[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$ff_CXmTu8A9vdedeOcC1UWc7Y25Jeqp49xYUcgiGxqik":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":27,"type":53},[],"2023-05-08 22:02:20",923220966,[8,9,10,11],"恒比例控方式","恒磁通控制方式","恒功率控制方式","恒电流控制方式",{"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","45605141","变频调速技术教程考试","变频器的基本控制方式有哪些( )",[20,29,34,39,44,54,63,72,81,90],{"answer":21,"createTime":5,"id":22,"options":23,"question":26,"source":27,"type":28},[],923220898,[24,25],"对","错","电源侧电磁接触器可以频繁地控制变频器的启动和停止.( )","v2",3,{"answer":30,"createTime":5,"id":31,"options":32,"question":33,"source":27,"type":28},[],923220902,[24,25],"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.( )",{"answer":35,"createTime":5,"id":36,"options":37,"question":38,"source":27,"type":28},[],923220906,[24,25],"变频器有过电流保护功能.( )",{"answer":40,"createTime":5,"id":41,"options":42,"question":43,"source":27,"type":28},[],923220908,[24,25],"PWM控制技术一直是变频技术的核心技术之一.( )",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":27,"type":53},[],923220930,[48,49,50,51],"P1001","P1002","P1003","P1004","G120变频器的宏程序3,调试转速使用哪些参数( )",1,{"answer":55,"createTime":5,"id":56,"options":57,"question":62,"source":27,"type":53},[],923220938,[58,59,60,61],"DI0端子","DI1端子","DI2端子","DI3端子","G120变频器的宏程序1,使用以下哪些端子( )",{"answer":64,"createTime":5,"id":65,"options":66,"question":71,"source":27,"type":53},[],923220948,[67,68,69,70],"降低变频器系统所产生的谐波分量","提高功率因数","抑制来自电网的浪涌电流对变频器的冲击","降低功率因数","电源侧交流电抗器的作用?( )",{"answer":73,"createTime":5,"id":74,"options":75,"question":80,"source":27,"type":53},[],923220952,[76,77,78,79],"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":82,"createTime":5,"id":83,"options":84,"question":89,"source":27,"type":53},[],923220958,[85,86,87,88],"可以实现对电动机速度连续调节","可以提供正反转控制工艺","可以提供多段速控制工艺","可以驱动电动机实现软启动,减少启动电流对电机的影响,延长使用寿命","变频器的功能有( )",{"answer":91,"createTime":5,"id":6,"options":92,"question":18,"source":27,"type":53},[],[8,9,10,11]]