【单选题】
关于恒功率负载,说法正确的是
①
<imgalt=""src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205100306_201.png"/>=常数,<imgalt=""src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205100946_605.png"/>
②
<imgalt=""src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205100349_854.png"/>=常数,<imgalt=""src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205101424_297.png"/>
③
<imgalt=""src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205100429_32.png"/>=常数<imgalt=""src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205100441_452.png"/>
【单选题】
空间电角度<imgwidth="32"height="30"src="http://wljy.whut.edu.cn:80/uploadfiles/word/DJYTFD.files/DJYTFD29245.png">与机械角度β之间的关系为()
①
<imgwidth="87"height="43"src="http://wljy.whut.edu.cn:80/uploadfiles/word/DJYTFD.files/DJYTFD29371.png">
②
<imgwidth="134"height="43"src="http://wljy.whut.edu.cn:80/uploadfiles/word/DJYTFD.files/DJYTFD29492.png">
③
<imgwidth="134"height="43"src="http://wljy.whut.edu.cn:80/uploadfiles/word/DJYTFD.files/DJYTFD29611.png">
【单选题】
一台三相6极电动机,每极每相槽数q=3,则定子总槽数Z1和极距<imgsrc="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191203/20191203180440_306.png"alt=""/>分别为()
①
<imgsrc="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191203/20191203181207_212.png"alt=""/>
②
<imgsrc="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191203/20191203181245_909.png"alt=""/>
③
<imgsrc="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191203/20191203180627_185.png"alt=""/>
【单选题】
一台变单相压器在高压边做空载实验求得的励磁参数和在低压边做空载实验求得的参数应()。假设<imgwidth="184"height="48"src="http://wljy.whut.edu.cn:80/uploadfiles/word/DJYTFD.files/DJYTFD36321.png">.
①
大<imgwidth="40"height="43"src="http://wljy.whut.edu.cn:80/uploadfiles/word/DJYTFD.files/DJYTFD36433.png">倍
②
小<imgwidth="40"height="43"src="http://wljy.whut.edu.cn:80/uploadfiles/word/DJYTFD.files/DJYTFD36556.png">