›› 2013, Vol. 26 ›› Issue (6): 96-.

• 论文 • 上一篇    下一篇

数字式电流型降压变换器的建模研究

徐振,赵晨   

  1. (1.浙江机电职业技术学院 电气电子学院,浙江 杭州 310053;2.杭州电子科技大学 自动化学院,浙江 杭州 310018)
  • 出版日期:2013-06-15 发布日期:2013-06-04
  • 作者简介:徐振(1977—),男,硕士,讲师。研究方向:电力电子控制技术。E-mail:chinaxz@vip.163.com

Modeling of Digital Current Mode Controlled Buck Converter

XU Zhen,ZHAO Chen   

  1. (1.Institute of Electrical and Electronic Engineering,Zhejiang Institute of Electromechanical Technology,Hangzhou 310053,China;2.Institute of Automation,Hangzhou University of Electronic Science and Technology,Hangzhou 310018,China)
  • Online:2013-06-15 Published:2013-06-04

摘要:

针对数字式控制芯片与模拟式控制芯片在动态响应上有所欠缺的问题,文中对数字式电流型降压变化器的模型进行了分析。指出了合理的斜坡补偿可以使得电流环路稳定,并得到受控电流源。电压采样点会决定系统的延时,在数字系统中,应保证采样的信息在最短的时间内得到使用。仿真和实验的频域和时域的结果都验证了数学模型的合理性。

关键词: 降压变换器, 数字控制, 电流型, 系统延时

Abstract:

In view of the poor dynamic response of digital and analog controller chip,the digital current step-down model of change is analyzed.Reasonable slope compensation can result in current loop stability and a controlled current source.Voltage sampling points will determine the time delay of the system,guaranteeing that the sampling information in the shortest possible time be used in digital systems.Simulation and experimental results of frequency domain and time domain validate the feasibility of the mathematical model.

Key words: buck converter;digital control;current mode control;time delay

中图分类号: 

  • TM46