[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f-KrhJ8XezcQE4FSb_N7RPI3gFE5QS0efhxs62nqWIMM":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":11,"question":18,"related":19,"source":23,"type":24},[],"2023-06-16 13:34:35",65013602,[8,9,10],"改变电源频率","改变电源电压","改变定子绕组中电流的相序",{"count":12,"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},17,"8bbf9727ef5a35312350df5cd9e35f66","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3033db31ca601b12ba75bd27551d9ab7.png","电机与拖动","63d03aec86884d808a5bea71d46a5587","在线测试","改变三相异步电动机转向的方法是( )",[20,25,34,43,52,61,69,76,85,94],{"answer":21,"createTime":5,"id":6,"options":22,"question":18,"source":23,"type":24},[],[8,9,10],"v1",0,{"answer":26,"createTime":5,"id":27,"options":28,"question":33,"source":23,"type":24},[],65013603,[29,30,31,32],"△接法","丫接法","△、丫都可以","△、丫都不可以","三相异步电动机铭牌上标明:&quot;额定电压380\u002F220V,接法丫\u002F△&quot;.当电网电压为380V时,这台三相异步电动机应采用( )",{"answer":35,"createTime":5,"id":36,"options":37,"question":42,"source":23,"type":24},[],65013604,[38,39,40,41],"增加叠压强","降低叠压强度","减小涡流损耗","运转功率","电机定子铁心硅钢片的两面均涂有绝缘漆是为了( )",{"answer":44,"createTime":5,"id":45,"options":46,"question":51,"source":23,"type":24},[],65013605,[47,48,49,50],"1000转\u002F分","960转\u002F分","40转\u002F分","0转\u002F分","三相六极异步电动机,接到频率为50Hz的电网上额定运行时,其转差率SN=0.04,额定转速为( )",{"answer":53,"createTime":5,"id":54,"options":55,"question":60,"source":23,"type":24},[],65013606,[56,57,58,59],"26.3A","15.2A","18.4A","缺少条件A.B.C答案都不对","某三相电动机的额定值如下:功率10KW、转速1420r\u002Fmin、效率88%、电压380V、则额定电流为( )",{"answer":62,"createTime":5,"id":63,"options":64,"question":68,"source":23,"type":24},[],65013607,[65,66,67],"低于同步转速","高于同步转速","等于同步转速","异步电动机在正常旋转时,其转速( )",{"answer":70,"createTime":5,"id":71,"options":72,"question":75,"source":23,"type":24},[],65013608,[73,74],"恒定磁场","旋转磁场","在三相交流异步电动机定子绕组中通入三相对称交流电,则在定子与转子的空气隙间产生的磁场是( )",{"answer":77,"createTime":5,"id":78,"options":79,"question":84,"source":23,"type":24},[],65013609,[80,81,82,83],"降低电压","降低电流","将任两根电源线对调","降低线路功率","要使三相异步电动机反转,只要( ) 就能完成",{"answer":86,"createTime":87,"id":88,"options":89,"question":92,"source":23,"type":93},[],"2024-12-02 17:38:23",168563467,[90,91],"正确","错误","电动机的额定功率是指额定运行时从电源输入的电功率",3,{"answer":95,"createTime":87,"id":96,"options":97,"question":98,"source":23,"type":93},[],168563468,[90,91],"三相异步电动机的旋转方向决定于定子绕组中通入的三相电流的相序"]