【摘要】 针对某型号伺服驱动单元工作过程中IPM温升过高的问题,将数值仿真技术应用到伺服驱动单元散热器优化中。开展了散热器几何参数对IPM温升的影响分析,通过均匀设计和多项式拟合相结合的方法建立了关于散热器基板厚度、翅片数和翅片厚度的IPM温升二阶响应面模型,提出了一种基于响应面的散热器优化方法。利用方差分析和拟合优度检验对响应面模型的准确度进行了评价,并在CFD软件上对优化后的散热器方案进行了数值仿真试验。研究结果表明,二阶响应面模型的误差范围不超过2.88%,可以准确地拟合IPM温升与散热器几何参数之间的数学关系;在优化后的方案中IPM温升降低了5.48℃,有效地提高了设备的可靠性,为其他型号伺服驱动单元散热器及类似结构优化提供了参考。更多还原

【Abstract】 Aiming at reducing the IPM temperature rise of the servo drive unit during the operation process,the numerical simulation technique was investigated. After the analysis of the influence of the geometric parameters of heat sink on the IPM temperature rise,a second-order response surface model of the IPM temperature rise about the base height of the heat sink,number of fins and fin thickness was established by the combination of uniform design of experiments and polynomial fitting. A method was presented to optimize the heat sink based on the response surface. The accuracy of the model was evaluated by the analysis of variance and goodness of fit test,and the optimized scheme of the heat sink was tested by the numerical simulation in the CFD software. The results indicate that the error margin of the model is less than 2. 88% which means the mathematic relation between the IPM temperature rise and the geometric parameters of heat sink can be accurately fitted by the model,and in the optimized scheme,the IPM temperature rise is reduced by 5. 48 ℃,which can effectively increase the reliability of the products and provide reference for the optimization of the heat sinks in the servo drive units or other similar structures.更多还原