永磁同步电主轴内部流场与温度场耦合分析

Coupling analysis of internal flow field and temperature field of permanent magnet synchronous motorized spindle

永磁同步电主轴内部温度过高是影响其正常工作的主要因素之一。本文以某种型号的永磁同步电主轴为研究对象,分析了电主轴内部的空气流动对其温升的影响。基于UG软件对该电主轴内部气隙和包括端部绕组在内的端部进行建模,并基于ICEM软件对模型进行了网格划分。在一定的假设和边界条件下,采用ANSYS/FLUENT对其内部的流场和温度场进行了耦合计算,得到了该电主轴内部的温度和流速分布。分析结果表明:永磁同步电主轴内部空气流速对电主轴内的温升有一定影响;电主轴气隙内侧凹槽的旋转,可以有效地扰动端部空气,从而增加了绕组散热。

Over heating of Permanent Magnet Synchronous Motorized Spindle（PMSMS）is one of the main fac- tors that affect the normal operation. This paper selected a certain type of PMSMS as the research object, the influence of air flow in PMSMS on its internal temperature rise was analyzed. The internal air gap and end wind- ing of the motorized spindle were modelled by the UG software. The model was meshed by the ICEM software. Under certain assumptions and boundary conditions, the flow field and temperature field were calculated using ANSYS/FLUENT. The temperature distribution and velocity distribution of the motorized spindle were ob- tained. The analysis results show that the air flow in the PMSMS has a certain influence on the temperature rise of the motorized spindle. Rotation of the groove on rotor surface in the air gap of the motorized spindle can ef- fectively disturb the air in winding end. Thereby, the heat dissipation of the winding is increased.