【摘要】 为探究小功率车载逆变器的散热性能,利用CFD软件对车载逆变器建立有限元三维模型,用笛卡尔网格划分系统对重点部位进行网格加密处理,通过在不同工况下的数值仿真计算,得出逆变器整体及各个元器件的发热情况。在数值仿真结果的基础上,设计相关实验,在不同环境温度的工作条件下,对车载逆变器中各个元器件的工作温度进行实验测试。测试表明各个元器件在不同环境温度、外部负载的工况下,工作温度都控制在100℃左右,分析实验值与模拟值的误差,其最大误差在3.4%以内。数值仿真计算结果有较高的精确度。更多还原

【Abstract】 In order to explore the cooling performance of small power car inverter,a finite element 3D model was developed based on CFD simulation software. Then the heating situations of the whole and individual components of the inverter had been obtained through the numerical simulation calculation under different working conditions. On the basis of the numerical simulation results,the related experiments had been done under the same specifications of the numerical simulation. The test results showed the thermal characteristics of the components and the working temperature of the components was controlled around 100℃. Furthermore,the comparison between the experimental and numerical results showed that a quite accurate result could be received through the CFD simulation. The deviation from the experimental results was within 3. 4%. Numerical simulation had high accuracy.更多还原