactions on Energy Conversion, Vol. 33, Issue 1, pp. 324-332, 2018.
    10.1109/TEC.2017.2738674
  11. J. Asama, Y. Fujii, T. Oiwa, and A. Chiba, “Novel Control Method for Magnetic Suspension and Motor Drive with One Three-Phase Voltage Source Inverter Using Zero-Phase Current”, Mechanical Engineering Journal (日本機械学会英文誌), Vol. 2, No. 4, paper No. 15-00116, 2015.
    http://doi.org/10.1299/mej.15-00116
  12. J. Asama, D. Kanehara, T. Oiwa, and A. Chiba, “Development of a Compact Centrifugal Pump with a Two-Axis Actively Positioned Consequent-Pole Bearingless Motor”, IEEE Transactions on Industry Applications, Vol. 50, No. 1, pp. 288-295, 2014.
    10.1109/TIA.2013.2270452
  13. J. Asama, D. Kanehara, T. Oiwa, and A. Chiba, “Suspension Performance of a Two-Axis Actively Regulated Consequent-Pole Bearingless Motor”, IEEE Transactions on Energy Conversion, Vol. 28, No. 4, pp. 894 – 901, 2013.
    10.1109/TEC.2013.2283724
  14. J. Asama, Y. Hamasaki, T. Oiwa, and A. Chiba, “Proposal and Analysis of a Novel Single-drive Bearingless Motor”, IEEE Transactions on Industrial Electronics, Vol. 60, No. 1, pp. 129-138, 2013.
    10.1109/TIE.2012.2183840
  15. J. Asama, R. Natsume, H. Fukuhara, T. Oiwa, and A. Chiba, “Optimal Suspension Winding Configuration in a Homo-polar Bearingless Motor”, IEEE Transactions on Magnetics, Vol. 48, Issue 11, pp. 2973-2976 , 2012.
    10.1109/TMAG.2012.2196501
  16. J. Asama, R. Kawata, T. Tamura, T. Oiwa, and A. Chiba, “Reduction of Force Interference and Performance Improvement of a Consequent-Pole Bearingless Motor”, Precision Engineering (精密工学会,米国精密工学会,欧州精密工学会の共同英文誌), Vol. 36, Issue 1, pp. 10-18, January 2012.
    http://dx.doi.org/10.1016/j.precisioneng.2011.05.002
  17. J. Asama, R. Nakamura, H. Sugimoto, and A. Chiba, “Evaluation of Magnetic Suspension Performance in a Multi-Consequent-Pole Bearingless Motor”, IEEE Transactions on Magnetics, Vol. 47, No. 10, pp. 4262 – 4265, October 2011.
    10.1109/TMAG.2011.2158076
  18. J. Asama, T. Asami, T. Imakawa, A. Chiba, A. Nakajima, and M. A. Rahman, “Effects of Permanent-Magnet Passive-Magnetic-Bearing on a 2-axis Actively Regulated Low-Speed Bearingless Motor”, IEEE Transactions on Energy Conversion, Vol. 26, No. 1, pp. 46-54, March 2011.
    10.1109/TEC.2010.2073709
  19. J. Asama, M. Amada, N. Tanabe, N. Miyamoto, A. Chiba, S. Iwasaki, M. Takemoto, T. Fukao, and M. A. Rahman, “Evaluation of a Bearingless PM Motor with Wide Magnetic Gaps”, IEEE Transactions on Energy Conversion, Vol. 25, No. 4, pp. 957-964, December 2010.
    10.1109/TEC.2010.2040828
  20. Y. Asano, A. Mizuguchi, M. Amada, J. Asama, A. Chiba, M. Ooshima, M. Takemoto, T. Fukao, O. Ichikawa, and D. G. Dorrell, “Development of a 4-axis Actively Controlled Consequent-Pole Type Bearingless Motor” IEEE Transactions on Industry Applications, Vol. 45, Issue 4, pp. 1378-1386, July/August 2009.
    10.1109/TIA.2009.2023498
  21. M. Amada, N. Miyamoto, T. Enomoto, N. Tanabe, J. Asama, A. Chiba, T. Fukao, S. Iwasaki, M. Takemoto, “A Case Study of Suspension Characteristics of a Bearingless Motor Supplied by Inverters Having Different Voltage and Current Ratings”, Journal of System Design and Dynamics (日本機械学会英文誌), Vol. 3, No. 4, pp. 506-518, 2009.
    https://doi.org/10.1299/jsdd.3.506
  22. J. Asama, M. Amada, A. Chiba, M. Takemoto, T. Fukao, and M. A. Rahman, “Voltage Characteristics of a Consequent-pole Bearingless PM Motor with Concentrated Windings”, IEEE Transactions on Magnetics, Vol. 45, Issue 6, pp. 2823-2826, June 2009.
