针对单向耦合法分析屏蔽式永磁同步电机电磁场和温度场时计算精度低的问题，提出了一种磁热双向耦合法。首先，建立了磁热耦合计算模型。其次，采用双向耦合法分析了屏蔽套材料对电机性能的影响，并与单向耦合计算结果进行了比较。最后，建立了电机三维模型，利用有限元软件进行了电磁场和三维温度场分析。研究结果表明所提的磁热双向耦合计算方法可以有效提高电磁场和温度场的计算精度，此外屏蔽套采用不导电不导磁材料可有效提高屏蔽式永磁同步电机效率，降低电机温升。这不仅为屏蔽式永磁同步电机的设计提供了参考，同时对于保证电机高效和可靠运行具有重要意义。

Aiming at the problem of low computational accuracy when analyzing the electromagnetic field and temperature field of canned permanent magnet synchronous motor by the directional coupling method, a magneto-thermal bidirectional coupling method is proposed. Firstly, a magneto-thermal coupling computational model is established. Secondly, the influence of the can sleeve material on the motor performance is analyzed by the magneto-thermal bi-directional coupling method, and the calculation results are compared with the directional coupling method. Finally, a three-dimensional model of the motor is established and the electromagnetic field and three-dimensional temperature field are analyzed using finite element software. The results show that the proposed magneto-thermal bi-directional coupling calculation method can effectively improve the calculation accuracy of electromagnetic field and temperature field. In addition, the can sleeve using non-conductive non-magnetic materials can effectively improve the efficiency of the canned permanent magnet synchronous motor and reduce the temperature rise of the motor. The proposed method not only provides a reference for the design of canned permanent magnet synchronous motor, but also is of great significance to ensure the efficient and reliable operation of the motor.

辽宁省教育厅项目(LJKZ1020)