发布时间:2025-01-20 20:59:43
【答案】:三相交流异步电动机的调速方法有三种:(1)变极调速:改变定子绕组磁极数;(2)变频调速,改变电动机电源频率;(3)改变电动机转差率调速;改变串接在转子电路内的电阻(此种方法适用于三相绕线式电动机使用)。
太原铁路贴吧山西大同湖东电力机务段段长张喜平平均长工资及各项平均奖划分等级领导等级最高
2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43 2025-01-20 20:59:43