【摘要】 随机开关调制技术可以降低开关电源电磁干扰.混沌是确定性系统产生的随机信号,可将其用于开关电源随机开关调制的控制信号.以蔡氏电路的混沌输出作为信号源,给出用于控制开关电源开关调制信号的软件实现方法.将生成的混沌调制开关信号应用于boost型电路,验证混沌开关调制技术降低电磁干扰水平的效果.计算机模拟结果表明,以蔡氏电路的混沌输出作为信号源生成的混沌开关调制信号,可以降低开关电源的电磁干扰水平.更多还原

【Abstract】 Randomswitching modulation can reduce the electromagnetic interference (EMI) of switchingmode power supply(SMPS).Chaotic signals are sorts of stochastic signals generated from deterministic nonilinear system,and can be used as random modulating signals to control SMPS.In this paper,we use the output of the "Chua’s circuit" as signal source and present a method to realize the chaosswitching modulation signals which are used to control SMPS.It illustrated the effect of depressing the level of EMI of SMPS by applying the chaosswitching modulation signal to boost DC/DC converter.The computer simulation result demonstrated that the chaosswitching modulation signal,which is generated from "Chua’s circuit",can be used to depress the level of EMI of SMPS.更多还原