Masahiro OSAAssociate Professor

■Researcher basic information

Organization

  • College of Engineering Department of Mechanical Systems Engineering
  • Graduate School of Science and Engineering(Master's Program) Major in Mechanical Systems Engineering
  • Graduate School of Science and Engineerin(Doctoral Program) Major in Complex Systems Science
  • Faculty of Applied Science and Engineering Domain of Mechanical Systems Engineering

Research Areas

  • Informatics, Mechanics and mechatronics, Machine Mechanics/Control

Research Keyword

  • 医用生体工学,医用メカトロニクス,磁気浮上モータ,磁気軸受

Degree

  • 2011年03月 修士(工学)(茨城大学)

Educational Background

  • Apr. 2011 - Mar. 2014, Ibaraki University, Graduate School, Division of Science and Engineering, 生産科学専攻
  • Apr. 2009 - Mar. 2011, Ibaraki University, Graduate School, Division of Science and Engineering, 機械工学専攻
  • Apr. 2005 - Mar. 2009, Ibaraki University, Faculty of Engineering, 機械工学科

Career

  • Apr. 2012 - Mar. 2014, 独立行政法人 日本学術振興会 特別研究員DC2

■Research activity information

Award

  • Nov. 2022, 第60回日本人工臓器学会大会 大会賞 優秀賞, 第60回日本人工臓器学会大会
    Japan society
  • Nov. 2021, 日本AEM学会技術賞
    Official journal
  • Oct. 2018, 日本AEM学会論文賞, 日本AEM学会
    Japan society
  • Oct. 2017, ISMCS POSTER AWARD, ISMCS
    International society
  • Sep. 2017, IFAO Transcontinental Travel Scholarship, Austria
    International society
  • Mar. 2016, Young Investigator Award, 人工心臓と補助循環懇話会
  • Aug. 2015, D&D2014 日本機械学会機械力学・計測制御部門オーディエンス表彰
    長真啓
  • Oct. 2014, Grant MERA, 日本人工臓器学会
    Masahiro Osa
  • Sep. 2014, Asia Pacific ISRBP Young Investigator Award, International Society for Rotary Blood Pump
    Masahiro Osa
  • Nov. 2012, 日本AEM学会奨励賞, 日本AEM学会
    Masahiro Osa
  • Nov. 2011, The 20th MAGDA conference Young Author’s Award for Excellent Presentation, 日本AEM学会
    Masahiro Osa
  • Mar. 2011, 社団法人日本設計工学会武藤栄次優秀学生賞, 日本設計工学会
    Masahiro Osa
  • Mar. 2011, ライフサポート学会奨励賞, ライフサポート学会
    Masahiro Osa
  • Oct. 2010, バリアフリーシステム開発財団賞, バリアフリー開発財団(ライフサポート学会)
    Masahiro Osa
  • Feb. 2010, 人工心臓と補助循環懇話会 若手研究奨励賞銅賞
    Masahiro Osa
  • Aug. 2009, 茨城講演会 優秀講演発表賞, 日本機械学会
    Masahiro Osa

