平流层电动机控制器热特性仿真分析和实验

为得到某电动机控制器在平流层低温低气压环境下工作时的热特性,开展了基于软件Icepak的热仿真分析,并通过地面环境模拟实验和平流层飞行实验对仿真模型进行了验证,仿真结果与实验结果基本吻合。结果表明:控制器的热设计可以满足保温和散热要求;在平流层低气压条件下,内部风扇可有效地保持控制器内部温度的均衡;平流层高度的太阳辐射对控制器内部温度分布有较大影响,在进行热设计时应予以考虑。研究结果为平流层电动机控制器的工程应用提供重要的参考依据。 

Simulation analysis and test on thermal performances of stratospheric motor controller

To obtain the thermal performances of a motor controller working in stratosphere, numerical simulation based on software Icepak was performed. To confirm the accuracy of the numerical model, aground environmental simulation test and a stratospheric flight test were carried out. Results showed that the numerical model equation can simulate the thermal performance of the controller well. The influences of the cooling method of forced convection using an inner fan on the thermal performances were researched. The numerical simulation and flight test results showed that the thermal design of the controller was acceptable in view of stable working. Surface solar radiation should be taken into account, as it will influence the internal temperature. The research results provide important references for the engineering application of the stratospheric motor controller.