[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f3GACTUOIOUIynpR0_D-Mo28TfNOLwlKs-wZs___aA6w":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-12-28 07:24:16",290110573,[8,9,10,11],"步进电动机","伺服电动机","测速发电机","直线电动机",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},120,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","exam_168250026","","用作控制系统中的测速元件,能测出电动机和执行机构的转速",[21,32,41,50,59,62,71,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],290110569,[25,26,27,28],"电动机的最大转矩","电动机的启动转矩","电动机的额定功率与额定转速的比值","电动机在额定电压和额定负载下运行时的转矩","三相异步电动机的额定转矩是指()","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],290110570,[36,37,38,39],"3000r\u002Fmin","1500 r\u002Fmin","1000 r\u002Fmin","750 r\u002Fmin","一台三相八极异步电动机的同步转速为()",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],290110571,[45,46,47,48],"一次绕组加额定直流电压,二次绕组接负载","一次绕组加额定正弦交流电压,二次绕组接负载","二次绕组加额定直流电压,一次绕组接负载","二次绕组加额定正弦交流电压,一次绕组接负载","变压器负载运行指()",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],290110572,[54,55,56,57],"负载转矩与转速成正比","负载转矩与转速成反比","负载转矩与转速的平方成正比","负载转矩与转速的平方成反比","恒功率负载的特点是( )",{"answer":60,"createTime":5,"id":6,"options":61,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],290110574,[66,67,68,69],"3000 r\u002Fmin","6000 r\u002Fmin","9000 r\u002Fmin","12000 r\u002Fmin","有一台四极交流伺服电动机,电源频率为400Hz,其同步速为()",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],290110575,[75,76,77,78],"转速与转子电流","电压与电磁转矩","转速与电磁转矩","转速与输出功率","三相异步电动机的机械特性指( )的关系",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],290110576,[84,85,86,87],"额定转速","额定电压、频率","额定转矩","额定温度","三相异步电动机的固有机械特性指三相异步电动机工作在( )下,定子及转子回路不外接任何电路元件时的机械特性",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],290110577,[93,94,95,96],"直流电动机","直流发电机","交流电动机","交流发电机","当直流电动机刚进入能耗制动状态时,电动机将因惯性继续旋转,此时电机实际处于( )运行状态",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],290110578,[102,103,104,105],"阻抗","短接","开路","电抗","电容器在直流回路中相当于()"]