Paper

  • 3 突極磁気軸受における制御方法と安定性に関する研究               
    佐藤 遼一郎; 長 真啓; 北山 文矢; 増澤 徹, Corresponding
    日本AEM学会誌, Jun. 2025, [Reviewed]
  • 軸方向と径方向の磁場を併用したハイブリッドMR流体変速機               
    佐藤 樹; 北山 文矢; 長 真啓; 増澤 徹
    日本AEM学会誌, Jun. 2025, [Reviewed]
  • アキシャル型磁気浮上血液ポンプにおけるスクイーズ効果の検討               
    谷平 健心; 増澤 徹; 長 真啓; 北山 文矢
    日本AEM学会誌, Jun. 2025, [Reviewed]
  • 全置換型人工心臓のためのホモポーラ型磁気浮上モータの研究開発               
    佐藤 光志郎; 増澤 徹; 平口 航士朗; 北山 文矢; 長 真啓
    日本AEM学会誌, Jun. 2025, [Reviewed]
  • 人工心臓のためのハイブリッド MR 流体変速機               
    佐藤 樹; 増澤 徹; 北山 文矢; 長 真啓
    日本AEM学会誌, Jun. 2024, [Reviewed]
  • 小児用補助人工心臓用 5 軸制御セルフベアリングモータのセンサレス制御化               
    小橋 優輝; 長 真啓; 増澤 徹; 北山 文矢; 西中 知博, Corresponding
    日本AEM学会誌, Jun. 2024, [Reviewed]
  • 体内植込型全人工心臓のためのホモポーラ型磁気浮上モータ               
    鈴木 修太; 増澤 徹; 川口 哲平; 長 真啓; 北山 文矢
    日本AEM学会誌, Mar. 2024, [Reviewed]
  • Effects of biventricular shunt on pump characteristics in a maglev total artificial heart               
    Shuya Shida; Kenichi Tsushima; Masahiro Osa; Daniel L Timms; Toru Masuzawa
    The International Journal of Artificial Organs, Oct. 2023, [Reviewed]
  • Flow rate estimation of a centrifugal blood pump using the balance of control currents through the electromagnets in the magnetic bearing               
    Shuya Shida; Toru Masuzawa; Masahiro Osa; Yutaka Suzuki
    Advanced Biomedical Engineering, Oct. 2023, [Reviewed]
  • Magnetic Suspension Stability of a Compact Axial Flux Self-Bearing Motor for Implantable Pediatric Rotary Blood Pumps               
    Masahiro Osa; Toru Masuzawa; Fumiya Kitayama; Tomohiro Nishinaka; Eisuke Tatsumi
    Proceedings of 18th International Symposium on Magnetic Bearings, 19 Jul. 2023, [Reviewed]
  • 磁気浮上補助人工心臓のための制御周波数の検討               
    齋藤 広明; 増澤 徹; 長 真啓; 北山 文矢
    日本AEM学会誌, Apr. 2023, [Reviewed]
  • Dynamic Suspension Performance of an Ultra-Compact 5-DOF Controlled Axial Gap Type Self-Bearing Motor for Use in Pediatric Ventricular Assist Device               
    Masahiro Osa; Toru Masuzawa; Toshihiro Yamashita; Eisuke Tatsumi
    Proc. of the 17th ISMB, Aug. 2021, [Reviewed]
  • 補助人工心臓装着を支援する自己接合型脱血管の研究開発               
    吉田尚記,増澤徹,長真啓,尾関和秀,岸田晶夫,築谷朋典,水野敏秀,西中知博,巽英介
    ライフサポート学会誌, Jul. 2021, [Reviewed]
  • Double Stator Axial Gap Type Ultra-Compact 5-DOF Controlled Self-bearing Motor for Rotary Pediatric VAD               
    Masahiro Osa; Toru Masuzawa; Kiyoshi Yamaguchi; Eisuke Tatsumi, Lead
    IEEE Transactions on Industry Applications, Jul. 2021, [Reviewed]
  • 人工心臓への適用を目的としたホモポーラ型磁気軸受の耐加速度性能評価               
    上田優人,増澤徹,長真啓
    日本AEM学会誌, Apr. 2021, [Reviewed]
  • 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               
    山口清,増澤徹,長真啓,巽英介, Corresponding
    日本AEM学会誌, Apr. 2021, [Reviewed]
  • Dynamic motion analysis of impeller for the development of real-time flow rate estimations of a ventricular assist device               
    Shuya Shida; Toru Masuzawa; Masahiro Osa
    The International Journal of Artificial Organs, Dec. 2020, [Reviewed]
  • 冠動脈バイパス術における血管接合支援デバイスの研究開発               
    羽根田洋輔; 増澤徹; 長真啓; 尾関和秀; 岸田晶夫; 巽英介
    ライフサポート学会誌, Dec. 2019, [Reviewed]
  • Characterizing A Compact 5-DOF controlled Self-Bearing Motor with Modified Magnetic Circuit to Improve Suspension Performance for Pediatric VAD               
    Masahiro OSA; Toru MASUZAWA; Ryoga ORIHARA; Eisuke TATSUMI, Lead
    日本AEM学会誌, Jul. 2019, [Reviewed]
  • 小児用人工心臓のための超小型磁気浮上モータの改良               
    織原涼雅; 増澤徹; 長真啓; 巽英介, Corresponding
    日本AEM学会誌, Jun. 2019, [Reviewed]
  • 全置換型磁気浮上連続流人工心臓の流量バランス制御のための数値流体解析を用いた右心用ポンプの改良               
    牧田丈靖; 増澤徹; 信太宗也; 長真啓; Daniel L Timms
    ライフサポート, Jun. 2019, [Reviewed]
  • 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               
    Masahiro Osa; Toru Masuzawa; Ryoga Orihara; Eisuke Tatsumi, Lead
    Actuators, Apr. 2019, [Reviewed]
  • Flow rate estimation of a centrifugal blood pump using the passively stabilized,eccentric position of a magnetically levitated impeller               
    Shuya Shida; Toru Masuzawa; Masahiro Osa
    The International Journal of Artificial Organs, Feb. 2019, [Reviewed]
  • Radial stiffness improvement of magnetically levitated total artificial heart with a permanent magnetic bearing               
    Tomoyasu Makida; Toru Masuzawa; Yoshiaki Koda; Masahiro Osa; Daniel L. Timms
    日本AEM学会誌, Jun. 2018, [Reviewed]
  • The 4 axes control magnetic bearing for a ventricular assist devece               
    Ayaka Koizumi; Toru Masuzawa; Masahiro Osa
    日本AEM学会誌, Jun. 2018, [Reviewed]
  • Evaluation of radial stability of maglev blood pump for extracorporeal circulation driven to synchronize with heart beat               
    Ryota Sato; Toru Masuzawa; Masahiro Osa; Kohei Ohno; Takashi Nishimura; Syunei Kyo
    日本AEM学会誌, Jun. 2018, [Reviewed]
  • Centrifugal pediatric ventricular assist device with 5-DOF controlled self-bearing motor               
    Masahiro Osa; Toru Masuzawa; Takuya Saito; Eisuke Tatsumi
    日本AEM学会誌, Mar. 2018, [Reviewed]
  • Effects of eccentric impeller position on radial passive stability in a magnetically levitated centrifugal blood pump with a double volute
    Shuya Shida; Toru Masuzawa; Masahiro Osa; Ryota Sato, Evaluation of the impeller radial stability is important from the bioengineering point of view in the development of mechanical circulatory support devices (MCSDs) for safer use as bridge for several months or destination therapy for years. In this study, radial stability of a magnetically levitated impeller in a centrifugal blood pump with an axially magnetic suspension system was evaluated by investigating the effects of the eccentric impeller position on passive stability, aiming to propose a pump design guide for the development and safer clinical use of MCSDs. First, impeller displacements in the prototype pump were measured using a mock loop together with laser displacement sensors. Then, the radial hydraulic forces exerted on an eccentric impeller were calculated using computational fluid dynamics (CFD) analysis for four volute-casing geometries. In addition, hemocompatibility was assessed using CFD calculations of scalar shear stress exerted on blood. Measurement of impeller displacement showed that the displacement varied from 0.56 to 0.27 mm at a rotational speed of 1800 rpm as the flow rate increased from 0 to 6.5 L/min. In the CFD calculation, the radial hydraulic force increased linearly from 0.2 to 1.7 N as the impeller displacement increased from 0 to 0.5 mm for all the double volute geometries, under conditions of a rotational speed of 1800 rpm and flow rates of 3, 5 and 7 L/ min. These results indicate that the impeller stability in the prototype pump is acceptable at the operation conditions of ventricular assist devices, because the magnetic bearing stiffness of radial component was 4.1 N/mm. In the pressure recovery analysis of eccentric impellers, a double volute was not effective because of the unbalanced pressure field generated by the unbalanced pressure recovery. Thus, the increase in radial hydraulic force associated with an eccentric impeller could not be avoided by changing the conventional double volute design. The CFD analysis of geometrical variation indicated that widening of the radial clearance is an effective approach to improve the radial stability as well as hemocompatibility, although the radial clearance should be designed based on trade-offs among impeller stability, hemocompatibility and pump performance., Japanese Society for Medical and Biological Engineering
    Advanced Biomedical Engineering, 2018, [Reviewed]
  • Magnetic Levitation Performance of Miniaturized Magnetically Levitated Motor with 5-DOF Active Control
    Masahiro Osa; Toru Masuzawa; Takuya Saito; Eisuke Tatsumi,

