基于集总参数热网络法的永磁同步电机启动及稳态温升分析

Starting and steady temperature rise investigation for permanent magnet synchronous motor based on lumped-parameter thermal-network

为了实现对永磁同步电机稳瞬态温度场的快速精准求解,在对电机内热问题分析方法优缺点充分剖析的基础上,以一台表贴式永磁同步电机为例,依据集总参数热网络法基本原理,并对电机结构件进行合理等效后,构建了电机全域热网络模型,采用集总参数热网络法对电机内温度场进行了数值求解。采用实验测试结果以及有限体积元法计算结果对本算法进行准确性验证,分别对电机启动及稳定状态下不同结构件的温升时空分布特征进行了详细分析。揭示了该类电机稳瞬态温升分布规律,为电机状态监测以及性能分析与优化提供借鉴。

In order to solve the steady and transient temperature field of permanent magnet synchronous fast and accurately,a surface permanent magnet synchronous motor(SPMSM)was taken as an example,the model of whole domain heat network was established and the temperature field was solved by lumped-parameter thermal-network(LPTN)according to the principle of lumped parameter thermal network method based on analyzing the advantages and disadvantages of the thermal analysis methods for electric machines and reasonable equivalence the motor structural parts.The accuracy of the LPTN was verified by using the experimental test results and the calculation results of finite volume element method,and then the starting and steady temperature rise time and space distribution characteristic of different structure parts of the SPMSM were analyzed respectively in detail.The distribution law of steady and transient temperature rise for the electric machine is revealed,by which the references for the state monitoring,performance analysis and optimization of electric machine were provided.