Miniaturization of magnetically suspended motor integrated with blood pump for pediatric ventricular assist device

• Project/Area Number: 16K18036
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Dynamics/Control
• Research Institution: Ibaraki University
• Principal Investigator: Osa Masahiro 茨城大学, 理工学研究科(工学野), 助教 (30735105)
• Project Period (FY): 2016-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
• Keywords: 磁気浮上モータ / 5軸制御 / 小児用人工心臓 / 小型化 / インペラダイナミクス / ダブルステータ / モータ磁気回路 / 改良型磁気浮上モータ / 血液適合性評価 / 急性動物実験 / 低消費電力化 / 遠心血液ポンプ / 流体粘性減衰 / 流体力 / 機械力学 / 制御工学 / 電磁気学 / 医用メカトロニクス / 生体医工学

Outline of Final Research Achievements

This study investigated miniaturization of 5 degrees of freedom controlled magnetically levitated motor which has double stator structure for a continuous flow pediatric ventricular assist device. Impeller dynamics considering a fluid damping and a fluid thrust force during pump operation was established to determine design specifications of magnetic suspension force for impeller suspension with a miniaturized maglev motor. The miniaturized maglev motor which has 20 mm in diameter and 34.6 mm in total height was designed and fabricated based on theoretical calculation and three-dimensional FEM analysis. The developed motor demonstrated sufficient suspension force and rotating torque for pump operation for pediatric circulatory support.

Academic Significance and Societal Importance of the Research Achievements

体格の小さな小児の体内植え込みに供せる連続流式補助人工心臓の研究開発における技術的障壁は，高い耐久性と血液適合性を有するインペラ支持機構（軸受機構）の実現と超小型化である．本研究で開発した磁気浮上モータは，インペラ姿勢のすべてを能動的に完全非接触で支持可能な特徴を有する．本課題を通し，10 ccサイズの磁気浮上モータを用いて，ポンプの非接触駆動の実現可能性を示すことができた．人工心臓用磁気浮上モータの小型化に関する限界と課題を追求することで，世界に先駆けて体内植え込み型の小児用人工心臓の早期実現へ貢献することができる．