    Mechanical circulatory support (MCS) therapy plays a significant role in an alternative therapy of heart transplants for pediatric heart disease patients. However, continuous flow rotary MCS devices for pediatric patients are still undergoing development, and have not been clinically available technology. Technical difficulties, such as high durability, better blood compatibility and miniature device size, prevent the pediatric MCS devices development. In this study, a double stator axial gap maglev motor for pediatric MCS device has been developed. The maglev motor has two identical motor stators, and a levitated rotor impeller which is aligned between the stators. The levitated rotor impeller is fully suspended with 5-degrees of freedom (5-DOF) active control. A double stator mechanism enhances motor torque production. A miniaturized maglev motor was designed and developed based on FEM magnetic field analysis for use in implantable ventricular assist devices (VADs). The diameter and height of the developed maglev motor are 22 mm and 33 mm. This paper is an initial report on the magnetic levitation and rotation performance of the miniaturized maglev motor. The levitated rotor impeller was magnetically levitated and rotated with the 5-DOF active control. The oscillation amplitudes (x, y and z) and inclination angles (θx and θy) of the levitated rotor impeller were then evaluated in both air and water. The developed maglev motor achieved non-contact rotation up to 1600 rpm in air and 4500 rpm in water, respectively. The oscillation amplitudes and inclination angles were sufficiently suppressed in water due to fluid damping. After these experiments, a magnetic circuit of the maglev motor was modified in order to achieve further stable levitation. The developed maglev motor then indicated potential to achieve the practical use of maglev rotatory pediatric VAD.

    , The Japan Society of Mechanical Engineers
    Mechanical Engineering Journal, Oct. 2017, [Reviewed]
  • Compact Maglev Motor with Full DOF Active Control for Miniaturized Rotary Blood Pumps               
    Masahiro Osa; Toru Masuzawa; Ryoga Orihara; Eisuke Tatsumi
    Proc. of LDIA2017, Sep. 2017, [Reviewed]
  • Miniaturization of Pediatric VAD with 5-DOF Controlled Maglev Motor
    Takuya Saito; Toru Masuzawa; Masahiro Osa; Eisuke Tatsumi,

    A 5-degrees of freedom (5-DOF) controlled maglev motor and a centrifugal blood pump have been developed for pediatric ventricular assist devices (VADs). The magnetically suspended pediatric VAD consists of a top stator, a bottom stator and a levitated impeller. A double stator mechanism enhances a torque production. The maglev pediatric VAD has an outer diameter of 22 mm, a total length of 34 mm and a total volume of 18 cc. In this study the pump performance of the developed centrifugal pump was investigated, as well as the magnetic suspension ability of the developed 5-DOF controlled self-bearing motor was evaluated. The developed maglev pediatric VAD produced a flow rate up to 2.5 L/min against a pump head pressure of 100 mmHg at an impeller rotating speed of 5000 rpm. The maximum oscillation amplitudes that were 0.08 mm in axial direction and 0.19 mm in radial direction were less than the clearance of the centrifugal blood pump.

    , The Japan Society of Applied Electromagnetics and Mechanics
    Journal of the Japan Society of Applied Electromagnetics and Mechanics, Jun. 2017, [Reviewed]
  • The Repulsive Passive Magnetic Bearing for the Magnetically Levitated Artificial Heart
    Yoshiaki Koda; Toru Masuzawa; Masahiro Osa; Daniel L Timms,

    We have developed a magnetically levitated total artificial heart. The stator of the device has a magnetic bearing and a motor stator set at center of the device. The left and right impellers are connected by a shaft through the center hall of the stator core. The axial position and tilting of the levitated impeller are controlled by the magnetic bearing. The radial displacement of the impeller is supported with a passive stability. We propose the application of a repulsive passive permanent magnetic bearing, PMB, for improvement of the radial stiffness of the device. A magnetic field analysis with finite element method was performed to investigate a suitable PMB. As a result, the PMB which has two radially magnetized outer permanent magnets and an axial magnetized inner permanent magnet has better performance and the radial stiffness increased up to 2.5 times of passive stability's one.

