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6ES7392-1BM01-0AA0 永磁同步电机是由永磁体励磁产生同步旋转磁场的同步电机,永磁体作为转子产生旋转磁场,三相定子绕组在旋转磁场作用下通过电枢反应,感应三相对称电流。此时转子动能转化为电能,永磁同步电机作发电机(generator)用;此外,当定子侧通入三相对称电流,由于三相定子在空间位置上相差120,所以三相定子电流在空间中产生旋转磁场,转子旋转磁场中受到电磁力作用运动,此时电能转化为动能,永磁同步电机作电动机(motor)用。永磁同步电机可以将电机整体地安装在轮轴上,形成整体直驱系统,即一个轮轴就是一个驱动单元,省去了一个齿轮箱。永磁同步电机的特点主要有以下几种:(1)PMSM本身的功率效率高以及功率因数高;(2)PMSM发热小,因此电机冷却系统结构简单、体积小、噪声小;(3)系统采用全封闭结构,无传动齿轮磨损、无传动齿轮噪声,免润滑油、免维护;(4)PMSM允许的过载电流大,可靠性显著提高;(5)整个传动系统重量轻,簧下重量也比传统的轮轴传动的轻,单位重量的功率大;(6)由于没有齿轮箱,可对转向架系统随意设计:如柔式转向架、单轴转向架,使列车动力性能大大提高。
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