    10.1109/TMAG.2009.2018679
  23. H. Sugimoto, K. Kamiya, R. Nakamura, J. Asama, A. Chiba, T. Fukao, and D. G. Dorrell, “Design and Basic Characteristics of Multi-Consequent-pole Bearingless Motor with bi-tooth Main Poles”, IEEE Transactions on Magnetics, Vol. 45, Issue 6, pp. 2795-2798, June 2009.
    10.1109/TMAG.2009.2018652
  24. N. Miyamoto, T. Enomoto, J. Asama, A. Chiba, T. Fukao, S. Iwasaki, and M. Takemoto, “Suspension Characteristics of a Wide Gap Bearingless Motor with Cylindrical Rotor”, IEEE Transactions on Magnetics, Vol. 45, Issue 6, pp. 2791-2794, June 2009.
    10.1109/PES.2008.4596484
  25. T. Yamada, Y. Nakano, J. Asama, A. Chiba, T. Fukao, T. Hoshino, and A. Nakajima, “Outer Rotor Consequent-pole Bearingless Motor with Improved Start-up Characteristics”, IEEE Transactions on Magnetics, Vol. 44, No. 11, Part 2, 2008, pp. 4273 – 4276.
    10.1109/TMAG.2008.2001845
  26. J. Asama, T. Shinshi, H. Hoshi, S. Takatani, and A. Shimokohbe, “Dynamic Characteristics of a Magnetically Levitated Impeller in a Centrifugal Blood Pump”, Artificial Organs, Vol. 31, No. 4, 2007, pp.301-311.
    http://dx.doi.org/10.1111/j.1525-1594.2007.00378.x
  27. H. Hoshi, J. Asama, W. Hijikata, C. Hara, T. Shinshi, T. Yasuda, K. Ohuchi, A. Shimokohbe, and S. Takatani, “Hemolytic Performance of a MagLev Disposable Rotary Blood Pump (MedTech Dispo): Effects of MagLev Gap Clearance and Surface Roughness”, Artificial Organs, Vol. 30, No. 12, 2006, pp.949-954.
    10.1111/j.1525-1594.2006.00332.x
  28. H. Hoshi, J. Asama, C. Hara, W. Hijikata, T. Shinshi, A. Shimokohbe, and S. Takatani, “Detection of LV Function from the Mag-Lev Impeller Behavior”, Artificial Organs, Vol. 30, No. 5, 2006, pp.377-383.
    10.1111/j.1525-1594.2006.00229.x
  29. J. Asama, T. Shinshi, H. Hoshi, S. Takatani, and A. Shimokohbe, “A Compact Highly Efficient and Low Hemolytic Centrifugal Blood Pump with a Magnetically Levitated Impeller”, Artificial Organs, Vol. 30, No. 3, 2006, pp.160-167.
    10.1111/j.1525-1594.2006.00202.x
  30. H. Hoshi, J. Asama, T. Shinshi, K. Ohuchi, M. Nakamura, T. Mizuno, H. Arai, A. Shimokohbe, and S. Takatani, “Disposable Magnetically Levitated Centrifugal Blood Pump: Design and In Vitro Performance”, Artificial Organs, Vol. 29, No. 7, 2005, pp.520-526.
    10.1111/j.1525-1594.2005.29087.x
  31. H. Hoshi, T. Yasuda, H. Kataoka, K. Ohuchi, J. Asama, T. Shinshi, A. Shimokohbe, and S. Takatani, “Magnetically Suspended Centrifugal Blood Pump with a Radial Magnetic Driver”, ASAIO Journal, Vol. 51, No. 1, 2005, pp.60-64.
    10.1097/01.MAT.0000151148.72891.55
  32. J. Asama, T. Shinshi, H. Hoshi, S. Takatani, and A. Shimokohbe, “A New Design for a Compact Centrifugal Blood Pump with a Magnetically Levitated Rotor”, ASAIO Journal, Vol. 50, No. 6, 2004, pp.550-556.
    10.1097/01.MAT.0000144364.62671.5A