Study on the Bifurcation Series in Buck Converter Controlled by Current Mode
Power converters are practical nonlinear systems which find applications in many electronic products and equipments. It has been shown that the operation of power converters can easily become chaotic and bifurcate when they fail to maintain normal periodic operation. To get the regulation of losing stability in the operational process of DC-DC converters, the author studied the bifurcation series of a Buck converter controlled under current mode. Based on the state equation of Buck converter, the Runge-Kutta arithmetic was used for simulation, and thus the results are concluded. We can choose the circuit state variables at every timer pulse to form a Poincare section and plot the bifurcation diagram with reference current as the bifurcation parameter. Then, we got the critical values of the bifurcation series for the Buck converter at every bifurcation point by the method of discrete mapping and iteration. In this way, simulation gains the same results as those from theoretical analysis.
Buck converter bifurcation series bifurcation point discrete mapping
Zhu Qixiang Hu Naihong Zhou Yufei Chen Junning
Information Engineering College Anhui University of Finance and Economics,Bengbu 233041 School of Electronic Science and Technology Anhui University,Hefei 230039 China
国际会议
厦门
英文
20-25
2010-05-22（万方平台首次上网日期，不代表论文的发表时间）