    , The Japan Society of Applied Electromagnetics and Mechanics
    Journal of the Japan Society of Applied Electromagnetics and Mechanics, Jun. 2017, [Reviewed]
  • Miniaturizing 5-DOF fully controlled axial gap maglev motor for pediatric ventricular assist devices
    Masahiro Osa; Toru Masuzawa; Takuya Saito; Eisuke Tatsumi, An axial gap maglev motor with double stators that can control five-degrees of freedom (5-DOF) of rotor postures has been newly developed for pediatric ventricular assist devices (VADs). The motor has two stators that have an identical structure and a levitated rotor. The rotor is levitated magnetically between the stators and is driven by the mechanism of a synchronous permanent magnet motor. A double-stator structure achieves active 5-DOF posture control and enhances torque production. In this paper, a maglev motor as an actuator of pediatric VAD has been designed and miniaturized based on magnetic field FEM analysis. The performance of the maglev motor, the static magnetic suspension force and the torque of the developed motor, is measured experimentally and is sufficient for stable levitation and rotation., IOS PRESS
    International Journal of Applied Electromagnetics and Mechanics, Sep. 2016, [Reviewed]
  • 小児用補助人工心臓のための小型磁気浮上モータの第一試作
    Naoki Omori; Toru Masuzawa; Masahiro Osa; Eisuke Tatsumi, A miniaturized magnetically levitated motor which can actively control 5-degrees of freedom (5-DOF) of impeller postures has been newly developed for a paediatric ventricular assist device (VAD). Developed motor consists of a top stator, a bottom stator and a levitated impeller that is set between the both stators. The diameter and the height of the motor are 28 mm and 41 mm, respectively. Magnetic field analysis with finite element method was performed in order to design the geometry of motor permanent magnets and a stator. Corners of the motor permanent magnets were cut to produce sinusoidal distribution of magnetic flux density and to reduce the cogging torque. The developed maglev motor produces sufficient suspension force and rotates the levitated impeller up to a rotating speed of 6000 rpm with sufficient posture control performance., The Japan Society of Applied Electromagnetics and Mechanics
    Journal of the Japan Society of Applied Electromagnetics and Mechanics, 2015, [Reviewed]
  • 磁気浮上心臓治療用血液ポンプへのセンサレスモータ制御の適用               
    Naoki Omori; Toru Masuzawa; Masahiro Osa; Takumi Shimohori; Takashi Nishimura; Shunei Kyo
    Journal of the Japan Society of Applied Electromagnetics and Mechanics, 2015, [Reviewed]
  • Radial position active control of double stator axial gap self-bearing motor for padiatric VAD               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    Mechanical Engineering Journal, 2015, [Reviewed]
  • 5-DOF Control Miniaturized Self-bearing Motor for Paediatric Ventricular Assist Device
    Masahiro Osa; Toru Masuzawa; Naoki; Omori; Eisuke Tatsumi, 日本AEM学会
    Journal of the Japan Society of Applied Electromagnetics and Mechanics, Jun. 2014, [Reviewed]
  • Miniaturized axial gap maglev motor with vector control for pediatric artificial heart               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    Journal of the Japan Society of Applied Electromagnetics and Mechanics, Jun. 2012, [Reviewed]
  • Magnetically suspended double stator motor for pediatric artificial heart               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    Journal of the Japan Society of Applied Electromagnetics and Mechanics, Jun. 2011, [Reviewed]

MISC

  • 超小型セルフベアリングモータの小児用補助人工心臓への応用               
    長 真啓; 増澤 徹
    精密工学会誌, Nov. 2023
  • 革新的磁気浮上技術を用いた次世代型小児用補助人工心臓の研究開発
    長真啓; 増澤徹; 北山文矢; 西中知博; 築谷朋典; 水野敏秀; 梅木昭秀; 巽英介
    人工臓器(日本人工臓器学会), 2023
  • Magnetic Levitation Performance of Miniaturized Magnetically Levitated Motor with 5-DOF Active Control
    Masahiro Osa; Toru Masuzawa; Takuya Saito; Eisuke Tatsumi
    Proceedings of 15th International Symposium on Magnetic Bearings, 06 Aug. 2016, [Reviewed]
  • Radial Position Active Control of Double Stator Axial Gap Self-bearing Motor for Paediatric VAD               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    Proceedings of 14th International Symposium on Magnetic Bearings, 12 Aug. 2014, [Reviewed]
  • 5-DOF control double stator motor for paediatric ventricular assist device               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    Proceedings of the 13th International Symposium on Magnetic Bearings, Aug. 2012
  • Miniaturized magnetically levitated motor for pediatric artificial heart               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    Proceedings of the 12th International Symposium on Magnetic Bearings, Aug. 2010

Books and other publications

  • Mechanical Circulatory and Respiratory Support               
    Shaun D. Gregory; Michael C. Stevens; John F. Fraser, Contributor
    Elsevier, Academic press, 13 Oct. 2017

Lectures, oral presentations, etc.

