Dynamics and stabilization of peak current-mode controlled buck converter with constant current load

doi:10.1088/1674-1056/24/10/100504

中国物理B ›› 2015, Vol. 24 ›› Issue (10): 100504-100504.doi: 10.1088/1674-1056/24/10/100504

Dynamics and stabilization of peak current-mode controlled buck converter with constant current load

冷敏瑞, 周国华, 张凯暾, 李振华

School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China

收稿日期:2015-02-13 修回日期:2015-04-22 出版日期:2015-10-05 发布日期:2015-10-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 61371033), the Fok Ying-Tung Education Foundation for Young Teachers in the Higher Education Institutions of China (Grant No. 142027), the Sichuan Provincial Youth Science and Technology Fund, China (Grant Nos. 2014JQ0015 and 2013JQ0033), and the Fundamental Research Funds for the Central Universities, China (Grant No. SWJTU11CX029).

Dynamics and stabilization of peak current-mode controlled buck converter with constant current load

Leng Min-Rui (冷敏瑞), Zhou Guo-Hua (周国华), Zhang Kai-Tun (张凯暾), Li Zhen-Hua (李振华)

School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China

Received:2015-02-13 Revised:2015-04-22 Online:2015-10-05 Published:2015-10-05
Contact: Zhou Guo-Hua E-mail:ghzhou-swjtu@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61371033), the Fok Ying-Tung Education Foundation for Young Teachers in the Higher Education Institutions of China (Grant No. 142027), the Sichuan Provincial Youth Science and Technology Fund, China (Grant Nos. 2014JQ0015 and 2013JQ0033), and the Fundamental Research Funds for the Central Universities, China (Grant No. SWJTU11CX029).

摘要/Abstract

摘要： The discrete iterative map model of peak current-mode controlled buck converter with constant current load (CCL), containing the output voltage feedback and ramp compensation, is established in this paper. Based on this model the complex dynamics of this converter is investigated by analyzing bifurcation diagrams and the Lyapunov exponent spectrum. The effects of ramp compensation and output voltage feedback on the stability of the converter are investigated. Experimental results verify the simulation and theoretical analysis. The stability boundary and chaos boundary are obtained under the theoretical conditions of period-doubling bifurcation and border collision. It is found that there are four operation regions in the peak current-mode controlled buck converter with CCL due to period-doubling bifurcation and border-collision bifurcation. Research results indicate that ramp compensation can extend the stable operation range and transfer the operating mode, and output voltage feedback can eventually eliminate the coexisting fast-slow scale instability.

关键词: buck converter, constant current load, discrete iterative map model, ramp compensation

Abstract: The discrete iterative map model of peak current-mode controlled buck converter with constant current load (CCL), containing the output voltage feedback and ramp compensation, is established in this paper. Based on this model the complex dynamics of this converter is investigated by analyzing bifurcation diagrams and the Lyapunov exponent spectrum. The effects of ramp compensation and output voltage feedback on the stability of the converter are investigated. Experimental results verify the simulation and theoretical analysis. The stability boundary and chaos boundary are obtained under the theoretical conditions of period-doubling bifurcation and border collision. It is found that there are four operation regions in the peak current-mode controlled buck converter with CCL due to period-doubling bifurcation and border-collision bifurcation. Research results indicate that ramp compensation can extend the stable operation range and transfer the operating mode, and output voltage feedback can eventually eliminate the coexisting fast-slow scale instability.

Key words: buck converter, constant current load, discrete iterative map model, ramp compensation

中图分类号: (Nonlinear dynamics and chaos)

05.45.-a

84.30.Jc (Power electronics; power supply circuits)

冷敏瑞, 周国华, 张凯暾, 李振华. Dynamics and stabilization of peak current-mode controlled buck converter with constant current load[J]. 中国物理B, 2015, 24(10): 100504-100504.

Leng Min-Rui (冷敏瑞), Zhou Guo-Hua (周国华), Zhang Kai-Tun (张凯暾), Li Zhen-Hua (李振华). Dynamics and stabilization of peak current-mode controlled buck converter with constant current load[J]. Chin. Phys. B, 2015, 24(10): 100504-100504.

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Dynamics and stabilization of peak current-mode controlled buck converter with constant current load

Dynamics and stabilization of peak current-mode controlled buck converter with constant current load

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