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三相异步电动机的定子绕组是一个()位置对称的()绕组,如果其中通入()对称的交流电流,可建立一个()磁场。 2. 转子转速 n 恒()旋转磁场的转速 n1 ,这种电动机称为异步电动机, n1 称为(),转速 n1 与 n 的差称为() 3. 异步电动机旋转磁场的转速 n 与电源的频率成()比,与磁极对数成()比。
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