摘要：设计了一种适合于婴幼儿患者应用的磁悬浮心室辅助装置，该装置和通常适用于成年患者的磁悬浮心室辅助装置相比，其器械体积要足够小，故设计了一种微型化轴向气隙磁悬浮电机，并提出采用p±2极算法实现径向位置控制，且通过磁场分析的方法验证了微型化轴向磁悬浮电机径向位置控制方法的可行性。在结构方面：提出的该双定子电机由结构相同的顶部定子与底部定子及一个位于定子中间的悬浮转子构成，其中，双定子结构可以大大减小电机的体积、增大气隙和转矩。在控制方面：转子的转速和轴向位移可由矢量控制方法实现其独立控制，而转子的倾斜量和径向位移可通过提出的
p±2极算法实现，由此表明所设计的电机外径为28 mm，高为41 mm的轴向气隙双定子电机可实现其在五个自由度上的完全控制。

关键词：磁悬浮电机； 心脏辅助装置； 双定子电机； 磁场分析
Abstract: Developed a maglev ventricular assist device (VAD) for use in infant patients, which requires the device to be smaller compared to adult devices. In this research, a miniaturized axial gap maglev motor for use as a pediatric VAD was reported. In addition, radial position control theory using p±2 pole algorithm was proposed, and the feasibility of radial position control with the miniaturized axial gap maglev motor was examined by using magnetic field analysis. In the aspect of structure: the double stator motor consists of a top stator, a bottom stator and a levitated rotor set between the stators which have an identical structure. A double stator mechanism was adopted to enhance motor torque with a smaller device size and a large air-gap. In the aspect of control: the rotational speed and the axial position of the rotor are regulated independently based on a vector control algorithm; The inclination and the radial position of the rotor are regulated using p±2 pole algorithm; The designed motor which has an outer diameter of 28 mm and total height of 41 mm can produce a radial force using p±2 pole algorithm, and indicates a possibility of 5 degrees of freedom (DOF) controlled axial gap double stator motor.

Key words: maglev motor, ventricular assist device, double stator motor, magnetic field analysis