Conducted EMI Suppression by Random Carrier Frequency Modulation Techniques
Random Carrier-Frequency (RCF) control mode is a new control scheme. When applied to DC/DC converters, it reduces conducted EMI significantly. However, limited theoretical studies about RCF control mode are available. In this paper, the analytical expression of the amplitude of voltage power spectra density in the RCF mode is deduced. The level of randomness is defined .The effects of the level of randomness on reducing the peak level of the power spectra density are analyzed .Theoretical predictions are confirmed with experiment. Finally special attention is given to the output voltage ripple under different spread spectrum modulation techniques.
Haiyan Guo Zhaoji Li Bo Zhang Zehong Li
State Key Laboratory of Power Electronics , University of Electronic Science and Technology of China , Chengdu City, China
国际会议
2009国际通信电路与系统学术会议(ICCCAS 2009)(2009 International Conference on Communications，Circuits and Systems)
成都
英文
693-696
2009-07-23（万方平台首次上网日期，不代表论文的发表时间）