【判断题】【消耗次数:1】
交流同步发电机转子的转速n与定子旋转磁场的转数n。的关系是nn0。
正确
错误
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相关题目
【判断题】 异步电动机的转子转速n总是略大于旋转磁场的同步转速n1,即旋转磁场“异步”的转动,所以称这种电动机为异步电动机。
①  正确
②  错误
【判断题】 旋转磁场的转速,即同步转速(n1)和电源频率(f1)及磁极对数(p)有关吗?
①  正确
②  错误
【单选题】 交流发电机转子作用是( )。
①  发出三相交流电动势
②  产生磁场
③  变交流为直流
【单选题】 交流发电机中产生磁场的装置是( )。
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②  转子
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【判断题】 交流发电机中性点N输出电压为发电机电压的一半。()
①  正确
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【单选题】 改变异步电动机定子绕组的极对数P,以改变定子旋转磁场的转速n1,即()。
①  转差率
②  所谓变极调速
【判断题】 交流发电机中性点N的输出电压为发电机电压的一半。()
①  正确
②  错误
【单选题】 同步电机的转子磁场是( )。
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【判断题】 三相异步电机中转子绕组产生旋转磁场。
①  正确
②  错误
【单选题】 三相异步电动机转子的转速( )旋转磁场的转速。
①  低于
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