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Precise modeling and dynamic characteristics of valley V2 controlled Boost converter

He Sheng-Zhong Zhou Guo-Hua Xu Jian-Ping Wu Song-Rong Yan Tie-Sheng Zhang Xi

Precise modeling and dynamic characteristics of valley V2 controlled Boost converter

He Sheng-Zhong, Zhou Guo-Hua, Xu Jian-Ping, Wu Song-Rong, Yan Tie-Sheng, Zhang Xi
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  • PDF Downloads:  665
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Publishing process
  • Received Date:  27 March 2014
  • Accepted Date:  04 May 2014
  • Published Online:  05 September 2014

Precise modeling and dynamic characteristics of valley V2 controlled Boost converter

  • 1. School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 51177140, 61371033), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20130184120011), the Sichuan Provincial Youth Science and Technology Fund, China (Grant No. 2014JQ0015), and the Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China (Grant No. 142027).

Abstract: A discrete iterative map model of valley V2 controlled Boost converter is established, based on which the bifurcation diagrams are obtained with the variation of input voltage, output capacitance and its equivalent series resistance (ESR). Jacobi matrix at a fixed point is also derived, and according to it, the converter stability is analyzed using characteristic values and maximum Lyapunov exponent, thus the correctness of bifurcation analysis is validated. The effect of input voltage, output capacitance and its ESR on the dynamic characteristics of valley V2 controlled Boost converter is mainly investigated. It is found that as the input voltage increases continuously, the valley V2 controlled Boost converter changes from continuous conduction mode (CCM) period-1 to CCM period-2 due to period-doubling bifurcation, and comes into CCM chaos due to border collision bifurcation. The converter has the same bifurcation routes at output capacitance and its ESR: with gradual reduction of output capacitance or its ESR, the valley V2 controlled Boost converter behaves the evolutive dynamic behavior from CCM period-1 to CCM period-2, CCM period-4, CCM period-8, and CCM chaos. Finally, the simulation and experimental circuits are set up, and the correctness of theoretical analysis is verified by simulation and experimental results.

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