[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fWRUzgyDiJ2rvxXOIrcnZAixpJ6ZcBygd6uy0PojwDSY":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":13,"related":14,"source":20,"type":21},[],"2024-12-16 10:37:03",1000142120,[8,9],"对","错",{"courseImg":11,"courseName":12},"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2ed07ce117602b5cc778b78948d0bd7a.jpg","[公开课]变频调速技术","CU240E-2支持现场总线USS通信.( )",[15,22,32,41,50,59,69,78,87,90],{"answer":16,"createTime":5,"id":17,"options":18,"question":19,"source":20,"type":21},[],1000141494,[8,9],"变频器输出的波形和载波频率有关,频率越高,越接近正弦波.( )","v2",3,{"answer":23,"createTime":5,"id":24,"options":25,"question":30,"source":20,"type":31},[],1000141773,[26,27,28,29],"运行速度显示","电压值显示","电流值显示","频率显示","MONITORING监视菜单的功能,下面表述正确的是( )",1,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":20,"type":31},[],1000141888,[36,37,38,39],"模拟量信号","干扰信号","频率脉冲信号","开关信号","变频器的控制信号分为:( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":20,"type":31},[],1000141897,[45,46,47,48],"面板运行","端子运行","串行通信链接运行","模拟运行","变频器的运行方法通常有三种:( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":20,"type":31},[],1000141925,[54,55,56,57],"变极对数调速","变负荷调速","变频调速","变转差率调速","三相异步电动机的调速方式有:( )",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":20,"type":68},[],1000142011,[63,64,65,66],"电源","电磁噪声","高次谐波","信号","变频器输出侧抗干扰措施中,为了减少( ),可在输出侧安装输出电抗器",0,{"answer":70,"createTime":5,"id":71,"options":72,"question":77,"source":20,"type":68},[],1000142040,[73,74,75,76],"直接选择的方式","直接选择+ON的方式","直接选择的方式和直接选择+ON的方式","二进制编码+ON的方式","在哪种方式下,当两个或多个端子接通时频率为各自频率的代数和( )",{"answer":79,"createTime":5,"id":80,"options":81,"question":86,"source":20,"type":68},[],1000142074,[82,83,84,85],"反接制动","再生制动","电动","停止","交&mdash;直&mdash;交变频器的制动电阻在电动机处于( )时起作用",{"answer":88,"createTime":5,"id":6,"options":89,"question":13,"source":20,"type":21},[],[8,9],{"answer":91,"createTime":5,"id":92,"options":93,"question":94,"source":20,"type":21},[],1000142124,[8,9],"G120变频器的宏程序17、18,调试转速使用AIN1端子.( )"]