Research Products

• [Journal Article] 小児用補助人工心臓用磁気浮上モータにおける省エネルギー化の評価 (2021)
  • Author(s): 山口清，増澤徹，長真啓，巽英介
  • Journal Title: 日本AEM学会誌 Volume: 29 Pages: 168-175
  • NAID: 130008037301
  • Peer Reviewed / Open Access
• [Journal Article] 小児用人工心臓のための超小型磁気浮上モータの改良 (2019)
  • Author(s): 織原涼雅, 増澤徹, 長真啓, 巽英介
  • Journal Title: 日本AEM学会誌 Volume: 未定
  • NAID: 130007682186
  • Peer Reviewed
• [Journal Article] Characterizing A Compact 5-DOF Controlled Self-Bearing Motor with Modified Magnetic Circuit to Improve Suspension Performance for Pediatric VAD (2019)
  • Author(s): Masahiro Osa, Toru Masuzawa, Ryoga Orihara, Eisuke Tatsumi
  • Journal Title: 日本AEM学会誌 Volume: 27 Pages: 55-60
  • NAID: 130007679945
  • Peer Reviewed
• [Journal Article] Performance Enhancement of a Magnetic System in a Ultra Compact 5-DOF-Controlled Self-Bearing Motor for a Rotary Pediatric Ventricular-Assist Device to Diminish Energy Input (2019)
  • Author(s): Masahiro Osa, Toru Masuzawa, Ryoga Orihara, Eisuke Tatsumi
  • Journal Title: Actuators Volume: 8
  • Peer Reviewed / Open Access
• [Journal Article] ダブルステータ型アキシャルギャップ磁気浮上モータの5軸制御方式を活用した小児用人工心臓循環補助時の外乱力推定と磁気浮上特性評価 (2018)
  • Author(s): 長真啓, 増澤徹，斎藤拓也, 巽英介
  • Journal Title: 日本AEM学会誌 Volume: 26 Pages: 95-101
  • NAID: 130007378382
  • Peer Reviewed
• [Journal Article] 超小型磁気浮上式小児用人工心臓の開発 (2017)
  • Author(s): 斎藤拓也, 増澤徹，長真啓, 巽英介
  • Journal Title: 日本AEM学会誌 Volume: 25 Pages: 198-204
  • NAID: 130005863398
  • Peer Reviewed
• [Journal Article] Miniaturizing 5-DOF fully controlled axial gap maglev motor for pediatric ventricular assist devices (2016)
  • Author(s): Masahiro Osa, Toru Masuzawa, Takuya Saito, Eisuke Tatsumi
  • Journal Title: International Journal of AEM Volume: Vol. 52, No. 1-2 Issue: 1-2 Pages: 191-196
  • DOI: 10.3233/jae-162224
  • Peer Reviewed / Open Access
• [Presentation] 小児用補助人工心臓の省エネルギー化に関する研究 (2021)
  • Author(s): 山口清，増澤徹，長真啓，巽英介
  • Organizer: 第30回フロンティア講演会
• [Presentation] 小児用補助人工心臓用磁気浮上モータにおける省エネルギー化の評価 (2020)
  • Author(s): 山口清，増澤徹，長真啓，巽英介
  • Organizer: 第32回「電磁力関連のダイナミクス」シンポジウム
• [Presentation] 小児用人工心臓用磁気浮上モータの小型化に関する研究 (2020)
  • Author(s): 山下俊大，増澤徹，長真啓，巽英介，西中知博
  • Organizer: 第28回日本機械学会茨城講演会
• [Presentation] 乳幼児用体内植込み型補助人工心臓に適した遠心ポンプ形状の最適化に関する研究 (2020)
  • Author(s): 築谷朋典，長真啓，西中知博，水野敏秀，増澤徹，巽英介
  • Organizer: 第58回人工臓器学会大会
• [Presentation] 小児用補助人工心臓用磁気浮上モータにおける省エネルギー化の基礎評価 (2020)
  • Author(s): 山口清，増澤徹，長真啓，巽英介
  • Organizer: 第29回MAGDAコンファレンス
• [Presentation] 超小型な磁気浮上モータを用いた遠心式小児用補助人工心臓の高性能化 (2020)
  • Author(s): 長真啓，増澤徹，山口清，片桐伸将，水野敏秀，築谷朋典，西中知博，巽英介
  • Organizer: 第48回人工心臓と補助循環懇話会学術集会
• [Presentation] Dynamic Suspension Characteristics of A Compact Double Stator Axial Gap Motor with Full Magnetic Levitation During Rotary Blood Pump Operation (2019)
  • Author(s): Masahiro Osa, Toru Masuzawa, Eisuke Tatsumi
  • Organizer: 11th Japanese-Mediterranean Workshop on Applied Electromagnetic Engineering for Magnetic, Superconducting, Multifunctional and Nanomaterial (JAPMED11)
