【摘要】 针对永磁同步电机设计、参数优化和热分析等问题,对永磁同步电机的热路法温度计算进行了研究,建立了考虑安装和冷却方式的热路模型,提出了一种热路关键参数的测试方法,测试了机壳与空气间的等效热阻、端盖与空气间的等效热阻、安装板与空气间等效热阻,绕组与定子铁芯之间的等效热传导系数,机壳与定子铁芯之间的等效空气隙厚度、端盖与机壳间的等效空气隙厚度、安装板与端盖之间的等效空气隙厚度等热路参数。同时对热路模型进行了热阻敏感性分析,得到了影响电机温升的主要热路参数。实验结果表明,该热路模型和实验测试数据,可以较准确地计算电机温升,误差在5%以内。该热路模型和实验测试热路参数可为同类型电机的设计以及热分析提供很好的参考。更多还原

【Abstract】 Aiming at calculate the temperature of permanent magnet synchronous motors( PMSM) rapidly,lumped-parameter thermal model of PMSM was analyzed. A lumped-parameter thermal model including the mounting plate was established to predict the temperature rise for PMSM. With dc test method proposed in this paper,these thermal parameters were tested: the equivalent thermal resistance between housing and ambient,the equivalent thermal resistance between end caps and ambient,the equivalent thermal resistance between mounting plate and ambient; the equivalent thermal conductivity between winding and lamination; the interface gap between housing and lamination,the interface gap between end caps and housing,and the interface gap between mounting plate and end caps. The sensitivity of thermal parameters was studied to identify the key part which will influence the thermal performance. The steady performance of the thermal model was validated by experiments on a test motor. The results indicate that the thermal model and tested parameters can calculate the temperature of motors accurately,with only 5% error.更多还原