【判断题】【消耗次数：1】
他励直流电动机采用电枢回路串电阻调速可以实现无级调速。
①
正确
②
错误
参考答案：
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相关题目
【单选题】
下列属于直流电动机调速的主要优点是（）。
①
调速范围大，调速比可达200 （他励式）以上（调速比等于最大转速和最小转速之比）。
②
以上都是
③
速均匀平滑，可以无级调速
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