Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (12): 120504-120504.doi: 10.1088/1674-1056/22/12/120504

• GENERAL • 上一篇    下一篇

Effects of switching frequency and leakage inductance on slow-scale stability in a voltage controlled flyback converter

王发强, 马西奎   

  1. State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
  • 收稿日期:2013-02-13 修回日期:2013-05-06 出版日期:2013-10-25 发布日期:2013-10-25
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51007068), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20100201120028), the Natural Science Basic Research Plan in Shaanxi Province, China (Grant No. 2012JQ7026), the Fundamental Research Funds for the Central Universities, China (Grant No. 2012jdgz09), and the Fund from the State Key Laboratory of Electrical Insulation and Power Equipment, China (Grant No. EIPE12303).

Effects of switching frequency and leakage inductance on slow-scale stability in a voltage controlled flyback converter

Wang Fa-Qiang (王发强), Ma Xi-Kui (马西奎)   

  1. State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
  • Received:2013-02-13 Revised:2013-05-06 Online:2013-10-25 Published:2013-10-25
  • Contact: Wang Fa-Qiang E-mail:faqwang@mail.xjtu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51007068), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20100201120028), the Natural Science Basic Research Plan in Shaanxi Province, China (Grant No. 2012JQ7026), the Fundamental Research Funds for the Central Universities, China (Grant No. 2012jdgz09), and the Fund from the State Key Laboratory of Electrical Insulation and Power Equipment, China (Grant No. EIPE12303).

摘要: The effects of both the switching frequency and the leakage inductance on the slow-scale stability in a voltage controlled flyback converter are investigated in this paper. Firstly, the system description and its mathematical model are presented. Then, the improved averaged model, which covers both the switching frequency and the leakage inductance, is established, and the effects of these two parameters on the slow-scale stability in the system are analyzed. It is found that the occurrence of Hopf bifurcation in the system is the main reason for losing its slow-scale stability and both the switching frequency and the leakage inductance have an important effect on this slow-scale stability. Finally, the effectiveness of the improved averaged model and that of the corresponding theoretical analysis are confirmed by the simulation results and the experimental results.

关键词: flyback converter, slow-scale stability, improved averaged model, Hopf bifurcation

Abstract: The effects of both the switching frequency and the leakage inductance on the slow-scale stability in a voltage controlled flyback converter are investigated in this paper. Firstly, the system description and its mathematical model are presented. Then, the improved averaged model, which covers both the switching frequency and the leakage inductance, is established, and the effects of these two parameters on the slow-scale stability in the system are analyzed. It is found that the occurrence of Hopf bifurcation in the system is the main reason for losing its slow-scale stability and both the switching frequency and the leakage inductance have an important effect on this slow-scale stability. Finally, the effectiveness of the improved averaged model and that of the corresponding theoretical analysis are confirmed by the simulation results and the experimental results.

Key words: flyback converter, slow-scale stability, improved averaged model, Hopf bifurcation

中图分类号:  (Nonlinear dynamics and chaos)

  • 05.45.-a
84.30.Jc (Power electronics; power supply circuits) 45.10.Hj (Perturbation and fractional calculus methods)