变频调速时,若保持电动机定子供电电压不变,仅改变其频率进行变频调速,将引起磁通的变化 发布时间:2019-02-18 16:44 │ 来源:www.tikuol.com 题型:判断题 问题: 变频调速时,若保持电动机定子供电电压不变,仅改变其频率进行变频调速,将引起磁通的变化,出现励磁不足或励磁过强的现象。
题型:判断题 The Oral Approach believes that language learning in real life is for the acquisition of spoken language while language learning in the classroom is for the ______ of literacy. 查看答案