产品6ES7998-8XC01-8YE2

6ES7998-8XC01-8YE2

通过空心电机轴间接油冷效果更佳。油冷根据是否对内部电磁线绕组等部分进行冷却，可以分为直接油冷和间接油冷。直接油冷有浸油和喷油式两类，浸油式即利用油的绝缘特性，直接将油通入电机内部，浸没定转子，这种方法能有效增强电机内部的传热系数，但浸油式会使转子在运行过程中与油发生摩擦，降低电机效率；喷油式是利用油泵将变压器油喷到转子上设计的固定叶片，通过叶片的旋转作用，将变压器油飞溅到电机定子绕组端部等部件进行冷却。而间接油冷则是冷却油通过空心电机轴和电机外壳体进行循环散热，可直接去除电机内部热量，并且与转子摩擦损耗较小，优势较为明显。 

驱动电机扁线化

高功率的需求以及规模效应的到来，使得扁线电机将成为行业主流。以往驱动电机电磁线绝大多数均为圆铜线，由于圆线精度要求等各方面要求相对较低，且小批量的时候可以使用人工，所以经济性相对较好。随着新能源汽车时代的到来，电机正逐步走向高功率、高转速，对于电机的工作效率要求越来越高，因此扁线电机正在成为行业主流，2021 年扁线电机渗透率已经达到 27%，后续随着电机行业规模效应的进一步提升，扁线电机将会持续快速渗透。

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