  • A Magnetically Levitated Pediatric Centrifugal Ventricular Assist Device with Double Stator Axial Gap Type Self-Bearing Motor               
    Masahiro Osa; Toru Masuzawa; Fumiya Kitayama; Tomohiro Nishinaka; Tomonori Tsukiya; Toshihide Mizuno; Akihide Umeki; Eisuke Tatsumi
    International Society for Mechanical Circulatory Support, 05 Dec. 2024
  • 磁気浮上型小児用補助人工心臓の血液ポンプ変動回転駆動時におけるインペラ支持性能               
    長真啓; 増澤徹; 北山文矢; 長澤優樹; 佐藤遼一郎; 築谷朋典; 水野敏秀; 梅木昭秀; 西中知博
    第33回MAGDAコンファレンス, 18 Nov. 2024
  • A Magnetically Levitated Centrifugal Blood Pump with Improved Maglev Motor Geometries for an Implantable Pediatric VAD               
    Masahiro Osa; Toru Masuzawa; Fumiya Kitayama; Tomohiro Nishinaka; Tomonori Tsukiya; Toshihide Mizuno; Akihide Umeki; Eisuke Tatsumi
    International Society for Mechanical Circulatory Support, 15 Nov. 2024
  • 小型磁気浮上モータを用いた体内植込み型小児用補助人工心臓の研究開発               
    長真啓; 増澤徹; 北山文矢; 西中知博; 築谷朋典; 水野敏秀; 梅木昭秀; 巽英介
    LIFE2024, 12 Sep. 2024
  • 磁気浮上式血液ポンプにおける粘性流体送液時のインペラ支持性能               
    長真啓、増澤徹、北山文矢、西中知博、築谷朋典、巽英介
    第32回MAGDAコンファレンス, 27 Nov. 2023
  • 小児用補助人工心臓用磁気浮上モータのセンサレス制御化               
    小橋 優輝,長 真啓,増澤 徹,北山 文矢,西中 知
    第32回MAGDAコンファレンス, 27 Nov. 2023
  • 小型磁気浮上モータを用いた小児用補助人工心臓の研究開発               
    長真啓、増澤徹、北山文矢、西中知博、築谷朋典、水野敏秀、梅木明秀、巽英介
    第61回人工臓器学会大会, 10 Nov. 2023
  • Research progress of an implantable continuous flow pediatric VAD with ultra-compact maglev motor               
    Masahiro Osa; Toru Masuzawa; Fumiya Kitayama; Tomohiro Nishinaka; Tomonori Tsukiya; Toshihide Mizuno; Akihide Umeki; Eisuke Tatsumi
    The 29th Annual meeting of the International Society for Mechanical Circulatory Support, 01 Nov. 2023
  • Pediatric maglev VAD               
    Masahiro Osa; Toru Masuzawa; Fumiya Kitayama; Tomohiro Nishinaka; Tomonori Tsukiya; Toshihide Mizuno; Akihide Umeki; Eisuke Tatsumi
    The 29th Annual meeting of the International Society for Mechanical Circulatory Support, 31 Oct. 2023
  • 分割巻線を用いた磁気浮上型小児用補助人工心臓の,性能評価               
    長澤 優樹; 長 真啓; 北山文矢,増澤 徹
    茨城講演会, 18 Aug. 2023
  • 小児用磁気浮上型補助人工心臓の粘性液体下におけ,るポンプ性能とインペラ支持性能評価               
    佐藤 遼一郎; 長 真啓; 北山文矢,増澤 徹
    茨城講演会, 18 Aug. 2023
  • Magnetic Suspension Stability of a Compact Axial Flux Self-Bearing Motor for Implantable Pediatric Rotary Blood Pumps               
    Masahiro Osa; Toru Masuzawa; Fumiya Kitayama; Toshihiro Yamashita; Eisuke Tatsumi
    The 18th International Symposium on Magnetic Bearings, 18 Jul. 2023
  • 小児用補助人工心臓のための磁気浮上型遠心式血液ポンプの性能評価               
    長 真啓、増澤 徹、西中 知博、築谷 朋典、水野 敏秀、梅木 昭秀、巽 英介
    第51回人工心臓と補助循環懇話会学術集会, 18 Feb. 2023
  • Continuous Flow Centrifugal Pediatric Ventricular Assist Device with an Innovative Compact Magnetically Levitated Motor               
    長真啓、増澤徹、西中知博、築谷朋典、水野敏秀、梅木明秀、巽英介、柳園宜紀、一ノ瀬高紀
    第60回人工臓器学会大会, 04 Nov. 2022
  • 小型磁気浮上モータを用いた小児用補助人工心臓の研究開発               
    長真啓、増澤徹、西中知博、築谷朋典、水野敏秀、梅木明秀、巽英介、柳園宜紀、一ノ瀬高紀
    第60回人工臓器学会大会, 03 Nov. 2022
  • 磁気浮上型小児用補助人工心臓の右心補助人工心臓ポンプへの応用の検討               
    長 真啓; 増澤 徹; 築谷 朋典; 西中 知博; 巽 英介
    日本定常流ポンプ研究会学術集会2022, 03 Nov. 2022
  • 小児用補助人工心臓用5軸制御セルフベアリングモータの駆動系簡素化の検討               
    長真啓、増澤徹、北山文矢、西中知博、巽英介
    第31回MAGDAコンファレンス, 01 Nov. 2022
  • 磁気浮上型遠心式小児用補助人工心臓の異なるボリュート形状におけるインペラ磁気支持性能               
    長 真啓; 増澤 徹; 築谷 朋典; 西中 知博; 巽 英介
    Dynamics and Design Conference 2022, 07 Sep. 2022
  • 小児用補助人工心臓用磁気浮上モータの外径拡大による高支持力・高トルク化の検討               
    小橋 優輝; 長 真啓; 増澤 徹; 西中 知博
    茨城講演会, 18 Aug. 2022
  • 体内埋込み型磁気浮上式小児用補助人工心臓の動物実験に向けた改良               
    長真啓、増澤徹、西中知博、築谷朋典、巽英介
    第34回「電磁力関連のダイナミクス」シンポジウム, 12 May 2022
  • 革新的磁気浮上技術を応用した体内植込み型小児用補助人工心臓の研究開発               
    長真啓、増澤徹、西中知博、築谷朋典、水野敏秀、片桐伸将、巽英介、柳園宜紀、一ノ瀬高紀
    第50回人工心臓と補助循環懇話会学術集会, 22 Apr. 2022
  • 磁気浮上型小児用補助人工心臓の高度化に関する研究               
    山下俊大,増澤徹,長真啓,巽英介,西中知博
    第31回フロンティア講演会, 07 Mar. 2022
  • 小児用補助人工心臓用磁気浮上モータの異なる制御軸数における磁気支持性能と電力特性の評価               
    山下俊大,増澤徹,長真啓,巽英介,西中知博
    第30回MAGDAコンファレンス, 06 Dec. 2021
  • 小型遠心血液ポンプを用いた磁気浮上型小児用補助人工心臓の研究開発               
    長真啓,山下俊大,増澤徹,西中知博,築谷朋典,水野敏秀,片桐伸将,巽英介,柳園宣紀,一ノ瀬高紀
    日本定常流ポンプ研究会学術集会2021, 27 Nov. 2021
  • 乳幼児用体内埋込み型補助人工心臓開発に向けた数値流体解析による磁気浮上式遠心血液ポンプ設計の検討               
    信太宗也,増澤徹,築谷朋典,長真啓,西中知博,巽英介
    第59回人工臓器学会大会, 26 Nov. 2021
  • 超小型な磁気浮上モータを用いた小児用人工心臓の性能評価               
    長真啓,山下俊大,増澤徹,西中知博,築谷朋典,水野敏秀,片桐伸将,巽英介,柳園宣紀,一ノ瀬高紀
    第59回人工臓器学会大会, 26 Nov. 2021
