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Model of Air Cooled Windings for Traction Machine

机译：牵引机风冷绕组模型

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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：本文提出了一种用于电机的直接冷却绕组的概念，该绕组通过空心矩形铜绕组泵送空气。热约束严重限制了电机的许多应用的性能，尤其是在电动汽车中。临时最大输出和连续输出之间的差异通常很大。利用有效的冷却方法，例如直接冷却绕组，可以减小这种差异。直接冷却绕组的概念以经验集总参数模型建模。该模型已在本文中进行了描述，并通过实验进行了实验验证。最后，介绍并讨论了有关电机优化尺寸的模型结果。结果表明，电流密度为16 A / mm 2 （绝缘和冷却通道占）可以实现。 18 A /毫米 2 其他尺寸可以实现，但效率较低。冷却剂空气的泵浦功率在大小上与电阻损耗量相似。

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