自动门
自动门:异步电动机的功率及转矩
发布时间:2013/11/2
异步电动机的功率及转矩
    由异步电动机的等效电路可以清楚地看到,三相异步电动机的功率传递过程是:由定
子向电源吸取电功率,经电磁感应传递到转子,称为电磁功率,该功率使转子产生电磁转
矩,从而转换成机械功率,带动负载旋转。
    (1)异步电动机的功率传递。
    异步电动机在功率传递的过程中,不可避免地会有功率损耗,可用图11. 39来表示三
相异步电动机的功率流程。
   
    2)电磁转矩的表达式。
    a.电磁转矩基本公式。
    
    b.电磁转矩的物理表达式。
   
    c.电磁转矩的参数表达式。
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