  • Int'l Joint Research
• [Presentation] Hemolysis Testing and Adute Animal Experiment of Next Generation Ultra-Compact Centrifugal Pediatric VAD with Full Magnetic Levitation (2019)
  • Author(s): Masahiro Osa, Toru Masuzawa, Ryoga Orihara, Nobumasa Katagiri, Tomonori Tsukiya, Eisuke Tatsumi
  • Organizer: The 27th Annual Meeting of International Society for Mechanical Circulatory Support (ISMCS2019)
  • Int'l Joint Research
• [Presentation] 小児用補助人工心臓用磁気浮上モータの省エネルギー化に関する研究 (2019)
  • Author(s): 山口清，増澤徹，長真啓，巽英介
  • Organizer: 日本機械学会2019年度茨城講演会
• [Presentation] 小児用補助人工心臓のための5軸制御磁気浮上モータのインペラ支持性能評価 (2019)
  • Author(s): 長真啓，増澤徹，織原涼雅，巽英介
  • Organizer: Dynamic and Design Conference 2019
• [Presentation] 磁気浮上型遠心式小児用補助人工心臓の溶血性能評価 (2019)
  • Author(s): 長真啓，増澤徹，織原涼雅，築谷朋典，巽英介
  • Organizer: LIFE 2019
• [Presentation] 小児用補助人工心臓用磁気浮上モータの省エネルギー化に関する研究 (2019)
  • Author(s): 山口清，増澤徹，長真啓，織原涼雅，巽英介
  • Organizer: 第28回フロンティア講演会
• [Presentation] 超小型磁気浮上モータを用いた次世代型遠心連続流式小児用人工心臓の血液循環性能評価 (2019)
  • Author(s): 長真啓，増澤徹，織原涼雅，巽英介
  • Organizer: 第47回人工心臓と補助循環懇話会学術集会
• [Presentation] Characterizing A Compact 5-DOF Controlled Self-Bearing Motor with Modified Magnetic Circuit to Improve Suspension Performance for Pediatric VAD (2018)
  • Author(s): Masahiro Osa, Toru Masuzawa, Ryoga Orihara, Eisuke Tatsumi
  • Organizer: Asia-Pacific Symposium on Applied Electromagnetics and Mechanics 2018
• [Presentation] Magnetic suspension performance enhancement of ultra-compact 5-DOF controlled self-bearing motor for rotary pediatric ventricular assist device (2018)
  • Author(s): Masahiro Osa, Toru Masuzawa, Ryoga Orihara, Eisuke Tatsumi
  • Organizer: The 16th International Symposium on Magnetic Bearings
  • Int'l Joint Research
• [Presentation] 小児用人工心臓用5軸制御磁気浮上モータの高性能化 (2018)
  • Author(s): 長真啓，増澤徹，織原涼雅，巽英介
  • Organizer: D&D2018
• [Presentation] Next Generation Ultra-Compact Centrifugal Pediatric VAD Using Maglev motor with Improved Design to Enhance Energy Efficiency (2018)
  • Author(s): Masahiro Osa, Toru Masuzawa, Ryoga Orihara, Eisuke Tatsumi
  • Organizer: International Society for Mechanical Circulatory Support
  • Int'l Joint Research
• [Presentation] 小児用人工心臓のための超小型磁気浮上モータの改良 (2018)
  • Author(s): 織原涼雅，増澤徹，長真啓，巽英介
  • Organizer: MAGDAコンファレンス
• [Presentation] 磁気浮上型小児用人工心臓の研究開発 (2017)
  • Author(s): 長真啓, 増澤徹, 斎藤拓也, 巽英介
  • Organizer: 第45回人工心臓と補助循環懇話会学術集会
  • Place of Presentation: 山梨 ホテル慶山
  • Year and Date: 2017-03-10
• [Presentation] 5軸制御磁気浮上モータを用いた遠心式小児用人工心臓の開発 (2017)
  • Author(s): 長真啓, 増澤徹, 斎藤拓也, 巽英介
  • Organizer: 第29回「電磁力関連のダイナミクス」シンポジウム
• [Presentation] 磁気支持安定性向上を目指した三次元磁場解析による小児用人工心臓用5軸制御磁気浮上モータの構造検討 (2017)
  • Author(s): 織原涼雅, 増澤徹, 長真啓, 巽英介
  • Organizer: 第25回茨城講演会
• [Presentation] 小型5軸制御磁気浮上モータを用いた小児用人工心臓のポンプ性能評価 (2017)
  • Author(s): 織原涼雅, 増澤徹, 長真啓, 巽英介
  • Organizer: 第55回日本人工臓器学会大会
