【目的】为满足IE5国际最高能效等级标准要求，并应对永磁电机成本高、异步电机实现IE5能效等级材料用量大以及纯磁阻电机功率因数低等问题，本研究开发了兼具高效率、高功率因数及低成本优势的永磁辅助式同步磁阻电机(PMASRM)系列产品。【方法】首先，系统研究了电机极数、气隙长度、磁障层数、磁障比和转子肋宽等关键参数对转矩、效率以及功率因数等电磁性能的影响规律。然后，采用有限元法进行了参数优化设计与矩角特性仿真，确定了最佳电流控制角，并对转子隔磁桥进行了电磁-结构耦合强度分析以确保机械可靠性。最后，完成了6个规格9台样机的试制与测试。【结果】样机效率全部达到IE5能效等级，功率因数普遍高于行业标准要求。成本分析结果表明，在相同输出功率下，该系列电机的有效材料总成本低于IE4能效等级异步电机和永磁电机，成本优势尤为显著。【结论】本研究开发的PMASRM系列产品成功实现了IE5能效目标，并在多数常用转速点展现出优异的性价比，兼具节能与节材特性，市场潜力广阔，为我国电机行业提升国际竞争力提供了有力支撑。

[Objective] To meet the requirements of the IE5 international maximum energy efficiency class and address the issues of high cost in permanent magnet motors, excessive material consumption in asynchronous motors for achieving IE5 efficiency class, and low power factor in pure reluctance motors, this study developed a series of permanent magnet assisted synchronous reluctance motor (PMASRM) featuring high efficiency, high power factor, and low cost. [Methods] Firstly, the influences of key parameters, including the number of motor poles, air gap length, the number of flux barrier layers, flux barrier ratio, and rotor rib width, on electromagnetic performance such as torque, efficiency, and power factor were systematically investigated. Then, the finite element method was employed for parameter optimization design and torque-angle characteristic simulation, through which the optimal current control angle was determined. Moreover, an electromagnetic-structural coupled strength analysis was conducted on the rotor flux barrier bridge to guarantee mechanical reliability. Finally, the trial production and testing of nine prototypes across six specifications were completed. [Results] All prototypes achieved the IE5 energy efficiency class, and their power factors generally exceeded the requirements of industrial standards. Cost analysis results demonstrated that, at the same output power, the total cost of active materials for this series of motors was lower than that of IE4 efficiency class induction motors and permanent magnet motors, showing a particularly significant cost advantage. [Conclusion] The series of PMASRM developed in this study have successfully achieved the IE5 energy efficiency target. They demonstrate outstanding cost-performance ratio across most commonly used speed points, integrating both energy-saving and material-saving characteristics. With substantial market potential, the proposed motor series provides robust technical support for enhancing the international competitiveness of China’s motor industry.