  • 小児用人工心臓用アキシャル型セルフベアリングモータの動特性評価               
    長真啓,増澤徹,築谷朋典,西中知博,巽英介
    Dynamics and Design Conference 2021, 16 Sep. 2021
  • Dynamic Suspension Performance of an Ultra-Compact 5-DOF Controlled Axial Gap Type Self-Bearing Motor for Use in Pediatric Ventricular Assist Device               
    Masahiro Osa; Toru Masuzawa; Toshihiro Yamashita; Eisuke Tatsumi
    The 17th International Symposium on Magnetic Bearings, 20 Aug. 2021
  • 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               
    第33回「電磁力関連のダイナミクス」シンポジウム, 19 May 2021
  • 超小型5軸制御磁気浮上モータを用いた乳幼児・小児用 補助人工心臓の研究開発               
    Masahiro Osa; Toru Masuzawa; Takuya Saito; Eisuke Tatsumi
    第54回日本人工臓器学会大会, 25 Nov. 2016
  • 超小型5軸制御磁気浮上モータを用いた乳幼児・小児用補助人工心臓の研究開発               
    Masahiro Osa; Toru Masuzawa; Takuya Saito; Eisuke Tatsumi
    第54回日本人工臓器学会大会, 25 Nov. 2016
  • 超小型磁気浮上式 小児用人工心臓の開発               
    斎藤 拓也; 増澤 徹; 長 真啓; 巽 英介
    第25回MAGDAコンファレンス, 24 Nov. 2016
  • 全置換型磁気浮上人工心臓のための反発型磁気軸受の検討               
    國府田 芳彰; 増澤 徹; 長 真啓; Daniel L TIMMS
    第25回MAGDAコンファレンス, 24 Nov. 2016
  • 超小型磁気浮上式小児用人工心臓の開発               
    斎藤 拓也,増澤 徹,長 真啓,巽 英介
    第25回MAGDAコンファレンス, 24 Nov. 2016
  • Optimization of 5-DOF controlled axial gap type self-bearing motor for pediatric VADcontrol               
    Masahiro Osa; Toru Masuzawa; Takuya Saito; Eisuke Tatsumi
    第59回自動制御連合講演会, 10 Nov. 2016
  • Maglev motor optimization for total artificial heart with a single actuatorsynchronize with heart beat               
    Yoshiaki KODA,Toru MASUZAWA,Masahiro OSA,Daniel L TIMMS
    International Society for Rotary Blood Pump 2016, 22 Sep. 2016
  • Improvement in A Next Generation Maglev Centrifugal Pediatric VAD               
    Masahiro Osa; Toru Masuzawa; Takuya Saito; Eisuke Tatsumi
    International Society for Rotary Blood Pump 2016, 21 Sep. 2016
  • Magnetically levitated blood pump for extracorporeal circulation driven to synchronize with heart beat               
    Ryota Sato,Toru Masuzawa,Masahiro Osa,Takashi Nishimura,Shunei Kyo,; Noritsugu Naito,Eisuke Tatsumi
    International Society for Rotary Blood Pump 2016, 21 Sep. 2016
  • Miniaturization of Pediatric Ventricular Assist Device with A Double Stator Maglev Motor               
    Takuya Saito; Toru Masuzawa; Masahiro Osa; Eisuke Tatsumi
    International Society for Rotary Blood Pump 2016, 20 Sep. 2016
  • 全置換型人工心臓用磁気浮上モータの改良               
    國府田 芳彰; 増澤 徹; 長 真啓; Daniel L Timms
    LIFE2016, 04 Sep. 2016
  • 心臓治療を目的とした磁気浮上型 体外循環血液ポンプの研究開発               
    佐藤 遼太; 増澤 徹; 長 真啓; 西村 隆; 許 俊鋭
    茨城講演会, 26 Aug. 2016
  • 複合低エネルギ生体組織接合技術 における生体組織構造変化の可視化               
    小泉 綾香; 増澤 徹; 長 真啓; 尾関 和秀; 岸田 晶夫
    茨城講演会, 26 Aug. 2016
  • 心臓治療を目的とした磁気浮上型体外循環血液ポンプの研究開発               
    佐藤 遼太,増澤 徹 ,長 真啓 ,西村 隆 ,許 俊鋭
    茨城講演会, 26 Aug. 2016
  • 複合低エネルギ生体組織接合技術における生体組織構造変化の可視化               
    小泉 綾香,増澤 徹,長 真啓,尾関 和秀,岸田 晶夫
    茨城講演会, 26 Aug. 2016
  • Magnetic Levitation Performance of Miniaturized Magnetically Levitated Motor with 5-DOF Active Control               
    Masahiro Osa; Toru Masuzawa; Takuya Saito; Eisuke Tatsumi
    The 14th International Symposium on Magnetic Bearings, 06 Aug. 2016
  • Sensorless Motor Control of 5-DOF Controlled Maglev Motor for Pediatric VAD               
    Masahiro Osa; Toru Masuzawa; Takuya Saito; Eisuke Tatsumi
    第27回電磁力関連のダイナミクスシンポジウム, 19 May 2016
  • レオメータを使用したせん断流れ場における血液接触面の表面粗さと溶血量の関係               
    中嶋 翔太; 丸山 修; 西田 正浩; 足立 吉數; 長 真啓; 増澤 徹
    生体医工学会, 28 Apr. 2016
  • 連続流式小児用補助人工心臓の研究開発               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    第44回人工心臓と補助循環懇話会学術集会, 04 Mar. 2016
  • 次世代型磁気浮上式小児用補助人工心臓の開発現状               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    第53回日本人工臓器学会大会, 21 Nov. 2015
  • Speed modulation of magnetically levitated rotary blood pump with sensorless motor control               
    Masahiro Osa; Toru Masuzawa; Takumi Shimohori; Takashi Nishimura; Shunei Kyo
    第58回自動制御連合講演会, 14 Nov. 2015
  • Pulsatile Flow Regulation of Extracorporeal Magnetically Levitated Rotary Blood Pump for Acute Heart Failure               
    Masahiro Osa; Toru Masuzawa; Takumi Shimohori; Takashi Nishimura; Shunei Kyo
    International Society for Rotary Blood Pump 2015, 28 Sep. 2015
