Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (9): 26-30.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Transient-State Analysis of Closed -Loop PWM DC-DC Converter System via Symbolic Method

Ding Yue-hua  Chen Yan-feng  Chen lin-feng   

  1. School of Electronic and Information Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2007-01-24 Online:2007-09-25 Published:2007-09-25
  • Contact: 丁跃华(1982-) ，男，博士生，主要从事非线性电路与系统理论与应用、功率电子方面的研究. E-mail:teenwillfar@163. com
  • About author:丁跃华(1982-) ，男，博士生，主要从事非线性电路与系统理论与应用、功率电子方面的研究.
  • Supported by:

    国家自然科学基金资助项目(60372004)

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Abstract:

In order to more efficiently guide the analysis and design of a circuit , this paper presents a method to obtain the analytical solutions to transient-state responses and steady-state ripples of closed-loop Pulse-Width Modulation (PWM) DC-DC converter systems in CCM mode (Continuous Conduction Mode) , and extends the equivalent small parameter (ESP) method in combination with the multiple-scale method to the transient-state analysis of the closed-loop PWM DC-DC converter systems. According to the simulated results , the method of symbolic analysis may result in a simulation waveform similar to that obtained by the method based on the circuit principle , which verifies the effectiveness of the proposed method. Moreover , all the results in symbolic form can provide theoretical guidance for the circuit design and the analysis of nonlinear stability.

Key words: Pulse-Width Modulation, DC-DC converter, closed-loop system, transient state, multiple-scale method, symbolic analysis