摘要
基于MCU和CPLD实现了开关变换器的4种混沌调制模式:混沌脉冲宽度调制(CPWM)、混沌脉冲位置调制(CPPM)、变占空比混沌载频调制(CCFM-VD)和定占空比混沌载频调制(CCFMFD)。实验结果表明定占空比混沌载频调制能够有效抑制开关变换器的电磁干扰(EM I),同时对输出电压的纹波影响较小,是一种较理想的混沌调制模式。
Four chaotic modulations by using MCU and CPLD in off-line switching converters are realized, The four chaotic modulations are chaotic pulse-width modulation ( CPWM ) , chaotic pulse-position modulation (CPPM), chaotic carrier-frequency modulation with variable duty cycle (CCFMVD) and chaotic carrier-frequency modulation with fixed duty cycle (CCFMFD). The experiment results demonstrate that CCFMFD can effectively suppress the EMI of off-line switching converters and hardly influence output voltage ripples. So CCFMFD is an effective chaotic modulation scheme.
出处
《航天控制》
CSCD
北大核心
2006年第4期87-90,共4页
Aerospace Control