以高性能电机为核心的全电推进系统是临近空间飞行器关键技术之一。我国临近空间环境下使用的推进电机系统研究刚刚起步，基础理论体系不完善，亟待解决。本项目面向临近空间全电推进系统实际应用的背景需求，开展兼具高效率、高功率密度、容错能力的双边Halbach阵列无槽无铁芯永磁同步电机系统的基础理论与试验研究。建立该类电机系统的功率-效率-功率密度耦合关系模型，完善临近空间环境下电机系统多目标平衡优化设计理论。探索SiC器件在大功率电机推进系统中的应用方法，形成此类电机系统优化设计方法和加工工艺。掌握临近空间环境下电机系统生热-传热-散热规律，建立准确的临近空间环境下电机温升计算模型，优化设计临空环境下电机系统的强化散热结构。研制系统样机并进行性能测试，最终形成宽高效率区运行的电机-螺旋桨推进系统设计与控制方法，为全电推进系统在临近空间飞行器的工程应用提供必要的理论与技术支撑。

The full-electric propulsion system with high performance motor is one of the key technologies of near space aircraft. The research on the propulsion motor system used in the near space environment has just started in China, and the basic theory system is not perfect, which needs to be solved urgently. For the application in near space electric propulsion system, this project would carry out the research on the basic theory of double-sided Halbach array slotless ironless permanent magnet synchronous motor system with high efficiency, high power density, and fault-tolerant ability. The power-efficiency-power density coupling relation model of the motor system would be established, and the multi-objective optimization design theory of the motor system in the near space environment could be improved. The application method of SiC device in large power motor propulsion system would be explored. The optimum design method and process technology of this kind of motor system would be formed. Study on the heat transfer- dissipation law of motors under near space environment and complete the intensive cooling structure design of motor system under the environment. Develop system prototype and conduct performance test. Finally, the design and control method of the motor-propeller propulsion system with wide-high efficiency is formed, which provides the necessary theoretical and technical support for the application of the full electric propulsion system in the near space vehicle.