科学研究費助成事業　　研究成果報告書

様　式　Ｃ－１９、Ｆ－１９－１、Ｚ－１９ （共通）

機関番号：

研究種目：

課題番号：

研究課題名（和文）

研究代表者

研究課題名（英文）

交付決定額（研究期間全体）：（直接経費）

１２３０１

若手研究(B)

2016～2014

ダブルステータ型アキシャル磁気浮上モータを用いた両心室補助人工心臓

Bi-ventricular assist device using double-side stator type axial magnetic levitation motor

６０４３５４９３研究者番号：

栗田　伸幸（Kurita, Nobuyuki）

群馬大学・大学院理工学府・准教授

研究期間：

２６８２００７１

平成 年 月 日現在２９ ６ １５

円 3,100,000

研究成果の概要（和文）：ダブルステータ型アキシャル磁気浮上モータの開発と，開発したモータを用いた遠心型血液ポンプの開発を行った。まず，提案する磁気浮上モータの開発を行い，開発した磁気浮上モータが人工心臓に適用可能な性能を有することを明らかにした。次に，両心室補助人工心臓ポンプの開発に取り組み，開発した磁気浮上モータをベースに，ポンプ全体の設計と製作を行った。そして，製作した磁気浮上ポンプが，揚程 100 mmHgのとき，流量 5.8 L/min（回転数1800 r/min）の流量特性を有することを確認した。これにより，製作した磁気浮上ポンプが両心室補助可能なポンプ性能を有することを明らかにした。

研究成果の概要（英文）：We have developed a double stator type axial magnetic levitation motor and developed a centrifugal type blood pump using the developed motor. Firstly, we developed the proposed magnetic levitation motor and clarified that the magnetic levitation motor has the performance applicable to the ventricular assist device. Next, we developed bi-ventricular assist artificial heart pumps. The prototype was designed and fabricated based on the magnetic levitation motor. Then, we confirmed that the produced magnetic levitation pump had a flow rate of 5.8 L/min and a head of 100 mmHg (rotation number 1800 r/min). As a result, we clarified that the magnetic levitation pump produced has pumping capability that can support both ventricles.

研究分野： メカトロニクス

キーワード： 磁気浮上モータ　磁気ベアリング　人工心臓　心室補助装置

２版

[1] (Ventricular Assist Device: VAD)

30%[2]

[1] Mark S. Slaughter, Joseph G. Rogers, et. al.,

“Advanced Heart Failure Treated with Continuous Flow Left Ventricular Assist Device”, N Engl J Med, Vol. 361, No. 23, pp. 2241-2251 (2009).

[2] Evgenji V. Potapov, Antonio Loforte, Yuguo Weng, et. al., “Experience with over 1,000 implanted Ventricular Assist Devices”, J Card Surg, Vol. 23, No. 3, pp. 185-194 (2008)

1

1

28

3 CAD

RVAD LVAD

Upperstator

Lowerstator

Coil

Permanentmagnet

1:

1

f 67 mm 67 mm

3 mm 2

12 2A: 3 8 B: 2 6

38

Rotor Outer diameter (Rotor disk, PM) f 45 mm Inner diameter (Rotor disk, PM) f 27 mm Rotor disk thickness 2 mm PM thickness 1 mm PM grade N48H Sensor target outer diameter f 67 mm Sensor target inner diameter f 50 mm

Stator Stator outer diameter f 45 mm Stator inner diameter f 27 mm Stator pole height 16 mm Stator base height 3 mm Number of winding A 50 turns/pole Number of winding B 100 turns/pole

Statorpole

Winding

2:

Sensortarget

PM formagneticfield

Rotorcore

Flow path

3:

PM forencoder

PM formagneticfield

Flow path

4:

5:

Casing

Rotor PM

Partitionplate

Impeller

Inlet

Lower stator

Upper stator

Outlet

Outlet

Rotor yoke

Inlet 6:

4 f 3 mm Hall IC

5

3D

6

78

5 %0.01 sec

0 min 1

4800 min 1

−0.01 0 0.01 0.02 0.03 0.04−0.05

0

0.05

0.1

0.15

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0

0.1

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Time (sec)

Dis

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t z (

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Flow rate (l/min)

Pum

p he

ad (m

mH

g)1200 min−11400 min−11600 min−11800 min−1

9:

1200 min−1 1400 min−1 1600min−1 1800 min−1

9170 mmHg 8.3 ℓ/min 1800 min−1

100 mmHg5.7ℓ/min 1800 min−1

5ℓ/min, 100 mmHg

4 1. Nobuyuki Kurita, Takeo Ishikawa, Naoki

Saito, Toru Masuzawa, “A double sided stator type axial self-bearing motor development for left ventricular assist devices,” International Journal of Applied Electromagnetics and Mechanics Vol. 52, pp. 199-206 (2016)

2. Takeo Ishikawa, Shota Mizuno, Nobuyuki

Kurita, “Characteristics of a Permanent Magnet Synchronous Machine Designed by a Topology Optimization Method,” Materials Science Forum, Vol. 856, pp 172-177 (2016)

3. Nobuyuki Kurita, Takeo Ishikawa, Genri

Suzuki, “Development of the two-pole type shaded pole self-bearing motor,” Materials Science Forum, Vol. 856, pp 196-201 (2016)

4. Nobuyuki Kurita, Takeo Ishikawa, Hiromu

Takada, Genri Suzuki, “Proposal of a Permanent Magnet Hybrid-type Axial Magnetically Levitated Motor,” IEEJ Journal of Industry Applications, Vol. 4, No. 4 p. 339-345 (2015)

9 1. Nobuyuki Kurita, Takeo Ishikawa, Naoki

Saito, Toru Masuzawa, “Basic design of the maglev pump for total artificial heart by using double stator type axial self-bearing motor,” Proceedings of the 15th ISMB, pp. 509-514 (2016)

2. Nobuyuki Kurita, Jun Mohara, Takeo Ishikawa, Naoki Saito, “A magnetically levitated left ventricular assist device,”

Proceedings of the 2nd International symposium of Gunma University Medical Innovation, Paper No. P20 (2015)

3. Nobuyuki Kurita, Takeo Ishikawa, Naoki Saito, Toru Masuzawa, “A Double side Stator type Axial Self-bearing Motor Development for the Left Ventricular Assist Device,” Proceedings of The 17th ISAEM, Paper No. 1P2-A-3 (2015)

4. Nobuyuki Kurita, Takeio Ishikawa, Genri Suzuki, “Proposal of the two-pole type shaded pole self-bearing motor,” Proceedings of JAPMED'9, pp. 77-78 (2015) 5

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