[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f_QVpzJFWXQPxwf3oS34hKZ6kTjHDLvg6fzGneZfLiZ8":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-06-12 17:26:44",60504236,[8,9,10,11],"p1=p2","p1&gt;p2","p1&lt;p2","无法确定",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},13,"01b49e1b09188649b46a5ddc28ea0ec8","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fade026935985eb37cc6e965b26524f34.jpg","21222电机学","exam_95163239","交流绕组测试(电动势、磁动势)","交流电机定子磁极对数为p1、转子磁极对数为p2,则p1和p2的关系为( )",[21,32,41,50,53,62,70,78,83,88],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],60504233,[25,26,27,28],"都减小","不变","基波电动势不变,谐波电动势减小","都增大","交流绕组采用短距绕组和分布绕组之后,其基波电动势与谐波电动势( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],60504234,[36,37,38,39],".每相电流的最大值","每相电流的有效值","线电流","三相电流代数和","三相交流电机的定子合成磁动势圆形旋转磁动势,其幅值计算公式中的电流为( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],60504235,[45,46,47,48],"f1","vf1","f1\u002F v","2vf1","频率为f1的三相对称正弦电流通入三相对称定子绕组中产生的v次空间谐波磁通,在定子绕组中感应电动势的频率为( )",{"answer":51,"createTime":5,"id":6,"options":52,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],60504237,[57,58,59,60],"椭圆形","圆形","正弦波","三角波","三相对称电流通入三相交流电机中,则定子合成磁动势的波幅轨迹为( )",{"answer":63,"createTime":5,"id":64,"options":65,"question":69,"source":30,"type":31},[],60504238,[66,67,26,68],"减小","增加","无关","某交流绕组出现故障,进行维修时,把每相绕组的匝数做了适当的增加,则气隙中每极磁通将( )",{"answer":71,"createTime":5,"id":72,"options":73,"question":76,"source":30,"type":77},[],60504239,[74,75],"正确","错误","交流绕组中,采用分布和短距绕组的方法,可以削弱高次谐波",3,{"answer":79,"createTime":5,"id":80,"options":81,"question":82,"source":30,"type":77},[],60504240,[74,75],"5次谐波旋转磁动势的方向和基波旋转磁动势的转向相反",{"answer":84,"createTime":5,"id":85,"options":86,"question":87,"source":30,"type":77},[],60504241,[74,75],"7次谐波旋转磁动势的方向和基波旋转磁动势的转向相同",{"answer":89,"createTime":5,"id":90,"options":91,"question":92,"source":30,"type":77},[],60504242,[74,75],"单相绕组的脉振磁通势不可分解"]