p.p1%2520%257Bmargin%253A%25200.0px%25200.0px%25200.0px%25200.0px%253B%2520text-align%253A%2520justify%253B%2520font%253A%252010.5px%2520Helvetica%257D%250Aspan.s1%2520%257Bfont%253A%252010.5px%2520%2526%252339%253BTimes%2520New%2520Roman%2526%252339%253B%257D 一台 2 极绕线式异步电动机,如果要把转速调上去,可以采用的调速方法是( )。
A.
p.p1%2520%257Bmargin%253A%25200.0px%25200.0px%25200.0px%25200.0px%253B%2520text-align%253A%2520justify%253B%2520font%253A%252010.5px%2520Helvetica%257D 变极调速;
B.
p.p1%2520%257Bmargin%253A%25200.0px%25200.0px%25200.0px%25200.0px%253B%2520text-align%253A%2520justify%253B%2520font%253A%252010.5px%2520Helvetica%257D 变频调速;
C.
p.p1%2520%257Bmargin%253A%25200.0px%25200.0px%25200.0px%25200.0px%253B%2520text-align%253A%2520justify%253B%2520font%253A%252010.5px%2520Helvetica%257D 在转子回路中串电阻调速;
D.
p.p1%2520%257Bmargin%253A%25200.0px%25200.0px%25200.0px%25200.0px%253B%2520text-align%253A%2520justify%253B%2520font%253A%252010.5px%2520Helvetica%257D 在定子回路中串电阻调速。