2018年8月28日～31日の間，東京農工大学にて，機械学会機械力学・計測制御部門講演会のDynamics and Design Conference (D&D) が開催され，研究成果を発表しました．農工大には自動織機の展示館があり，大変興味深かったです．
タイトル：磁気浮上遠心ポンプ用ワイドギャップ磁気軸受の設計と制御
内容：インペラロータが磁気浮上しながら回転する遠心ポンプ用の磁気軸受を新たに設計，試作し，磁気浮上試験を行った．回転子鉄心表面と固定子鉄心表面間の距離（磁気的なギャップ）が7mmというのが特徴である．また，固定子の発熱を防ぐのに，ゼロバイアス電流制御を適用している．
Abstract: This paper presents a radial magnetic bearing with a wide air-gap for improving durability and reducing contamination of a centrifugal blood pump with a disposable pump head. The rotor is magnetically suspended by the radial magnetic bearing and driven by an external motor through a permanent magnetic coupling. The pump housing where an impeller-rotor is encapsulated should be as thick as possible in terms of mechanical strength. Hence, an air-gap between surfaces of the rotor and the stator is designed to be wide. The wide air-gap, however, may cause a reduction in suspension force and torque. This paper considers design and control of a radial magnetic bearing that has wide air-gap of 7 mm for a disposable blood pump application.
