【判断题】【消耗次数：1】
异步电动机工作于电动机状态时，转子绕组中的电流是高于定子电流的频率的交流。
①
正确
②
错误
参考答案：
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相关题目
【单选题】
三相异步电动机带载工作时，其转子绕组上?电流。
①
A．由于无外部电源给转子供电，故无电流
②
B．由于有外部电源给转子供电，故有电流
③
C．由于无电磁感应，故无电流
④
D．由于有电磁感应，故有电流
【单选题】
矢量控制实现的基本原理是通过测量和控制异步电动机定子电流矢量，根据磁场定向原理分别对异步电动机的励磁电流和转矩电流进行控制，从而达到控制异步电动机转矩的目的。
①
正确
②
错误
随机题目
【单选题】
Everyone of them _______ tired and wanted a good rest.
①
seems
②
is seemed
③
was seemed
④
seemed
【单选题】
Peter: How about going to the movies tonight then?Mary: ____
①
I don’t know.
②
The movie is very interesting.
③
That sounds good.
④
The movie is very boring.
【单选题】
John was going to _______ Mary by telling his friends how much weight she had gained.
①
essential
②
embarrass
③
elementary
④
consider
【单选题】
The classroom is quite clean ____ some waste paper on the floor.
①
without
②
besides
③
except
④
except for
【单选题】
All the men were under heavy____ working day and night
①
prize
②
rain
③
pressure
④
reward
【单选题】
—I’ve got an offer in New York. —Oh, ____! But I’m going to miss you.
①
That’s too bad
②
I’m sorry
③
I beg your pardon
④
That’s great
【单选题】
The ____child was learning to walk again gradually.
①
broken
②
harmed
③
injured
④
enable
【单选题】
You never told us why you were one hour late for the last meeting, ____?
①
weren’t you
②
didn’t you
③
have you
④
did you
【单选题】
Rapid reading means reading something fast just to ____ the general idea.
①
master
②
seize
③
grasp
④
imagine