[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fZLVKopYPxcr286HY6PFqcBwXQ1VbSQAu-p9eCLjMb38":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":12,"related":13,"source":20,"type":47},[],"2023-12-03 15:08:06",110481380,[],{"courseId":9,"courseImg":10,"courseName":11},"731cc7bb5d02f59dcbabe5490832af76","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0775f6b4cedd4de01439f3a3176777f8.jpg","电力电子技术","4单相全桥逆变电路波形和输出计算 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F91f12be66ededbb7636072c269805c6a.PNG\">",[14,22,27,32,37,42,48,53,58,63],{"answer":15,"createTime":16,"id":17,"options":18,"question":19,"source":20,"type":21},[],"2023-12-03 15:08:05",110481345,[],"电力电子器件在串联和并联使用时应注意什么问题","v1",4,{"answer":23,"createTime":16,"id":24,"options":25,"question":26,"source":20,"type":21},[],110481347,[],"6、某晶闸管型号规格为KP200-8D,试问型号规格代表什么意义",{"answer":28,"createTime":16,"id":29,"options":30,"question":31,"source":20,"type":21},[],110481349,[],"1.电力电子器件直接用于处理电能的主电路,因而同处理信息的电子器件相比,它有那些特征?",{"answer":33,"createTime":16,"id":34,"options":35,"question":36,"source":20,"type":21},[],110481354,[],"2请画出MOSFET的转移特性和输出特性,并做简要描述.P32",{"answer":38,"createTime":16,"id":39,"options":40,"question":41,"source":20,"type":21},[],110481360,[],"4电压型逆变电路中反馈二极管的作用是什么",{"answer":43,"createTime":16,"id":44,"options":45,"question":46,"source":20,"type":47},[],110481364,[],"2. 单相交流调压器如图3,电源为50Hz 220V,阻感串联作为负载,其中R=5W, L=20mH ,试求:(1)开通角 a 的变化范围;(2)负载电流io的最大有效值;(3)最大输出功率P及此时电源侧的功率因数l.(14分) \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5951a322d425c0444d78b16487089571.png\">",7,{"answer":49,"createTime":16,"id":50,"options":51,"question":52,"source":20,"type":47},[],110481368,[],"1.电路如图1所示,已知 U2=100V,E=100V, R=2.0W,a=30°.请问这是什么电路?实现什么功能?不考虑L时,在图2画出 ud、id、uVT1和 ia的波形,计算 Ud、Id和功率因数l; \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fca1c94bbcc3795066bac0e60036bce05.png\">\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3df6e81c4c0e533169097e52b28697fb.png\">",{"answer":54,"createTime":16,"id":55,"options":56,"question":57,"source":20,"type":47},[],110481372,[],"请绘制三相桥式全控整流电路原理图",{"answer":59,"createTime":5,"id":60,"options":61,"question":62,"source":20,"type":47},[],110481377,[],"如图所示单相半波可控整流器,电阻性负载,电源电压U2为220V,要求的直流输出电压为50 V,直流输出平均电流为20A. \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcaef3aaf22f405797b1e60cc1b801b57.png\"> 试计算: (1)晶闸管的控制角. (2)输出电流有效值. (3)电路的功率因数. (4)晶闸管的额定电压和额定电流",{"answer":64,"createTime":5,"id":6,"options":65,"question":12,"source":20,"type":47},[],[]]