[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fIWmk4DDB1lnIzqak7DjU6ZvnUC8dOdiGCHcEYLjcdFc":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":29,"type":30},[],"2023-05-07 18:47:04",967063816,[8,9,10,11],"转矩补偿","频率偏置","段速控制","电压自动控制",{"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},"1000070936","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2ed07ce117602b5cc778b78948d0bd7a.jpg","[公开课]变频调速技术","55025427","变频调速技术教程考试","工业洗衣机甩干时转速快,洗涤时转速慢,烘干时转速更慢,故需要变频器的( )功能",[20,31,40,43,52,61,70,79,88,97],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],967063812,[24,25,26,27],"平方根","平方率","立方根","立方率","变频器常用的转矩补偿方法有:线性补偿、分段补偿和( )补偿","v2",0,{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":29,"type":30},[],967063813,[35,36,37,38],"高转矩运行","泵类和风机类","低转矩运行","转速高","平方率转矩补偿法多应用在( )的负载",{"answer":41,"createTime":5,"id":6,"options":42,"question":18,"source":29,"type":30},[],[8,9,10,11],{"answer":44,"createTime":5,"id":45,"options":46,"question":51,"source":29,"type":30},[],967063821,[47,48,49,50],"5%~10%","10%~20%","20%~30%","30%~40%","实践表明,风机或泵类负载恒速运转改为变频调速后,节能可达( )",{"answer":53,"createTime":5,"id":54,"options":55,"question":60,"source":29,"type":30},[],967063827,[56,57,58,59],"使电动机温度升高","噪声增大","产生振动力矩","产生谐振","下面( )不是变频器输出的高次谐波对电动机产生的影响",{"answer":62,"createTime":5,"id":63,"options":64,"question":69,"source":29,"type":30},[],967063828,[65,66,67,68],"不变","增大","减小","不能判断","若保持电源电压不变,降低频率,电动机的工作电流会( )",{"answer":71,"createTime":5,"id":72,"options":73,"question":78,"source":29,"type":30},[],967063831,[74,75,76,77],"0—40C","0—50C","0—40C或-10C—50C","-10C—40C","变频器周围温度的允许范围为( )",{"answer":80,"createTime":5,"id":81,"options":82,"question":87,"source":29,"type":30},[],967063833,[83,84,85,86],"数字量端子运行","模拟量端子运行","输出端子运行","按钮运行","变频器的运行方式有:面板运行、( )、通信链接运行",{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":29,"type":30},[],967063836,[92,93,94,95],"预置给定","模拟量通道1给定","模拟量通道2给定","PLC给定","变频器的频率给定方式有面板给定、( )、外接给定和通信给定",{"answer":98,"createTime":5,"id":99,"options":100,"question":105,"source":29,"type":30},[],967063837,[101,102,103,104],"P0003","P0004","P0700","P1000","MM430变频器参数过滤,需设置参数( )"]