• [Presentation] Compact maglev motor with full DOF active control for miniaturized rotary blood pumps (2017)
  • Author(s): Masahiro Osa, Toru Masuzawa, Ryoga Orihara, Eisuke Tatsumi
  • Organizer: The 11th International Symposium on Linear Drives for Industry Applications (LDIA2017)
  • Int'l Joint Research
• [Presentation] Performance evaluation of a magnetically levitated centrifugal pediatric VAD and motor design optimization for improvement of a maglev motor (2017)
  • Author(s): Masahiro Osa, Toru Masuzawa, Ryoga Orihara, Eisuke Tatsumi
  • Organizer: The International society for mechanical circulatory support (ISMCS)
  • Int'l Joint Research
• [Presentation] Next generation ultracompact centrifugal pediatric VAD with full axis controlled maglev motor (2017)
  • Author(s): Masahiro Osa, Toru Masuzawa, Ryoga Orihara, Eisuke Tatsumi
  • Organizer: ESAO / IFAO 2017
  • Int'l Joint Research
• [Presentation] 超小型磁気浮上式小児用人工心臓の開発 (2016)
  • Author(s): 斎藤拓也, 増澤徹, 長真啓, 巽英介
  • Organizer: 第25回MAGDAコンファレンス
  • Place of Presentation: 群馬大学
  • Year and Date: 2016-11-24
• [Presentation] 超小型磁気浮上式小児用人工心臓の開発 (2016)
  • Author(s): 長真啓, 増澤徹, 斎藤拓也, 巽英介
  • Organizer: 第54回日本人工臓器学会大会
  • Place of Presentation: 米子コンベンションセンター
  • Year and Date: 2016-11-23
• [Presentation] 小児用人工心臓用超小型アキシャルギャップセルフベアリングモータの高性能化 (2016)
  • Author(s): 長真啓, 増澤徹, 斎藤拓也, 巽英介
  • Organizer: 自動制御連合講演会2016
  • Place of Presentation: 小倉国際会議場
  • Year and Date: 2016-11-10
• [Presentation] Improvement in A Next Generation Maglev Centrifugal Pediatric VAD (2016)
  • Author(s): Masahiro Osa, Toru Masuzawa, Takuya Saito, Eisuke Tatsumi,
  • Organizer: the 24th International Society for Rotary Blood pumps
  • Place of Presentation: ホテルレイクビュー水戸
  • Year and Date: 2016-09-20
  • Int'l Joint Research
• [Presentation] Miniaturization of Pediatric Ventricular Assist Device with Double Stator Maglev Motor (2016)
  • Author(s): Takuya Saito, Toru Masuzawa, Masahiro Osa Eisuke Tatsumi
  • Organizer: the 24th International Society for Rotary Blood pumps
  • Place of Presentation: ホテルレイクビュー水戸
  • Year and Date: 2016-09-20
  • Int'l Joint Research
• [Presentation] Magnetic Levitation Performance of Miniaturized Magnetically Levitated Motor with 5-DOF Active Control (2016)
  • Author(s): Masahiro Osa, Toru Masuzawa, Takuya Saito, Eisuke Tatsumi
  • Organizer: the 15th International Symposium on Magnetic Bearings
  • Place of Presentation: 門司港ホテル
  • Year and Date: 2016-08-03
  • Int'l Joint Research
• [Presentation] 小児用人工心臓用5軸制御磁気浮上モータのセンサレスモータ制御 (2016)
  • Author(s): 長真啓, 増澤徹, 斎藤拓也, 巽英介
  • Organizer: 第28回電磁力関連のダイナミクスシンポジウム
  • Place of Presentation: 慶應義塾大学
  • Year and Date: 2016-05-18
• [Book] Mechanical Circulatory and Respiratory Support: Chapter 11 “Motor design and impeller suspension” (2017)
  • Author(s): Toru Masuzawa, Masahiro Osa, Martin Mapley
  • Total Pages: 818
  • Publisher: Elsevier, Academic press
  • ISBN: 9780128104910