[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f5NqxRiTPlIUP82ca8vAJPeJWAnyu7Py8Rtg1o37KOkw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":29,"type":30},[],"2024-05-05 15:16:59",141482886,[8,9,10,11],"减小 减小","减小 不变","不变 减小","不变 不变",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},5,"c86f421bd28b74c8bfca082f3505d50b","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffe5ce7d34817480fd9c17f707bddfcd3.png","现代调速技术","730fa150aa5b4e4da313e250d1f27a81","现代调速:第17次课预习自测题","异步电机采用变频调速方案时,基频以下调速时电机的磁通如何?基频以上调速时磁通如何",[21,31,34,43,52],{"answer":22,"createTime":5,"id":23,"options":24,"question":28,"source":29,"type":30},[],141482885,[25,26,27],"转差功率消耗型","转差功率不变型","转差功率馈送型","异步电机采用变频调速方案时,对于转差功率的利用情况是怎样的","v1",0,{"answer":32,"createTime":5,"id":6,"options":33,"question":19,"source":29,"type":30},[],[8,9,10,11],{"answer":35,"createTime":5,"id":36,"options":37,"question":42,"source":29,"type":30},[],141482887,[38,39,40,41],"定子电压Us","定子磁通感应的电动势Es","气隙磁通控制感应的电动势Eg","转子磁通感应的电动势Er","以下四种电压,在实际控制中,哪种电压最容易控制?\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbccda9acdca3a0580af8397e856ac2af.png\">",{"answer":44,"createTime":5,"id":45,"options":46,"question":51,"source":29,"type":30},[],141482888,[47,48,49,50],"恒压频比控制","恒定子磁通控制","恒气隙磁通控制","恒转子磁通控制","以下四种电压-频率协调控制方案中,哪种方案最优?\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe90e8dcaddf33b5ed906ac5557a6393a.png\">",{"answer":53,"createTime":5,"id":54,"options":55,"question":58,"source":29,"type":30},[],141482889,[56,57],"交-直-交","交-交","电力电子变压变频器,应用较多的是哪种主电路拓扑结构"]