Fast-Scale and Slow-Scale Subharmonic Oscillation of Valley Current-Mode Controlled Buck Converter  

作　　者：周国华 许建平 包伯成 张斐 刘雪山 

机构地区：[1]School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031 [2]School of Electrical and Information Engineering, Jiangsu Teachers University of Technology, Changzhou 213001

出　　处：《Chinese Physics Letters》2010年第9期50-53,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 50677056, the Natural Science Foundation of Jiangsu Province under Grant No BK2009105, Cultivation Project of Excellent Doctorate Dissertation of Southwest Jiaotong University, and Doctoral Innovation Foundation of Southwest Jiaotong University.

摘　　要：A valley current-mode （VCM） controfled buck converter with current source load （CSI） has complex phenomena of fast-scale and slow-scale subharmonic oscillations. The piecewise smooth switching model of the VCM controlled buck converter with CSI is established. It is found that attractive regions of fast-scale and slow-scale subharmonic oscillations exist in the bifurcation diagram, and two tori exist in the corresponding Poincare mapping. The research results by time-domain simulation indicate that U-type subharmonic oscillation （SO） constituted by SO and frequency-reduced subharmonic oscillation （FSO） exists in inductor current, and sine-type SO constituted by fast scale and low scale exists in output voltage respectively. Experimental results are given to verify the analysis and simulation results.A valley current-mode （VCM） controfled buck converter with current source load （CSI） has complex phenomena of fast-scale and slow-scale subharmonic oscillations. The piecewise smooth switching model of the VCM controlled buck converter with CSI is established. It is found that attractive regions of fast-scale and slow-scale subharmonic oscillations exist in the bifurcation diagram, and two tori exist in the corresponding Poincare mapping. The research results by time-domain simulation indicate that U-type subharmonic oscillation （SO） constituted by SO and frequency-reduced subharmonic oscillation （FSO） exists in inductor current, and sine-type SO constituted by fast scale and low scale exists in output voltage respectively. Experimental results are given to verify the analysis and simulation results.

分 类 号：TM42[电气工程—电器] TN86[电子电信—信息与通信工程]