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Model of Air Cooled Windings for Traction Machine

机译：用于牵引机的空气冷却绕组模型

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This article presents a concept of direct cooled windings for electrical machines, pumping air through hollow rectangular copper windings. The thermal constraints pose a serious limitation in the performance of many applications of electrical machines, not least in electrical vehicles. The difference between temporary maximum output and continuous output is often substantial. This difference can be decreased with effective cooling methods, such as direct cooling of the windings. The concept of direct cooled windings are modeled in a empirical-lumped parameter model. The model is described in the article and experimentally validated through experiments. Finally the results of the model regarding optimized dimensions for electrical machines are presented and discussed. The results show that a current density of 16 A/mm2 (insulation and cooling channels accounted for) can be achieved. 18 A/mm2 is achievable with other dimensions, but with lower efficiency. The pump power for the coolant air is similar in magnitude to the amount of resistive losses.
机译：本文介绍了电机直接冷却绕组的概念，通过中空矩形铜绕组泵送空气。热约束对电机许多应用的性能进行了严重限制，尤其是在电动车辆中的性能。临时最大输出和连续输出之间的差异通常很大。通过有效的冷却方法可以减少这种差异，例如绕组的直接冷却。直接冷却绕组的概念在经验集的参数模型中建模。该模型在文章中描述并通过实验进行了实验验证。最后提出和讨论了关于电机优化尺寸的模型的结果。结果表明，电流密度为16A / mm 2 （可以实现占用的绝缘和冷却通道）。 18 a / mm 2 可实现其他尺寸，但效率较低。冷却气体空气的泵功率幅度相似至电阻损耗的量。

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