中国物理B ›› 2008, Vol. 17 ›› Issue (7): 2394-2404.doi: 10.1088/1674-1056/17/7/012

• GENERAL • 上一篇    下一篇

Fast-scale border collision bifurcation in SEPIC power factor pre-regulators

刘芳   

  1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China; College of Electrical and Information Engineering, North China University for Nationalities, Yinchuan 750021, China
  • 收稿日期:2008-01-07 修回日期:2008-01-30 出版日期:2008-07-09 发布日期:2008-07-09

Fast-scale border collision bifurcation in SEPIC power factor pre-regulators

Liu Fang(刘芳)   

  1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China; College of Electrical and Information Engineering, North China University for Nationalities, Yinchuan 750021, China
  • Received:2008-01-07 Revised:2008-01-30 Online:2008-07-09 Published:2008-07-09

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摘要： In this paper we report a kind of fast-scale instability occurring in the single-ended primary inductance converter (SEPIC) power factor pre-regulator, which is designed to operate in discontinuous conduction mode. Main results are given by exact cycle-by-cycle computer simulations as well as theoretical analysis. It is found that the instability phenomenon manifests itself as a fast-scale bifurcation at the switching period, which implies the occurrence of border collision bifurcation, or is related to the transition of the regular operating mode of the SEPIC. According to the theoretical analysis and simulation results, the effects of parameters on system stability, and the locations of the bifurcation points are confirmed. Moreover, the effects of such an instability on power factor and switching stress are also discussed. Finally, the occurrence of the asymmetric bifurcation locations is investigated. The results show that this work provides a convenient means of predicting stability boundaries which can facilitate the selection of the practical parameters.

Abstract: In this paper we report a kind of fast-scale instability occurring in the single-ended primary inductance converter (SEPIC) power factor pre-regulator, which is designed to operate in discontinuous conduction mode. Main results are given by exact cycle-by-cycle computer simulations as well as theoretical analysis. It is found that the instability phenomenon manifests itself as a fast-scale bifurcation at the switching period, which implies the occurrence of border collision bifurcation, or is related to the transition of the regular operating mode of the SEPIC. According to the theoretical analysis and simulation results, the effects of parameters on system stability, and the locations of the bifurcation points are confirmed. Moreover, the effects of such an instability on power factor and switching stress are also discussed. Finally, the occurrence of the asymmetric bifurcation locations is investigated. The results show that this work provides a convenient means of predicting stability boundaries which can facilitate the selection of the practical parameters.

Key words: fast-scale instability, border collision bifurcation, SEPIC power factor pre-regulator, discontinuous current mode

中图分类号:  (Nonlinear dynamics and chaos)

  • 05.45.-a
84.30.Jc (Power electronics; power supply circuits) 84.70.+p (High-current and high-voltage technology: power systems; power transmission lines and cables)