  • Miniaturizing 5-DOF fully controlled axial gap maglev motor for pediatric ventricular assist devices               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    The 17th International Symposium on,Applied Electromagnetics and Mechanics, 16 Sep. 2015
  • Characterizing Magnetically Levitated Pediatric VAD and Further Miniaturization of Magnetic System               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    The 61th Annual Conference of American Society for Artificial Internal Organs, 25 Jun. 2015
  • Motor Speed Sensorless Control of 5-DOF controlled Magnetically Levitated Pediatric VAD               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    第26回電磁力関連のダイナミクスシンポジウム, 15 May 2015
  • Mechanical circulatory support deviceの最新研究               
    Toru Masuzawa; Masahiro Osa
    第54回 日本生体医工学会大会, 07 May 2015
  • 磁気浮上型心臓治療用血液ポンプへのセンサレスモータ制御の適用               
    Naoki Omori; Toru Masuzawa; Masahiro Osa; Eisuke Tatsumi
    第23回MAGDAコンファレンス, 04 Dec. 2014
  • 5軸制御磁気浮上モータを用いた乳幼児,小児用補助人工心臓の開発               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    第52回日本人工臓器学会大会, 19 Oct. 2014
  • A Magnetically Levitated Rotary Centrifugal Pump For Pediatric Ventricular Assist Device               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    International Society for Rotary Blood Pump 2014, 26 Sep. 2014
  • Pediatric VAD with five degrees of freedom control Maglev motor               
    Toru Masuzawa; Masahiro Osa; Naoki Omori; Eisuke Tatsumi
    41st Annual Congress European Society for Artificial Organs, 18 Sep. 2014
  • 小児用磁気浮上人工心臓のインペラ浮上安定性               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    Dyamics and Design Conference 2014, 27 Aug. 2014
  • Radial Position Active control of Double Stator Axial Gap Self-bearing Motor for Paediatric VAD               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    The 14th International Symposium on Magnetic Bearings, 14 Aug. 2014
  • 小児用人工心臓のための小型磁気浮上モータの開発               
    Naoki Omori; Toru Masuzawa; Masahiro Osa; Eisuke Tatsumi
    第26回電磁力関連のダイナミクスシンポジウム, 22 May 2014
  • 小児,乳幼児用人工心臓のための5軸制御磁気浮上モータ               
    長 真啓; 増澤 徹; 大森 直樹; 巽 英介
    ライフサポート学会 フロンティア講演会, Mar. 2014
  • 乳幼児,小児に適用可能な磁気浮上人工心臓の開発               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    第43回人工心臓と補助循環懇話会学術集会, Mar. 2014
  • 小児用人工心臓のための小型5軸制御セルフベアリングモータ               
    Masahiro Osa; Toru Masuzawa; Naoki Omori; Eisuke Tatsumi
    第22回MAGDAコンファレンス, Dec. 2013
  • Characterizing the Magnetic Motor-Bearing of a Rotary TAH to improve pressuresensitivity               
    Masahiro Osa; Toru Masuzawa; Hiroyuki Tokoi; Nobuyuki Kurita; Nicholas Greatrex; Daniel L. Timms
    The 21st Congress of the International Society for Rotary Blood Pumps, Sep. 2013
  • Motor performance of magnetically levitated paediatric VAD               
    Naoki Omori; Toru Masuzawa; Masahiro Osa; Eisuke Tatsumi
    The 5th Congress of the International Federation for Artificial Organs, Sep. 2013
  • 小児用人工心臓のための小型磁気浮上モータにおけるロータ永久磁石形状の検討               
    Naoki Omori; Toru Masuzawa; Masahiro Osa; Eisuke Tatsumi
    生活生命支援医療福祉工学系学会連合大会, Sep. 2013
  • 小児用人工心臓への応用を目指した5軸制御型小型磁気浮上モータの開発               
    Naoki Omori; Toru Masuzawa; Masahiro Osa; Eisuke Tatsumi
    日本機械学会 茨城講演会, Aug. 2013
  • 乳児用人工心臓用ダブルステータ型磁気浮上モータの開発               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    第42回人工心臓と補助循環懇話会学術集会, Feb. 2013
  • 乳児用人工心臓への応用を目指した5自由度制御型磁気浮上モータの開発               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    第25回バイオエンジニアリング講演会, Jan. 2013
  • 5-DOF control double stator maglev motor for paediatric ventricular assist divice               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    The 13th International Symposium on Magnetic Bearings, Aug. 2012
  • 乳児用人工心臓のための5自由度制御型磁気浮上モータ               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    第50回人工心臓学会大会, Nov. 2011
  • Evaluation of the maglev motor and design the centrifugal blood pump for pediatric artificial heart               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    4th Joint European Society for Artificial Organs – International Federation for Artificial Organs Congress 2011, Oct. 2011
  • Double stator maglev artificial heart for infant patients               
    Masahiro Osa; Toru Masuzawa; Eisuke Tatsumi
    The 57th Annual Conference of American Society for Artificial Internal Organs, Jun. 2011

