CAJ | 학술논문

在变频控制下的永磁同步电机谐波含量大、发热严重，且散热结构复杂。为研究其温升分布规律，该文以一台50 kW永磁同步电机为例，基于计算流体力学以及传热传质学基本理论，根据共轭传热原理，建立包含形状复杂的散热翅及接线盒等结构部件的三维流动与传热的物理模型。应用有限体积元法，对变频供电情况下的永磁同步驱动电机内各部件温升及流体流动进行了数值求解，并着重分析了电机内主要结构部件的温升空间分布特性。通过与实验数据的对比分析，验证了其计算结果的准确性以及求解方法的合理性，为中小型永磁同步驱动电机的设计提供一定的参考和实际工程价值。
재변빈공제하적영자동보전궤해파함량대、발열엄중，차산열결구복잡。위연구기온승분포규률，해문이일태50 kW영자동보전궤위례，기우계산류체역학이급전열전질학기본이론，근거공액전열원리，건립포함형상복잡적산열시급접선합등결구부건적삼유류동여전열적물리모형。응용유한체적원법，대변빈공전정황하적영자동보구동전궤내각부건온승급류체류동진행료수치구해，병착중분석료전궤내주요결구부건적온승공간분포특성。통과여실험수거적대비분석，험증료기계산결과적준학성이급구해방법적합이성，위중소형영자동보구동전궤적설계제공일정적삼고화실제공정개치。
The problems of harmonics and the heat of permanent magnet synchronous motors (PMSMs) are quite large when operating under the frequency conversion control system. The cooling structure of PMSM is usually complex. To research the temperature distribution of PMSM, a 50 kW surface PMSM was taken as a research object in this paper, based on the computational fluid dynamics (CFD) and the numerical heat transfer theory. A three dimensional fluid flow and heat transfer model including components such as the complex fins, and the connecting box was set up by using a liquid-solid conjugate heat transfer approach. Thus, the temperature and fluid field of PMSM, operating under frequency conversion control, was simulated numerically using the finite volume method, and the spatial temperature distributing characteristics of main components were analyzed. The correctness of the proposed model and the rationality of the solution method were verified by the thermal test of PMSM. This paper has a reference value and significant guideline for PMSM design.