小型遠心血液ポンプ用１自由度制御型磁気軸受モータの研究

抄録

We applied an axial flux motor to the one-degree-of-freedom controlled magnetic bearing (MB) which we had proposed and designed for centrifugal blood pumps. The axial flux motor, which has little effect on the stiffness of the magnetic bearing, consists of Halbach permanent magnet arrays in the rotor and coreless motor coils in the stators. An experimental rotor, which was 52mm in diameter 18.5mm in height and 0.14kg in weight, could levitate stably. The rotor could rotate at a rotational speed of up to 3,000rpm when the bearing and motor gaps were filled with the glycerin fluid whose density and viscosity were as same as human blood at room temperature.