Affiliated academic society

  • Sep. 2015, International Society for Rotary Blood Pump
  • Feb. 2015, American Society for Internal Artificial Organs
  • Mar. 2014, 日本人工臓器学会
  • Apr. 2011, 日本生体医工学会
  • Feb. 2011, 日本設計工学会
  • Nov. 2010, 日本AEM学会
  • Oct. 2010, ライフサポート学会
  • Jan. 2009, 日本機械学会

Research Themes

  • ALL JAPANで挑む革新的植込型小児用補助人工心臓の開発               
    医療機器等における先進的研究開発・開発体制強靱化事業
    茨城大学
    Aug. 2024 - Mar. 2027
  • 世界で活躍できる研究者育成プログラム総合支援事業               
    Dec. 2022 - Mar. 2027
  • 超小型・低支持剛性磁気浮上系の制御軸間相互影響の解明と磁気支持安定化               
    基盤研究(C)
    Apr. 2023 - Mar. 2026
  • 高い耐久性と安全性を実現する革新的な超小型磁気浮上型小児用補助人工心臓の研究開発               
    Oct. 2022 - Mar. 2025
  • 革新的な小型磁気浮上モータを応用した体内植込み型小児用補助人工心臓トータルシステムの確立               
    Apr. 2022 - Jun. 2023
  • 生体流体機能を積極的に活用した超小型磁気浮上式小児用人工心臓の実現               
    若手研究
    Apr. 2020 - Mar. 2023
  • 重症心不全小児の救命を目指した高い耐久性と安全性を有する超小型な磁気浮上型遠心式補助人工心臓の研究開発               
    Aug. 2019 - Mar. 2021
  • 世界初・世界最小の次世代型小児用人工心臓実現を目指したダブルステータ型5軸制御磁気浮上モータの超小型化 - 超小型磁気浮上人工心臓の実現への挑戦 -               
    Sep. 2019 - Sep. 2020
  • Miniaturization of maglev motor for pediatric ventricular assist device               
    若手(B)
    Apr. 2016 - Mar. 2020
  • 世界初・世界最小の次世代型小児用人工心臓実現を目指したダブルステータ型5軸制御磁気浮上モータの超小型化-磁気浮上人工心臓システムの構築と有効性検証-               
    Sep. 2018 - Sep. 2019
  • 耐久性と信頼性を追求した超小型な磁気浮上型遠心式小児用人工心臓の研究開発               
    Aug. 2018 - Mar. 2019
  • 世界初・世界最小の次世代型小児用人工心臓実現を目指したダブルステータ型5軸制御磁気浮上モータの超小型化               
    Sep. 2017 - Sep. 2018
  • 複合低エネルギー生体組織接合のコラーゲン構造変化可視化と冠動脈血管吻合への適用               
    挑戦的萌芽研究
    Apr. 2015 - Mar. 2018
  • 次世代型小児用人工心臓のための世界最小5軸制御アキシャルギャップ磁気浮上モータの研究開発               
    Jan. 2017 - Dec. 2017
  • 世界最小を目指した小児用人工心臓用5軸制御磁気浮上モータの超小型化に関する研究               
    Others
    Aug. 2014 - Mar. 2016
  • 乳児から成長期に対応した小児用磁気浮上人工心臓の開発               
    フィージビリティスタディ(探索タイプ)
    Dec. 2014 - Dec. 2015
  • 世界最小の5軸制御磁気浮上モータを用いた小児用人工心臓の研究開発               
    カシオ科学振興財団 第32回研究助成
    Dec. 2014 - Dec. 2015
  • 超小型5軸制御磁気浮上モータを用いた乳幼児・小児用補助人工心臓の研究開発               
    日本人工臓器学会 Grant
    Oct. 2014 - Oct. 2015
  • 世界最小を目指した小児用人工心臓のための超小型ダブルステータ5軸制御磁気浮上モータの研究開発               
    第30回マツダ研究助成
    Sep. 2014 - Sep. 2015
  • 人工心臓用アキシャル型磁気浮上モータの小型化・高効率化に関する研究               
    特別研究員奨励費
    Apr. 2012 - Mar. 2014

Industrial Property Rights

  • 特願2025-35871, アキシャル型磁気浮上モータ
    長真啓, 増澤徹, 北山文矢, 小橋優輝
  • 特願2022-170142, 磁気制御変速機及びそれを用いた人工心臓
    増澤徹,長真啓,北山文矢
  • 特願2012-172943, アキシャル型磁気浮上モータ
    増澤徹,長真啓

Academic Contribution Activities

  • 機械学会バイオエンジニアリング部門若手委員               
    Planning etc
    01 Apr. 2023 - 31 Mar. 2025
  • 日本ライフサポート学会 編集委員               
    Planning etc
    01 Dec. 2023 - 31 Mar. 2024
  • 日本AEM学会 編集委員               
    Planning etc
    01 Aug. 2017 - 31 Mar. 2024