中文摘要：

基于人工心脏的要求和应用，提出一种新的容错型圆筒式永磁电动机。该电机的最大特点是两相饼状绕组及轴向充磁的永磁体位于定子上，动子仅由多齿的铁心组成。为了提高电机性能，通过有限元方法（FEM）对动子齿宽、永磁体宽、容错齿宽、定子内径和动子外径比等主要尺寸进行优化，得到同时满足定位力和反电动势要求的尺寸。此外，比较了优化前后电机性能。最后仿真结果表明，该优化方法能够快速有效地改善电机性能。

英文摘要：

Based on the requirements and the application of the artificial heart （AH）, a new fault-tolerant tubular permanent-magnet （FTTPM） motor was proposed. The stator of the proposed motor was evidently characterized by two phase pie-windings, axial-magnetized permanent magnets and its mover only with multi-tooth core. In order to improve the motor performance, the key was that major parameters, such as the mover tooth width, the permanent magnets width, fault-tolerance tooth width, the split ratio, and so on ,were optimized to meet both the cogging force and back-EMF requirements by the finite element method （FEM）. Besides, the motor performance was compared before and after the optimization. Finally, the simulation results show that the optimization method is able to quickly and efficiently improve motor performance.