外笼型转子磁力耦合器温度场分析

针对现有笼型转子散热条件差，永磁体易退磁等缺点，提出一种外笼型转子磁力耦合器（OSRMC）。基于OSRMC组成结构及运行原理，给出其热分析模型及损耗原理，并依此论证了OSRMC在转差为33.3%时，其所产生的热功耗最大（为4/27倍的额定功率）。基于传热学原理，给出了OSRMC两种主要的热量交换方式及导热微分方程，并基于集群解析法与区域剖分法得到了OSRMC的有限元法仿真结果。结果表明：OSRMC的主要换热方式为热对流，其主要温升位于笼条与永磁体的耦合处并沿轴向逐渐降低；集群解析法与区域剖分法计算精度相当，但区域剖分法计算速度较快，网格划分难度较大。

Analysis of Temperature Field of Outer Cage Rotor Magnetic Coupler

Aiming at the disadvantages of poor heat dissipation condition of cage rotor and easy demagnetization of permanent magnet, an outer squirrel cage rotor magnetic coupler (OSRMC) is proposed. Based on the composition and operation principle of OSRMC, the thermal analysis model and loss principle are given, and it is demonstrated that when the slip of OSRMC is 33.3%, the generated thermal power consumption is the maximum (4/27 times of the rated power). Based on the principle of heat transfer, the two main heat exchange modes and the differential equation of heat conduction of OSRMC are given, and the finite element simulation results of OSRMC are obtained based on the cluster analysis method and the domain partitioning method. The results show that: the main heat exchange mode of OSRMC is thermal convection, and its main temperature rise is located at the coupling between the cage and the permanent magnet and gradually decreases along the axial direction. The calculation accuracy of cluster analysis method is equivalent to that of area division method, but the calculation speed of area division method is fast and the grid division is more difficult.