2019 Volume 27 Issue 1 Pages 55-60
Compact mechanical circulatory support (MCS) devices, such as continuous flow rotary blood pumps, have been clinically demanded for pediatric heart treatment. In this research, a miniaturized 5-degrees of freedom (DOF) con-trolled double stator maglev motor is undergoing development for use in pediatric MCS devices which have high du-rability and better blood compatibility. This paper reported improvement of the 5-DOF controlled maglev motor by modifying the magnetic circuit to enhance magnetic suspension performance and energy efficiency. The static sus-pension characteristics and energy efficiency of the developed motor with modified magnetic circuit were then inves-tigated. The axial suspension force and the inclination torque were increased by more than 45%. The input power was reduced by 1-5 W, and the motor efficiency increased by 5-8%. The significantly improved suspension force and energy efficiency due to design refinement indicated feasibility of high performance next generation pediatric MCS device.
