直流斩波电路2010直流斩波电路建模仿真实训陈巧合应电0842010/12/29目录一、降压式直流斩波电路(Buck).................................................................3(1)原理图.............................................................................................3(2)建立仿真模型..................................................................................3(3)仿真参数设置..................................................................................7(4)小结.................................................................................................8二、升压式直流斩波电路(Boost)...............................................................9(1)原理图...........................................................................................9(3)仿真参数设置................................................................................10(4)小结...............................................................................................12三、升-降压式直流斩波电路(Buck-Boost)................................................12(1)原理图.........................................................................................12(2)电路建模.......................................................................................13(3)仿真参数设置................................................................................14(4)小结...............................................................................................15四、Cuk直流斩波电路建模...........................................................................16(1)原理图...........................................................................................16(3)仿真参数设置................................................................................17(4)心得体会.......................................................................................18五、直流斩波电路建模仿真实训与分析总结..........................................19项目三直流斩波电路建模仿真实训班级,应电084学号,40号姓名,陈巧合一、降压式直流斩波电路(Buck)(1)原理图在控制开关VT导通ton期间,二极管VD反偏,电源E通过电感L向负载R供电,此间iL增加,电感L的储能也增加,导致在电感两端有一个正向电压Ul=E-u0,左正右负,这个电压引起电感电流iL的线性增加。2)在控制开关VT关断toff期间,电感产生感应电势,左负右正,使续流二极管VD导通,电流iL经二极管VD续流,u
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