华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (9): 26-30.

• 电子、通信与自动控制 • 上一篇    下一篇

用符号法分析PWM DC-DC 变换器闭环系统的瞬态

丁跃华 陈艳峰 陈劲峰   

  1. 华南理工大学 电子与信息学院,广东 广州 510640
  • 收稿日期:2007-01-24 出版日期:2007-09-25 发布日期:2007-09-25
  • 通信作者: 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
  • 作者简介: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.
  • 基金资助:

    国家自然科学基金资助项目(60372004)

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)

摘要: 为了更好地指导电路分析与设计,提出了一种求解连续导通模式(CCM) 下脉宽调制(PWM) DC-DC 变换器闭环系统瞬态解析解及稳态纹波解析解的方法,并结合多尺度法,将等效小参量法推广到PWM DC-DC 变换器闭环系统的瞬态分析中.仿真结果表明,符号分析法得到的仿真波形与基于电路原理的数值仿真波形相近,从而验证了文中提出方法的有效性.所得结果均为符号表达式,可为工程设计提供理论指导,并可进一步用于系统的非线性特性及稳定性分析.

关键词: 脉宽调制, DC-DC 变换器, 闭环系统, 瞬态, 多尺度法, 符号分析

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