单相异步电动机在单相电源供电的场所有广泛且不可替代的应用，不过单相异步电动机也存在效率及功率因数低、材料用量大、振动噪声大等突出问题。以提高电动机的能效为主要目标开展了双值电容单相异步电动机设计研究，分析了电动机的工作原理。以YL801-2型电动机为例，根据机座号选用定转子冲片，对定子绕组和定转子的槽型尺寸进行了方案选择和效率的优化设计。通过场路耦合有限元方法计算了额定工况和启动工况下的输入电流、输出转矩、效率、堵转转矩/堵转电流等性能指标，结果表明该电动机的各项指标达到了GB 18613—2020二级能效要求和JB/T 7588—2010的技术条件要求，该设计对进一步提高单相异步电动机的能效有一定的借鉴作用。

Single-phase asynchronous motor is widely and irreplaceable in the place of single-phase power supply. However, the single-phase asynchronous motor also has some problems, such as low efficiency and power factor, large amount of materials, large vibration and noise. The design and research of double capacitance single-phase asynchronous motor is carried out to improve the energy efficiency, and the working principle of the motor is analyzed. Taking YL801-2 motor as an example, the stator and rotor punching plates are selected according to the frame number, and the scheme selection and efficiency optimization design are carried out for the stator winding and slot size. The input current, output torque, efficiency, locked torque/locked current and other performance of indicators under rated and starting conditions are calculated by field circuit coupling finite element method. The results show that the performance reach the level II energy efficiency requirements of GB 18613—2020 and the technical requirements of JB/T 7588—2010. The design can be used for references to further improve the energy efficiency of single-phase asynchronous motors.